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Journal articles on the topic 'Bypass'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Abla, Adib A., Cameron M. McDougall, Jonathan D. Breshears, and Michael T. Lawton. "Intracranial-to-intracranial bypass for posterior inferior cerebellar artery aneurysms: options, technical challenges, and results in 35 patients." Journal of Neurosurgery 124, no. 5 (2016): 1275–86. http://dx.doi.org/10.3171/2015.5.jns15368.

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OBJECT Intracranial-to-intracranial (IC-IC) bypasses are alternatives to traditional extracranial-to-intracranial (EC-IC) bypasses to reanastomose parent arteries, reimplant efferent branches, revascularize branches with in situ donor arteries, and reconstruct bifurcations with interposition grafts that are entirely intracranial. These bypasses represent an evolution in bypass surgery from using scalp arteries and remote donor sites toward a more local and reconstructive approach. IC-IC bypass can be utilized preferentially when revascularization is needed in the management of complex aneurysm

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Finlay, Erik, Sam Palmer, Benjamin Abes, Benjamin Abo, and Jennifer Fishe. "Clinical, Operational, and Socioeconomic Analysis of EMS Bypass of the Closest Facility for Pediatric Asthma Patients." Western Journal of Emergency Medicine 22, no. 4 (2021): 972–78. http://dx.doi.org/10.5811/westjem.2021.4.50382.

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Introduction: Pediatric hospital care is becoming increasingly regionalized, with fewer facilities providing inpatient care for common conditions such as asthma. That trend has major implications for emergency medical services (EMS) medical care and operations because EMS historically transports patients to the closest facility. This study describes EMS transport patterns of pediatric asthma patients in greater depth, including an analysis of facility bypass rates and the association of bypass with demographics and clinical outcomes. Methods: This was a retrospective study of pediatric asthma

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Tayebi Meybodi, Ali, Wendy Huang, Arnau Benet, Olivia Kola, and Michael T. Lawton. "Bypass surgery for complex middle cerebral artery aneurysms: an algorithmic approach to revascularization." Journal of Neurosurgery 127, no. 3 (2017): 463–79. http://dx.doi.org/10.3171/2016.7.jns16772.

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OBJECTManagement of complex aneurysms of the middle cerebral artery (MCA) can be challenging. Lesions not amenable to endovascular techniques or direct clipping might require a bypass procedure with aneurysm obliteration. Various bypass techniques are available, but an algorithmic approach to classifying these lesions and determining the optimal bypass strategy has not been developed. The objective of this study was to propose a comprehensive and flexible algorithm based on MCA aneurysm location for selecting the best of multiple bypass options.METHODSAneurysms of the MCA that required bypass

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Sanai, Nader, Zsolt Zador, and Michael T. Lawton. "BYPASS SURGERY FOR COMPLEX BRAIN ANEURYSMS." Neurosurgery 65, no. 4 (2009): 670–83. http://dx.doi.org/10.1227/01.neu.0000348557.11968.f1.

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Abstract OBJECTIVE Bypass surgery for brain aneurysms is evolving from extracranial-intracranial (EC-IC) to intracranial-intracranial (IC-IC) bypasses that reanastomose parent arteries, revascularize efferent branches with in situ donor arteries or reimplantation, and reconstruct bifurcated anatomy with grafts that are entirely intracranial. We compared results with these newer IC-IC bypasses to conventional EC-IC bypasses. METHODS During a 10-year period, 82 patients underwent bypass surgery as part of their aneurysm management. A quarter of the patients presented with ruptured aneurysms and

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Bremmer, Jochem P., Bon H. Verweij, Catharina J. M. Klijn, Albert van der Zwan, L. Jaap Kappelle, and Cornelis A. F. Tulleken. "Predictors of patency of excimer laser–assisted nonocclusive extracranial-to-intracranial bypasses." Journal of Neurosurgery 110, no. 5 (2009): 887–95. http://dx.doi.org/10.3171/2008.9.jns08646.

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Object Excimer laser–assisted nonocclusive anastomosis (ELANA) is a technique that can be used for extracranial-to-intracranial (EC-IC) bypasses, without the necessity of temporary occlusion of the donor or recipient artery. Information on predictors of patency of EC-IC bypasses in general and the ELANA bypass in particular is sparse. The authors studied 159 ELANA EC-IC bypasses to find predictors of patency. Methods From a prospective database of patients who underwent EC-IC bypass surgery, 143 consecutive patients who underwent a total of 159 ELANA bypasses were studied. The associations of

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Stapleton, Christopher J., Gursant S. Atwal, Ahmed E. Hussein, Sepideh Amin-Hanjani, and Fady T. Charbel. "The cut flow index revisited: utility of intraoperative blood flow measurements in extracranial-intracranial bypass surgery for ischemic cerebrovascular disease." Journal of Neurosurgery 133, no. 5 (2020): 1396–400. http://dx.doi.org/10.3171/2019.5.jns19641.

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OBJECTIVEIn extracranial-intracranial (EC-IC) bypass surgery, the cut flow index (CFI) is the ratio of bypass flow (ml/min) to donor vessel cut flow (ml/min), and a CFI ≥ 0.5 has been shown to correlate with bypass patency. The authors sought to validate this observation in a large cohort of EC-IC bypasses for ischemic cerebrovascular disease with long-term angiographic follow-up.METHODSAll intracranial bypass procedures performed at a single institution between 2003 and 2018 were reviewed. Demographic, clinical, angiographic, and operative data were recorded and analyzed according to bypass p

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Klopries, Elena-Maria, Zhiqun Daniel Deng, Theresa U. Lachmann, Holger Schüttrumpf, and Bradly A. Trumbo. "Surface bypass as a means of protecting downstream-migrating fish: lack of standardised evaluation criteria complicates evaluation of efficacy." Marine and Freshwater Research 69, no. 12 (2018): 1882. http://dx.doi.org/10.1071/mf18097.

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Surface bypasses are downstream migration structures that can help reduce hydropower-induced damage to migrating fish. However, no comprehensive design concept that facilitates good surface bypass performance for a wide range of sites and species is available. This is why fish-passage efficiencies at recently built bypass structures vary widely between 0% and up to 97%. We reviewed 50 surface bypass performance studies and existing guidelines for salmonids, eels and potamodromous species to identify crucial design criteria for surface bypasses employed in North America, Europe and Australia. T

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Gayá, J., A. Del Río Prego, J. Guilleuma, et al. "Coronary Steal Syndrome." Cardiovascular Surgery 1, no. 2 (1993): 186–89. http://dx.doi.org/10.1177/096721099300100221.

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A patient who suffered recurrent myocardial ischaemia and cerebrovascular symptoms 56 months after a quadruple coronary bypass is reported. Three coronary arteries had been bypassed using reversed saphenous vein and the other using the left internal mammary artery (IMA). Coronary angiography demonstrated patency of all bypasses but the presence of an obstruction of the left subclavian artery proximal to the origin of the left IMA, with angiographic criteria of the steal syndrome. The patient's symptoms were relieved by bypass from the left common carotid artery to the distal left subclavian ar

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Andrawes, Peter A., Masood A. Shariff, John P. Nabagiez, et al. "Evolution of Minimally Invasive Coronary Artery Bypass Grafting." Innovations: Technology and Techniques in Cardiothoracic and Vascular Surgery 13, no. 2 (2018): 81–90. http://dx.doi.org/10.1097/imi.0000000000000483.

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Objective Minimally invasive coronary surgery approach for coronary artery bypass grafting is a safe and reproducible procedure for multivessel revascularization. This study reviewed a single surgeon's experience with minimally invasive coronary surgery coronary artery bypass grafting, including operative time, number of bypasses, and conversion to sternotomy. Methods A prospective database of consecutive minimally invasive coronary surgery coronary artery bypass grafting procedures from 2005 to 2013 was reviewed. A small anterolateral left thoracotomy allowed left internal mammary artery harv

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Solaković, Emir, Dragan Totić, and Sid Solaković. "Femoro-Popliteal Bypass Above Knee with Saphenous Vein vs Synthetic Graft." Bosnian Journal of Basic Medical Sciences 8, no. 4 (2008): 367–72. http://dx.doi.org/10.17305/bjbms.2008.2899.

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There is still debate whether sintethic graft (polytetrafluoroethylene or Dacron) is equivalent to vein as bypass graft material for the above-knee femoropopliteal bypass. Therefore, we performed prospective randomized trial to compare vein with polytetrafluoroethylene/dacron for femoropopliteal bypasses with the distal anastomosis above the knee. Between January 2000 and June 2003, 121 femoropopliteal bypasses were performed. The indications for operation were severe claudication in 96 cases, rest pain in 16 cases, and ulceration in 9 cases. After randomization, 60 reversed saphenous venous b

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Yoon, Seungwon, Jan-Karl Burkhardt, and Michael T. Lawton. "Long-term patency in cerebral revascularization surgery: an analysis of a consecutive series of 430 bypasses." Journal of Neurosurgery 131, no. 1 (2019): 80–87. http://dx.doi.org/10.3171/2018.3.jns172158.

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OBJECTIVELarge cohort analysis concerning intracerebral bypass patency in patients with long-term follow-up (FU) results is rarely reported in the literature. The authors analyzed the long-term patency of extracranial-to-intracranial (EC-IC) and intracranial-to-intracranial (IC-IC) bypass procedures.METHODSAll intracranial bypass procedures performed between 1997 and 2017 by a single surgeon were screened. Patients with postoperative imaging (CT angiography, MR angiography, or catheter angiography) were included and grouped into immediate (< 7 days), short-term (7 days–1 year), and long-ter

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Mohit, Alex A., Laligam N. Sekhar, Sabareesh K. Natarajan, Gavin W. Britz, and Basavaraj Ghodke. "High-flow Bypass Grafts in the Management of Complex Intracranial Aneurysms." Operative Neurosurgery 60, suppl_2 (2007): ONS—105—ONS—123. http://dx.doi.org/10.1227/01.neu.0000249243.25429.ee.

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Abstract THE MAJORITY OF intracranial aneurysms can be treated by either endovascular coiling or microsurgical clipping. A small group of aneurysms may require vascular bypass or reconstruction for their management. A variety of vascular reconstruction techniques are available, including direct suture, patch grafting, local reimplantations, side to side anastomosis, and bypass grafts. Bypass grafts may include low-flow (superficial temporal to middle cerebral) and high-flow bypass grafts using either the radial artery or saphenous vein. In this article, the indications and techniques of high-f

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Quiñones-Hinojosa, Alfredo, and Michael T. Lawton. "In Situ Bypass in the Management of Complex Intracranial Aneurysms: Technique Application in 13 Patients." Operative Neurosurgery 57, suppl_1 (2005): 140–45. http://dx.doi.org/10.1227/01.neu.0000163599.78896.f4.

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Abstract OBJECTIVE: Cerebral revascularization is an important part of the treatment of complex intracranial aneurysms that require deliberate occlusion of a parent artery. In situ bypass brings together intracranial donor and recipient arteries that lie parallel and in close proximity to one another rather than using an extracranial donor artery. An experience with in situ bypasses was retrospectively reviewed. METHODS: Thirteen aneurysms were treated with in situ bypasses between 1997 and 2004. During this time, 1071 aneurysms were treated microsurgically and 46 bypasses were performed as pa

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Baranoski, Jacob F., Colin J. Przybylowski, Justin R. Mascitelli, Michael J. Lang, and Michael T. Lawton. "Anterior Inferior Cerebellar Artery Bypasses: The 7-Bypass Framework Applied to Ischemia and Aneurysms in the Cerebellopontine Angle." Operative Neurosurgery 19, no. 2 (2019): 165–74. http://dx.doi.org/10.1093/ons/opz347.

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Abstract BACKGROUND Aneurysms of the anterior inferior cerebellar artery (AICA) are rare. Primary clip reconstruction of these lesions is a challenge because of the limited surgical exposure and frequent nonsaccular aneurysm morphology. Endovascular treatment options exist, but outcomes are equivalent to those for open surgery. Historically, AICA aneurysms not amenable to clipping or primary coiling have been treated with parent vessel sacrifice. OBJECTIVE To determine whether an AICA revascularization strategy would afford for the safe treatment of AICA aneurysms and other posterior circulati

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Arnone, Gregory D., Ziad A. Hage, and Fady T. Charbel. "Single Vessel Double Anastomosis for Flow Augmentation – A Novel Technique for Direct Extracranial to Intracranial Bypass Surgery." Operative Neurosurgery 17, no. 4 (2019): 365–75. http://dx.doi.org/10.1093/ons/opy396.

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AbstractBACKGROUNDA double anastomosis using a single superficial temporal artery (STA) donor branch for both a proximal side-to-side (S2S) and a distal end-to-side anastomosis is a novel direct bypass technique for use in selected patients necessitating flow augmentation.OBJECTIVETo describe the single-vessel double anastomosis (SVDA) technique, including its indications, advantages, and limitations, in addition to reporting our cases series of patients who underwent a SVDA bypass surgery.METHODSPatients undergoing a SVDA bypass at a single institution between January 2010 and February 2016 w

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Burkhardt, Jan-Karl, Sonia Yousef, Halima Tabani, Arnau Benet, Roberto Rodriguez Rubio, and Michael T. Lawton. "Combination Superficial Temporal Artery-Middle Cerebral Artery Bypass and M2–M2 Reanastomosis With Trapping of a Stented Distal Middle Cerebral Artery Aneurysm: 3-Dimensional Operative Video." Operative Neurosurgery 15, no. 5 (2018): E67—E68. http://dx.doi.org/10.1093/ons/opy097.

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Abstract Distal middle cerebral artery (MCA) aneurysms often have non-saccular morphology and cannot be clipped, requiring revascularization and trapping instead. Combination bypasses are needed when 2 arteries exit the aneurysm, and extracranial–intracranial and intracranial–intracranial bypasses can be used. This video demonstrates a combination bypass used to treat a previously stented distal MCA aneurysm with both a superficial temporal artery (STA)-to-MCA bypass and an M2-to-M2 reanastomosis. This 56-yr-old man presented with distal left-sided MCA aneurysm 2 years earlier and attempted st

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Abla, Adib A., and Michael T. Lawton. "Anterior cerebral artery bypass for complex aneurysms: an experience with intracranial-intracranial reconstruction and review of bypass options." Journal of Neurosurgery 120, no. 6 (2014): 1364–77. http://dx.doi.org/10.3171/2014.3.jns132219.

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Object The authors describe their experience with intracranial-to-intracranial (IC-IC) bypasses for complex anterior cerebral artery (ACA) aneurysms with giant size, dolichoectatic morphology, or intraluminal thrombus; they determine how others have addressed the limitations of ACA bypass; and they discuss clinical indications and microsurgical technique. Methods A consecutive, single-surgeon experience with ACA aneurysms and bypasses over a 16-year period was retrospectively reviewed. Bypasses for ACA aneurysms reported in the literature were also reviewed. Results Ten patients had aneurysms

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Gadzhiagaev, V. S., An N. Konovalov, O. D. Shekhtman, and Sh Sh Eliava. "Revascularization techniques in surgical treatment of large and giant anterior cerebral artery aneurysms: literature review." Vestnik nevrologii, psihiatrii i nejrohirurgii (Bulletin of Neurology, Psychiatry and Neurosurgery), no. 7 (June 16, 2022): 486–96. http://dx.doi.org/10.33920/med-01-2207-03.

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Despite common use of revascularization for aneurysms of other locations, the role of bypass has been ignored for long time. In this study we describe actual status of revascularization in surgical treatment of ACA aneurysms based on an analysis of current literature. Search of literature was performed in data bases PubMed and Web of Science. Treatment of 80 patients in 24 articles was evaluated. In situ A3‑A3 bypass and extra — intracranial bypass with the superficial temporal artery are the most used techniques. The contralateral superficial temporal artery is the most convenient interpositi

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Romiti, Marcello, Fausto Miranda, Francisco Cardoso Brochado-Neto, Marise Kikuchi, and Maximiano Albers. "Importance Of The Arteriographic Anatomy Of The Descending Genicular Artery And Sural Arteries In Patients With Atherosclerotic Occlusion Of The Popliteal Artery." Vascular 14, no. 4 (2006): 201–5. http://dx.doi.org/10.2310/6670.2006.00043.

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Bypasses to the descending genicular artery (DGA) or the medial sural artery (MSA) have been performed with acceptable rates of midterm success. The arteriographic appearance of the DGA, the MSA, and the lateral sural artery (LSA) was described and the applicability of bypass to these vessels was investigated. The arteriograms of 45 patients who had occlusion of the below-knee popliteal artery were analyzed to determine the presence, dominance, and extension of collaterals for each perigeniculate branch, which were used to assess the applicability of a perigeniculate bypass. A dominant perigen

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Sasajima, T., Y. Kubo, M. Kokubo, Y. Izumi, and M. Inaba. "Comparison of Reversed and in Situ Saphenous Vein Grafts for Infragenicular Bypass: Experience of Two Surgeons." Cardiovascular Surgery 1, no. 1 (1993): 38–43. http://dx.doi.org/10.1177/096721099300100111.

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A series of 241 consecutive autogenous vein bypasses for chronic lower-limb ischaemia performed by two surgeons since 1980 was reviewed. After 1985, in situ vein bypass was employed preferentially and was compared with reversed vein bypass. The two groups of patients had similar risk factors, indications and outflow. Of the 241 bypasses, 157 were to the below-knee popliteal artery and 84 to infrapopliteal arteries. The utilization rates of a single ipsilateral saphenous vein were 57.5% for reversed and 71.9% for in situ vein bypass. However, in situ vein bypass was impossible in 43 procedures

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Stewart, Luke, Benjamin J. Pearce, Adam W. Beck, and Emily L. Spangler. "Examination of race and infrainguinal bypass conduit use in the Society for Vascular Surgery Vascular Quality Initiative." Vascular 28, no. 6 (2020): 739–46. http://dx.doi.org/10.1177/1708538120927704.

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Background Vein conduit is known to have better patency than prosthetic for infrainguinal bypass. Here we explore if racial disparities exist in infrainguinal bypass vein conduit use amid preoperative patient and systemic factors. Methods Retrospective Society for Vascular Surgery Vascular Quality Initiative data for 23,959 infrainguinal bypasses between 2003 and 2017 for occlusive disease were analyzed. For homogeneity, only infrainguinal bypasses originating from the common femoral artery were included. Demographics of patients receiving vein vs prosthetic were compared and logistic regressi

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Uchino, Haruto, Jae-Hoon Kim, Noriyuki Fujima, et al. "Synergistic Interactions Between Direct and Indirect Bypasses in Combined Procedures: The Significance of Indirect Bypasses in Moyamoya Disease." Neurosurgery 80, no. 2 (2017): 201–9. http://dx.doi.org/10.1227/neu.0000000000001201.

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Abstract BACKGROUND: Whether additional indirect bypasses effectively contribute to revascularization in combined procedures remains unclear in patients with moyamoya disease. OBJECTIVE: To evaluate the longitudinal changes associated with combined procedures while following up pediatric and adult patients long term and to assess whether any other clinical factors or hemodynamic parameters affected these changes to determine an optimal surgical strategy. METHODS: We studied 58 hemispheres in 43 adults and 39 hemispheres in 26 children who underwent combined revascularization for moyamoya disea

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Williams, Brian A., Michael L. Kentor, John P. Williams, et al. "PACU Bypass after Outpatient Knee Surgery Is Associated with Fewer Unplanned Hospital Admissions but More Phase II Nursing Interventions." Anesthesiology 97, no. 4 (2002): 981–88. http://dx.doi.org/10.1097/00000542-200210000-00034.

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Background The authors recently proposed a recovery scoring system for outpatients receiving regional anesthesia (RA) or general anesthesia (GA). This scoring system was designed to allow qualifying patients to be directly routed to the phase II (step-down) recovery unit instead of the traditional postanesthesia care unit (PACU). We report PACU bypass rates using these criteria, and the extent to which PACU bypass was associated with (1) required nursing interventions in the step-down recovery unit, and (2) successful same-day discharge. Methods Day-of-surgery outcomes were studied for 894 out

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Zukauskas, G., H. Ulevicius, and E. Janusauskas. "An Optimal Inflow Procedure for Multi-Segmental Occlusive Arterial Disease: Ilio-Femoral versus Aorto-Bifemoral Bypass." Cardiovascular Surgery 6, no. 3 (1998): 250–55. http://dx.doi.org/10.1177/096721099800600306.

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Treatment of chronic critical limb ischemia still remains one of the most serious problems of vascular surgery. Most often, chronic critical limb ischemia is caused by multi-segmental disease of arterial tree, involving both the aorto-femoral and infrainguinal vessels. In the majority of these cases, proper correction of aortoiliac arteries is sufficient to restore the circulation in lower limbs. However, in 10–15% it is necessary to perform multi-segmental reconstructions. In these cases it is extremely important to choose the optimal inflow procedure. The aim of this retrospective study was

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Abla, Adib A., Gurpreet Gandhoke, Justin C. Clark, et al. "Surgical Outcomes for Moyamoya Angiopathy at Barrow Neurological Institute With Comparison of Adult Indirect Encephaloduroarteriosynangiosis Bypass, Adult Direct Superficial Temporal Artery–to–Middle Cerebral Artery Bypass, and Pediatric Bypass." Neurosurgery 73, no. 3 (2013): 430–39. http://dx.doi.org/10.1227/neu.0000000000000017.

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Abstract BACKGROUND: Untreated, moyamoya angiopathy is a progressive vaso-occlusive process that can lead to ischemic or hemorrhagic stroke. OBJECTIVE: To review 1 institution's surgical experience with both direct and indirect bypass (encephaloduroarteriosynangiosis) in adult and pediatric groups. METHODS: A retrospective review was conducted of a consecutive series of patients treated for moyamoya angiopathy between 1995 and 2009. RESULTS: Thirty-nine adult patients underwent indirect bypass as their initial therapy; 29 adult patients underwent direct bypass. Twenty-four pediatric patients i

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Petrovskii, D. V., V. P. Vasiliev, E. E. Vlasova, R. S. Latypov, D. M. Galayutdinov, and A. A. Shiryaev. "In-hospital results of coronary artery bypass grafting in patients with coronary artery disease and unverified distal coronary bed." Russian Cardiology Bulletin 20, no. 1 (2025): 81. https://doi.org/10.17116/cardiobulletin20252001181.

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Objective. To analyze in-hospital outcomes of coronary artery bypass grafting (CABG) in patients with at least one target coronary artery (CA) with unverified distal bed (UDB). Material and methods. We analyzed in-hospital outcomes of CABG in 76 patients with at least one CA with UDB between September 1, 2022 and June 30, 2024. CA with UDB was analyzed after preoperative coronary angiography (CAG). Intraoperatively, we measured diameters (d) of all coronary arteries. Some patients (n=59) underwent intraoperative transit time flowmetry (TTFM). The rule of complete myocardial revascularization w

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De Caridi, Giovanni, Mafalda Massara, Chiara Barilla, and Filippo Benedetto. "Peripheral Prosthetic Vascular Graft Infection: A 5-Year Retrospective Study." Medical Sciences 13, no. 2 (2025): 71. https://doi.org/10.3390/medsci13020071.

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Background/Objectives: Peripheral prosthetic vascular graft infection represents a very serious complication after lower limb revascularization, with amputation and mortality rates up to 70% and 30%, respectively. This study was designed to determine the incidence of prosthetic graft infection, amputation, and mortality rate in our institution, analyzing different types of treatment. Methods: A retrospective cohort single institution review of peripheral prosthetic bypass grafts evaluated patient demographics, comorbidities, indications, location of bypass, type of prosthetic material, and cas

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van Doormaal, Tristan P. C., Albert van der Zwan, Bon H. Verweij, Luca Regli, and Cornelis A. F. Tulleken. "Giant Aneurysm Clipping Under Protection of an Excimer Laser–Assisted Non-occlusive Anastomosis Bypass." Neurosurgery 66, no. 3 (2010): 439–47. http://dx.doi.org/10.1227/01.neu.0000364998.95710.73.

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Abstract OBJECTIVE To define the safety and clinical value of giant aneurysm clipping under protection of an excimer laser–assisted non-occlusive anastomosis (ELANA) bypass. METHODS We report 32 patients with an uncoilable intracerebral giant aneurysm, operated on with the aid of an ELANA protective bypass between January 1, 1994, and January 1, 2008. We retrospectively collected data from patient records. Follow-up data were updated by telephone interview. We defined a favorable outcome as a successfully treated aneurysm and a better or equal postoperative modified Rankin scale (mRS) score co

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Knott, Mueller, Pander, and Geist. "Fish Passage and Injury Risk at a Surface Bypass of a Small-Scale Hydropower Plant." Sustainability 11, no. 21 (2019): 6037. http://dx.doi.org/10.3390/su11216037.

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In contrast to the efforts made to develop functioning fishways for upstream migrants, the need for effective downstream migration facilities has long been underestimated. The challenge of developing well-performing bypasses for downstream migrants involves attracting the fish to the entrance and transporting them quickly and unharmed into the tailrace. In this study, the acceptance of different opening sizes of a surface bypass as well as the injuries which fish experience during the passage were examined. Overall bypass acceptance was low compared to the turbine passage. There was no signifi

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Muralidhar, R., and Suraj Muralidhar. "Extra anatomical bypass grafting for limb salvage: a case report." International Surgery Journal 4, no. 9 (2017): 3146. http://dx.doi.org/10.18203/2349-2902.isj20173693.

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Extra-anatomical bypass grafting is a recognised method of lower limb re-vascularisation in high-risk patients who cannot tolerate aortic cross clamping, or in those with a hostile abdomen1. Extra-anatomic bypasses are surgical arterial bypass procedures that circumvent the “normal” anatomical pathways. While such procedures can be performed in any vascular bed, the term most frequently is used to describe those bypasses that reroute blood to the lower extremities, avoiding intracavitary procedures3. Initially introduced as alternative revascularization methods in the treatment of peripheral a

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Amin-Hanjani, Sepideh, John H. Shin, Meide Zhao, Xinjian Du, and Fady T. Charbel. "Evaluation of extracranial–intracranial bypass using quantitative magnetic resonance angiography." Journal of Neurosurgery 106, no. 2 (2007): 291–98. http://dx.doi.org/10.3171/jns.2007.106.2.291.

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Object To date, angiography has been the primary modality for assessing graft patency following extracranial–intracranial bypass. The utility of a noninvasive and quantitative method of assessing bypass function postoperatively was evaluated using quantitative magnetic resonance (MR) angiography. Methods One hundred one cases of bypass surgery performed over a 5.5-year period at a single institution were reviewed. In 62 cases, both angiographic and quantitative MR angiographic data were available. Intraoperative flow measurements were available in 13 cases in which quantitative MR angiography

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Ferraz, Álvaro Antônio Bandeira, Cristiano Souza Leão, Josemberg Marins Campos, Antônio Roberto Barros Coelho, Bruno Zilbestein, and Edmundo Machado Ferraz. "An experimental study of the electrical activity of the bypassed stomach in the Roux-en-Y gastric bypass." Arquivos de Gastroenterologia 44, no. 2 (2007): 162–67. http://dx.doi.org/10.1590/s0004-28032007000200015.

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BACKGROUND: Surgical options for morbid obesity are diverse, and the Roux-en-Y gastric bypass, initially described by Fobi has gained popularity. Knowledge about the physiology of the bypassed stomach is limited because this newly produced segment of the stomach is inaccessible to endoscopic or contrast radiological studies. AIM: To evaluate the myoelectric activity of the bypassed stomach and its reply to the feeding. METHODS: An experimental protocol was conducted to evaluate postoperative gastric bypassed motility in dogs submitted to the Roux-en-Y gastric bypass procedure. Two groups of fi

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Pathi, Vivek L., Paul S. Ramphal, Geoffrey A. Berg, and Kenneth J. D. MacArthur. "Emergency Bypass Without Bypass!" Annals of Thoracic Surgery 62, no. 3 (1996): 877–78. http://dx.doi.org/10.1016/s0003-4975(96)00285-8.

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Yamaguchi, Kohji, Akitsugu Kawashima, Takakazu Kawamata, Tomokatsu Hori, and Yoshikazu Okada. "Successful Superficial Temporal Artery-Anterior Cerebral Artery Direct Bypass Using a Long Graft for Moyamoya Disease: Technical Note." Operative Neurosurgery 67, no. 3 (2010): ons145—ons149. http://dx.doi.org/10.1227/01.neu.0000382975.86267.40.

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Abstract BACKGROUND: Although some patients with moyamoya disease need revascularization in the anterior cerebral artery (ACA) territory, there are few reports on direct bypass in the ACA territory because of the difficult surgical technique. OBJECTIVE: To report our technical strategy for superficial temporal artery (STA)-ACA bypass. METHODS: We performed simultaneous STA-ACA and STA-middle cerebral artery direct bypasses in 7 patients with moyamoya disease using the following strategies: creating 2 separate craniotomies for the 2 bypasses, dissecting a long STA graft and securing a recipient

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Davidovic, Lazar, Ilija Kuzmanovic, Dusan Kostic, et al. "Obturator or "lateral" bypass in the management of infected vascular prostheses at the groin." Srpski arhiv za celokupno lekarstvo 130, no. 1-2 (2002): 27–32. http://dx.doi.org/10.2298/sarh0202027d.

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The infection of the previously implanted vascular graft at the groin, is associated with great mortality and morbidity rate [1]. The authors present a retrospective study in which they analyzed management of infected vascular prostheses at the groin, using obturator bypass in 26 cases, and "lateral" bypass in 15 cases. The indications for obturator bypass reconstructions included: 20 infections of aorto-femoral grafts, two infected pse udoaneurysms in the groin after RTA of the superficial femoral artery, and 4 infections of iliac-femoral grafts. The indications for lateral bypass reconstruct

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Cherian, Jacob, Visish Srinivasan, Peter Kan, and Edward AM Duckworth. "Double-Barrel Superficial Temporal Artery-Middle Cerebral Artery Bypass: Can It Be Considered “High-Flow?”." Operative Neurosurgery 14, no. 3 (2017): 288–94. http://dx.doi.org/10.1093/ons/opx119.

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Abstract BACKGROUND Traditionally, superficial temporal artery-middle cerebral artery (STA-MCA) bypass uses one STA branch. Its augmentation of flow has classically been described as “low flow.” In a double-barrel STA-MCA bypass, however, both branches of the STA are utilized. Here we hypothesize that this should not be considered “low flow.” OBJECTIVE To review quantitative flow data from our cases and investigate the impact of double-barrel STA-MCA bypass on total flow augmentation, and to assess whether double-barrel STA-MCA bypass might be useful in situations that traditionally demand mor

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Acerbi, Francesco, Elio Mazzapicchi, Jacopo Falco, et al. "The Role of Bypass Surgery for the Management of Complex Intracranial Aneurysms in the Anterior Circulation in the Flow-Diverter Era: A Single-Center Series." Brain Sciences 12, no. 10 (2022): 1339. http://dx.doi.org/10.3390/brainsci12101339.

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Despite the increasing popularity of flow diverters (FDs) as an endovascular option for intracranial aneurysms, the treatment of complex aneurysms still represents a challenge. Combined strategies using a flow-preservation bypass could be considered in selected cases. In this study, we retrospectively reviewed our series of patients with complex intracranial aneurysms submitted to bypass. From January 2015 to May 2022, 23 patients were selected. We identified 11 cases (47.8%) of MCA, 6 cases (26.1%) of ACA and 6 cases (26.1%) of ICA aneurysms. The mean maximal diameter was 22.73 ± 12.16 mm, 8

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Dostál, Jiří, Vladimír Přibáň, and Jan Mraček. "Extra-intracranial bypass." Rozhledy v chirurgii 104, no. 6 (2025): 247–51. https://doi.org/10.48095/ccrvch2025247.

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Uzum, Mehmet, Isik Kutlu, and Mehmet Celkan. "Comparison of platelet activation in patients undergoing coronary bypass surgery with conventional and mini extracorporeal systems." Azerbaijan Journal of Cardiovascular Surgery 5, no. 1 (2024): 13. http://dx.doi.org/10.5455/azjcvs.2024.03.06.

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Aim: The aim of this study was to compare platelet activation in patients undergoing coronary bypass surgery with conventional and mini extracorporeal systems. Material and Methods: Our study is a retrospective study and a total of 116 patient data were obtained. Patients were divided into two groups as conventional extracorporeal and mini extracorporeal system bypass patients. Equal numbers of patients (n=58) were included in both groups. The data of patients who underwent coronary bypass surgery with conventional and mini extracorporeal systems between January 2022 and December 2022 were inc

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Chalmers, R. T. A., J. J. Hoballah, T. F. Kresowik, et al. "Late Results of a Prospective Study of Direct Intra-Arterial Urokinase Infusion for Peripheral Arterial and Bypass Graft Occlusions." Cardiovascular Surgery 3, no. 3 (1995): 293–97. http://dx.doi.org/10.1177/096721099500300309.

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The outcome of 72 direct intra-arterial urokinase infusions was studied prospectively. Thirty four were performed for native arterial occlusion and 38 for bypass graft occlusion; the immediate success rates were 67.5 and 84% respectively. The overall incidence of complications was 26%. Median follow-up was 36 (range 1–60) months. Seventeen patients (27%) died during follow-up; nine (14%) required a major amputation. Among patients with native arterial occlusion, 29% had no adjunctive procedure after thrombolysis; of these patients, 85% remained patent at a median of 21 (range 3–42) months. Amo

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Sclafani, Robert A., Marianne Tecklenburg, and Angela Pierce. "The mcm5-bob1 Bypass of Cdc7p/Dbf4p in DNA Replication Depends on Both Cdk1-Independent and Cdk1-Dependent Steps in Saccharomyces cerevisiae." Genetics 161, no. 1 (2002): 47–57. http://dx.doi.org/10.1093/genetics/161.1.47.

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Abstract The roles in DNA replication of two distinct protein kinases, Cdc7p/Dbf4p and Cdk1p/Clb (B-type cyclin), were studied. This was accomplished through a genetic and molecular analysis of the mechanism by which the mcm5-bob1 mutation bypasses the function of the Cdc7p/Dbf4p kinase. Genetic experiments revealed that loss of either Clb5p or Clb2p cyclins suppresses the mcm5-bob1 mutation and prevents bypass. These two cyclins have distinct roles in bypass and presumably in DNA replication as overexpression of one could not complement the loss of the other. Furthermore, the ectopic expressi

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Phair, John, John Futchko, Eric B. Trestman, et al. "Protamine sulfate use during tibial bypass does not appear to increase thrombotic events or affect short-term graft patency." Vascular 28, no. 6 (2020): 708–14. http://dx.doi.org/10.1177/1708538120924149.

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Objectives While the use of protamine sulfate as a heparin reversal agent has been extensively reviewed in patients undergoing carotid endarterectomy and coronary artery bypass grafting, there is a lack of literature on protamine’s effects on lower extremity bypasses. The purpose of this study was to determine the risk of protamine sulfate dosing after tibial bypass on thrombotic or bleeding events, including early bypass failure. Methods We performed a retrospective review of our institutional database for patients undergoing primary distal peripheral bypass from January 2009 through December

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Ciancio, Gaetano, and Mark Soloway. "The Use of Natural Veno-Venous Bypass during Surgical Treatment of Renal Cell Carcinoma with Inferior Vena Cava Thrombus." American Surgeon 68, no. 5 (2002): 488–90. http://dx.doi.org/10.1177/000313480206800519.

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Renal cell carcinoma associated with inferior vena cava thrombus complicates radical nephrectomy. Various approaches have been used to deal with this problem including veno-venous and cardiopulmonary bypass. Using natural veno-venous bypass may prevent the use of another type of bypass. A total of 16 patients underwent removal of renal cell carcinoma and an intracaval tumor thrombus without using veno-venous bypass. One of the natural veno-venous bypasses consisted in the mobilization of the liver off the retrohepatic inferior vena cava to allow enhanced access, vascular control, and hepatic v

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Kawashima, Masatou, Albert L. Rhoton, Necmettin Tanriover, Arthur J. Ulm, Alexandre Yasuda, and Kiyotaka Fujii. "Microsurgical anatomy of cerebral revascularization. Part I: Anterior circulation." Journal of Neurosurgery 102, no. 1 (2005): 116–31. http://dx.doi.org/10.3171/jns.2005.102.1.0116.

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Object. Revascularization is an important component of treatment for complex aneurysms that require parent vessel occlusion, skull base tumors that involve major vessels, and certain ischemic diseases. In this study, the authors examined the microsurgical anatomy of cerebral revascularization in the anterior circulation by demonstrating various procedures for bypass surgery. Methods. Twenty-five adult cadaveric specimens were studied, using 3 to 40 magnification, after the arteries and veins had been perfused with colored silicone. The microsurgical anatomy of cerebral revascularization in the

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Schauer, Grant D., Lisanne M. Spenkelink, Jacob S. Lewis, et al. "Replisome bypass of a protein-based R-loop block by Pif1." Proceedings of the National Academy of Sciences 117, no. 48 (2020): 30354–61. http://dx.doi.org/10.1073/pnas.2020189117.

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Efficient and faithful replication of the genome is essential to maintain genome stability. Replication is carried out by a multiprotein complex called the replisome, which encounters numerous obstacles to its progression. Failure to bypass these obstacles results in genome instability and may facilitate errors leading to disease. Cells use accessory helicases that help the replisome bypass difficult barriers. All eukaryotes contain the accessory helicase Pif1, which tracks in a 5′–3′ direction on single-stranded DNA and plays a role in genome maintenance processes. Here, we reveal a previousl

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Tracz, Marian, and Mariusz Kieć. "Operational problems of 2+1 bypass road sections." Archives of Transport 38, no. 2 (2016): 79–89. http://dx.doi.org/10.5604/08669546.1218797.

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The paper presents several problems of designing trunk-road bypasses of towns, which can be very helpful in improving their traffic performance. Such roads perform supplementary functions to the operation of network of motorways and express-roads constructed in Poland over the last decade. These problems include: selection of the cross section, selection and design of intersections and interchanges on bypasses, safety and traffic operation problems. The authors highlight the advantages of bypasses and point out some errors, which can be seen in the operation stage, basing on research and obser

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Mota Prado, Mariana. "Bypasses Institucionais no Brasil." Revista da Faculdade de Direito da Universidade Federal de Uberlândia 49, no. 1 (2021): 8–28. http://dx.doi.org/10.14393/rfadir-v49n1a2021-62774.

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Uma estratégia de reforma que pode ajudar os formuladores de políticas públicas a superar a resistência à mudança institucional é "um bypass institucional". Um bypass institucional não tenta modificar, alterar ou reformar as instituições existentes. Ao invés disso, cria um novo caminho que visa ser mais funcional do que a instituição preexistente. Depois de discutir o que caracteriza um bypass, o presente artigo apresenta dois exemplos do Brasil: uma reforma burocrática chamada Poupatempo, que consiste em um balcão único para diversos serviços burocráticos; e uma reforma policial chamada Unida

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Ramanathan, Dinesh, Nancy Temkin, Louis J. Kim, Basavaraj Ghodke, and Laligam N. Sekhar. "Cerebral Bypasses for Complex Aneurysms and Tumors." Neurosurgery 70, no. 6 (2012): 1442–57. http://dx.doi.org/10.1227/neu.0b013e31824c046f.

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Abstract BACKGROUND: Various techniques of cerebral bypasses are used to treat aneurysms and tumors. OBJECTIVE: To study long-term clinical and radiological outcome of various bypass types and to analyze techniques used in the management of long-term graft problems. METHODS: A consecutive series of patients who underwent revascularization during a 5-year period were analyzed for indications, graft patency, and neurological outcomes. Potential risk factors for bypass problems and the management of bypass stenosis were studied. RESULTS: A total of 80 patients (69 with aneurysms and 11 with tumor

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Woitzik, Johannes, Peter Horn, Peter Vajkoczy, and Peter Schmiedek. "Intraoperative control of extracranial—intracranial bypass patency by near-infrared indocyanine green videoangiography." Journal of Neurosurgery 102, no. 4 (2005): 692–98. http://dx.doi.org/10.3171/jns.2005.102.4.0692.

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Object. Recently, intraoperative fluorescence angiography in which indocyanine green (ICG) is used as a tracer has been introduced as a novel technique to confirm successful aneurysm clipping. The aim of the present study was to assess whether ICG videoangiography is also suitable for intraoperative confirmation of extracranial—intracranial bypass patency. Methods. Forty patients undergoing cerebral revascularization for hemodynamic cerebral ischemia (11 patients), moyamoya disease (18 patients), or complex intracranial aneurysms (11 patients) were included. Superficial temporal artery (STA)—m

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Nisson, Peyton L., Xinmin Ding, Ali Tayebi Meybodi, Ryan Palsma, Arnau Benet, and Michael T. Lawton. "Revascularization of the Posterior Inferior Cerebellar Artery Using the Occipital Artery: A Cadaveric Study Comparing the p3 and p1 Recipient Sites." Operative Neurosurgery 19, no. 2 (2020): E122—E129. http://dx.doi.org/10.1093/ons/opaa023.

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Abstract BACKGROUND Revascularization of the posterior inferior cerebellar artery (PICA) is typically performed with the occipital artery (OA) as an extracranial donor. The p3 segment is the most accessible recipient site for OA-PICA bypass at its caudal loop inferior to the cerebellar tonsil, but this site may be absent or hidden due to a high-riding location. OBJECTIVE To test our hypothesis that freeing p1 PICA from its origin, transposing the recipient into a shallower position, and performing OA-p1 PICA bypass with an end-to-end anastomosis would facilitate this bypass. METHODS The OA was

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