Total magnetic vascular coupling for arterial revascularization

Klima, Uwe; Maringka, Michael; Bagaev, Eric; Kirschner, S.; Haverich, Axel

doi:10.1016/j.jtcvs.2003.09.050

Cited by 24 publications

(12 citation statements)

References 3 publications

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“…The clinical performance, special individual considerations, and the outcome following application, especially postoperative angiography, have been well described by us and others. [3][4][5][6] With increasing popularity of such devices and intense worldwide demand for less invasive approaches in cardiac surgery, automatic anastomotic devices are most likely to be used in a routine clinical fashion in the near future. However, before their routine application, many important questions regarding the safety of these instruments should be answered.…”

Section: Discussionmentioning

confidence: 99%

MRI-Based Safety Evaluation of the Ventrica Magnetic Coronary Anastomotic System

Klima¹,

Beilner²,

Bagaev³

et al. 2007

Asian Cardiovasc Thorac Ann

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The Ventrica Magnetic Vascular Positioner system is a novel automatic anastomotic coupling device for distal coronary artery anastomosis. There is concern that enormous magnetic fields may negatively affect graft anastomosis or coronary artery blood flow, or that they may lead to disconnection of the magnetic ports. Forty-five domestic swine (26.6 +/- 5.9 kg) underwent magnetic resonance imaging after a single Ventrica anastomosis of the left internal mammary artery to the left anterior descending artery. Group A (n = 15) underwent magnetic resonance imaging immediately after surgery, group B (n = 15) was studied after 1 week, and group C (n = 15) after 2 weeks. The animals were sacrificed and the anastomotic sites were examined. All animals survived the imaging procedure. Mean imaging time was 25 +/- 6 min. Although imaging artifacts occurred in the area surrounding the Ventrica port, there were no disconnections or electrocardiographic signs of ischemia during the study period. Upon sacrifice, all anastomoses were patent without alterations in the alignment of the magnetic components. Clinically relevant tests such as cranial magnetic resonance imaging may be safe after use of the Ventrica system for coronary artery revascularization.

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Section: Discussionmentioning

confidence: 99%

MRI-Based Safety Evaluation of the Ventrica Magnetic Coronary Anastomotic System

Klima¹,

Beilner²,

Bagaev³

et al. 2007

Asian Cardiovasc Thorac Ann

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“…Following complete enrollment in the second clinical trial, additional patients were operated upon under broadened indications for use of the MVP  , including multi-vessel grafting, grafting vessels on the posterolateral surface, and using the right internal thoracic artery (RITA), the radial artery and the saphenous vein as graft conduits. One of these patients had a triple all arterial graft OPCAB procedure using the MVP for all four anastomoses [10]. The patient had a LITA-LAD, a ªTº grafted radial artery from the LITA to the marginal branch of the circum¯ex, and a RITA graft to an endarterectomized segment of the right coronary artery (RCA).…”

Section: Methodsmentioning

confidence: 99%

Clinical experience with the Ventrica distal anastomotic device in coronary surgery

Klima¹,

MacVaugh²,

Maringka³

et al. 2004

Minimally Invasive Therapy & Allied Technologies

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The surgical treatment of coronary artery disease is based on bypassing demonstrated lesions with autogenous vascular grafts. The operations have traditionally been invasive, complicated procedures requiring skillful microvascular surgical technique, cardiopulmonary bypass, and temporary cardioplegia. Ventrica, Inc. has developed a coupling device based on magnetic attraction which simplifies the connection of the graft to the coronary artery. Perceived advantages are shortened operating time, the need for less operative exposure, ease of use, versatility, and reliability. Use of the device is easily learned. It is a gentle technique which may be abandoned at any point without grossly noticeable consequence; the vessel remains apparently undamaged and remains suitable for hand-sewn anastomosis. Patient recovery is swift and acceptance high. Immediate operative results, pre-discharge angiograms and 6 month follow up angiograms are all favorable. The device is applicable to multiple graft operations, to all autogenous graft conduits, to end or sequential anastomoses, and to potentially all coronary vessels.

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“…The major advantages of the MCT are that it is simple, minimally invasive and reliable. Currently, MCT is applied in esophageal atresia [5,6] , biliary stenosis [7][8][9][10][11][12] , vascular anastomosis [13][14][15][16][17][18][19] and gastro-intestinal anastomosis [20][21][22][23][24][25][26][27] . Previously, we applied Roux-en-Y choledochojejunostomy incorporating MCT for obstructive jaundice in a canine model [28] .…”

Section: Basic Studymentioning

confidence: 99%

Extrahepatic portacaval shuntviaa magnetic compression technique: A cadaveric feasibility study

Yan

Liu

et al. 2015

WJG

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Author contributions: Yan XP and Liu WY contributed equally to this work; Yan XP and Lv Y designed the study; Yan XP, Lv Y and Ma J performed the research and acquired the data; Yan XP and Li JP analyzed the data; Yan XP, Liu WY and Li JP drafted the manuscript; Yan XP, Liu WY, Ma J and Li JP contributed significantly to the revision of the manuscript. Institutional review board statement: The entire study was carried out in strict accordance with protocols approved by the Xi'an Jiaotong University Biomedical Ethics Committee (Ethics Permit Number: 2014-0303 Abstract AIM: To explore the anatomical feasibility of portacaval shunt using a magnetic compression technique (MCT) in cadavers. METHODS:Computed tomography (CT) images of 30 portal hypertensive patients were obtained. The diameters of the portal vein (PV), the inferior vena cava (IVC), and distance between the two structures were measured. Similar measurements were performed on 20 adult corpses. The feasibility of portacaval shunt based on those measurements was analyzed. First stage of the extrahepatic portacaval shunt using MCT was performed on five cadavers. Specifically, the PV and IVC were exposed through an abdominal incision of the cadavers. The parent magnet was introduced from the femoral vein and was delivered into the IVC by an anchor wire and a 5F Cook catheter. The daughter magnet was introduced into the PV through the splenic vein using an ORIGINAL ARTICLE Basic StudyExtrahepatic portacaval shunt via a magnetic compression technique: A cadaveric feasibility study technical and subject to postoperative complications. Side-to-side portacaval shunt has a high incidence of hepatic encephalopathy [2,3] . H-graft portacaval shunt, as a limited portacaval shunt, can effectively reduce the incidence of hepatic encephalopathy [4] . However, it is also technically challenging and patients who undergo the procedure must be put on long-term use of anticoagulants.The magnetic compression technique (MCT) exploits the attraction between magnets to pull together an area of ischemic necrosis and its surrounding tissue to promote healing. The major advantages of the MCT are that it is simple, minimally invasive and reliable. Currently, MCT is applied in esophageal atresia [5,6] , biliary stenosis [7][8][9][10][11][12] , vascular anastomosis [13][14][15][16][17][18][19] and gastro-intestinal anastomosis [20][21][22][23][24][25][26][27] . Previously, we applied Roux-en-Y choledochojejunostomy incorporating MCT for obstructive jaundice in a canine model [28] . We also confirmed that magnetic rings could be used for rapid vascular reconstruction in a canine liver transplantation model [19] . We first reported the establishment of a portacaval shunt using MCT in dogs, the significant advantage of which is that no stent or any other foreign device was installed [29] . In the present study, we assessed some anatomical parameters that might affect the establishment of extrahepatic portacaval shunt using MCT in humans, and performed five preliminary cadaveric s...

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Total magnetic vascular coupling for arterial revascularization

Cited by 24 publications

References 3 publications

MRI-Based Safety Evaluation of the Ventrica Magnetic Coronary Anastomotic System

MRI-Based Safety Evaluation of the Ventrica Magnetic Coronary Anastomotic System

Clinical experience with the Ventrica distal anastomotic device in coronary surgery

Extrahepatic portacaval shuntviaa magnetic compression technique: A cadaveric feasibility study

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