863 results match your criteria Journal of Artificial Organs[Journal]


Evaluation of graft anastomosis using time-intensity curves and quantitative near-infrared fluorescence angiography during peripheral arterial bypass grafting.

J Artif Organs 2018 Nov 22. Epub 2018 Nov 22.

Department of Operating Management, Kochi Medical School, Kochi University, Kohasu Oko-cho 185-1, Nankoku, Kochi, 783-8505, Japan.

Near-infrared fluorescence angiography (NIR) visualizes blood perfusion using the fluorescence property of indocyanine green (ICG). This study aimed to retrospectively determine the usefulness of a quantitative analysis using NIR to predict the patency of peripheral arterial bypass grafts by measuring their fluorescence luminance intensities (FLIs).Thirteen grafts in 11 patients who underwent peripheral arterial bypass grafting were divided into a patent graft group (n = 7) and a failed graft group (n = 6). Read More

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http://dx.doi.org/10.1007/s10047-018-1083-9DOI Listing
November 2018
2 Reads

Mechanical properties of a new thermally deformable mitral valve annuloplasty ring and its effects on the mitral valve.

J Artif Organs 2018 Nov 19. Epub 2018 Nov 19.

Department of Cardiovascular and Thoracic Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Kita 15, Nishi 7, Kita-ku, Sapporo, 060-8638, Japan.

Ideally, an annuloplasty ring's shape should be changed intraoperatively if mitral valve repair is unsuccessful because of a short coaptation length or systolic anterior motion. Several post-implantation adjustable rings have been developed, but they are not freely deformable and are unsuitable for asymmetric repair of the valvular annulus. We developed a novel thermally deformable mitral annuloplasty ring to address these problems and assessed the ring's mechanical properties and its effect on the mitral valve anatomy. Read More

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http://dx.doi.org/10.1007/s10047-018-1084-8DOI Listing
November 2018
12 Reads

Glucose control using a closed-loop device decreases inflammation after cardiovascular surgery without increasing hypoglycemia risk.

J Artif Organs 2018 Nov 19. Epub 2018 Nov 19.

Department of Anesthesiology and Intensive Care Medicine, Kochi Medical School, Kohasu, Oko-cho, Nankoku, Kochi, 783-8505, Japan.

Although tight glucose control might reduce inflammation after cardiac surgery, it remains unclear whether inflammation can be controlled by maintaining glucose levels within 110-180 mg/dL. We hypothesized that a glucose target range of 110-180 mg/dL decreases inflammation after cardiovascular surgery. This retrospective study included 72 cardiovascular surgery patients divided into two groups according to the glucose control approach. Read More

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http://dx.doi.org/10.1007/s10047-018-1082-xDOI Listing
November 2018
4 Reads

Long-term maintenance of hemoglobin levels in hemodialysis patients treated with bi-weekly epoetin beta pegol switched from darbepoetin alfa: a single-center, 12-month observational study in Japan.

J Artif Organs 2018 Nov 14. Epub 2018 Nov 14.

Department of Nephrology, Hiroshima University Hospital, Hiroshima, Japan.

Recent evidence on maintenance administration of epoetin beta pegol, a continuous erythropoiesis receptor activator (CERA), in dialysis patients shows the clinical benefit of bi-weekly administration (Q2W) in improving hematopoiesis and iron use efficiency. We undertook a single-center observational study of 33 Japanese maintenance dialysis patients, whose anemia had been kept stable through weekly administration (Q1W) of darbepoetin (DA), to evaluate the effectiveness of CERA Q2W switched from DA in maintaining hemoglobin (Hb) levels over a 12-month period. The target Hb level was 10. Read More

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http://link.springer.com/10.1007/s10047-018-1080-z
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http://dx.doi.org/10.1007/s10047-018-1080-zDOI Listing
November 2018
6 Reads

Maintaining lower limb access with the HeRO device.

J Artif Organs 2018 Nov 7. Epub 2018 Nov 7.

Department of Radiology, Queen Elizabeth University Hospital, Glasgow, UK.

Central venous catheters (CVC) remain a mainstay of vascular access particularly for incident patients,
but lead to central vein stenosis (CVS) in up to 1 in 6 patents. This often leads to establishing dialysis access in the groin which in turn may result in development of CVS in the lower body, although this is poorly reported. The HeRO device was designed to address CVS by bypassing the stenosed veins with a nitinol-reinforced silicone tube into the right atrium, which acts as an outflow conduit attached to an arterial inflow. Read More

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http://dx.doi.org/10.1007/s10047-018-1079-5DOI Listing
November 2018
1 Read

Left ventricular assist device-related infections: does the time of onset matter?

J Artif Organs 2018 Nov 2. Epub 2018 Nov 2.

Division of Cardiology, Gill Heart Institute, University of Kentucky, 900 South Limestone Street, Lexington, KY, 40507, USA.

A frequent complication of left ventricular assist devices (LVAD) is the LVAD-associated infections (LVADIs). Contamination may occur during initial surgery/admission or at a later time. We studied the clinical manifestations and outcomes of LVADIs depending on the time of the onset. Read More

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http://link.springer.com/10.1007/s10047-018-1078-6
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http://dx.doi.org/10.1007/s10047-018-1078-6DOI Listing
November 2018
6 Reads

Mid- to long-term results of resurfacing hip arthroplasty in Japanese patients: a comparison of osteoarthritic vs non-osteoarthritic patients.

J Artif Organs 2018 Oct 28. Epub 2018 Oct 28.

Department of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa University, 13-1 Takaramachi, Kanazawa, Ishikawa, 920-8641, Japan.

Past reports showed good mid-term results of RHA for Japanese patients. However, few reports have compared the mid- to long-term results for RHA in Japanese patients with and without osteoarthritis. Therefore, this study investigated the mid- to long-term results of RHA in Japanese patients with osteoarthritis compared to those without. Read More

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http://link.springer.com/10.1007/s10047-018-1077-7
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http://dx.doi.org/10.1007/s10047-018-1077-7DOI Listing
October 2018
4 Reads

Effect of concomitant mitral valve procedures for severe mitral regurgitation during left ventricular assist device implantation.

J Artif Organs 2018 Oct 25. Epub 2018 Oct 25.

Division of Cardiothoracic Transplantation and Circulatory Support, Baylor College of Medicine, Houston, TX, USA.

The effect of performing a concomitant mitral valve procedure (MVP) during continuous-flow left ventricular assist device (CF-LVAD) implantation has been reported for patients with moderate-to-severe mitral regurgitation (MR), but moderate MR is less of a clinical concern for CF-LVAD patients. There is a paucity of reports focusing on patients with severe MR. Thus, the purpose of this study was to analyze the effect of performing a concomitant MVP during CF-LVAD implantation in patients with severe preoperative MR. Read More

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http://link.springer.com/10.1007/s10047-018-1076-8
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http://dx.doi.org/10.1007/s10047-018-1076-8DOI Listing
October 2018
4 Reads

Omental and deep inferior epigastric artery perforator flap coverage after heart transplantation to manage wide left ventricular assist device exposure with pocket infection.

J Artif Organs 2018 Dec 22;21(4):466-470. Epub 2018 Oct 22.

Department of Cardiovascular Surgery, Graduate School of Medicine, Kyushu University, Fukuoka, Japan.

Infection is a serious potential complication after left ventricular assist device (LVAD) implantation. In general, infection of the device pocket, with device exposure, should be managed by early device removal and heart transplantation. However, because of the small number of donors in Japan, accelerating access to heart transplantation is often difficult and the LVAD can be widely exposed during the waiting period. Read More

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http://link.springer.com/10.1007/s10047-018-1075-9
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http://dx.doi.org/10.1007/s10047-018-1075-9DOI Listing
December 2018
7 Reads

Shape optimization of a centrifugal blood pump by coupling CFD with metamodel-assisted genetic algorithm.

J Artif Organs 2018 Oct 11. Epub 2018 Oct 11.

Rajaie Cardiovascular, Medical and Research Center, Tehran, Iran.

A centrifugal blood pump is a common type of pump used as a left ventricular assist device in the medical industries. Therefore, the improvement of the device bio-compatibility to reduce the blood damage and to increase the efficiency has become a major challenge. In the current work, a metamodel-assisted genetic algorithm is employed to simultaneously optimize the impeller and volute geometries of a typical centrifugal blood pump. Read More

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http://link.springer.com/10.1007/s10047-018-1072-z
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http://dx.doi.org/10.1007/s10047-018-1072-zDOI Listing
October 2018
4 Reads

Clinical results and medical costs of thoracic endovascular aortic repair in patients over 80 years of age.

J Artif Organs 2018 Oct 11. Epub 2018 Oct 11.

Department of Cardiovascular Surgery, Chiba Graduate School of Medicine, 1-8-1 Inohana, Chuou, Chiba city, Chiba, 260-8670, Japan.

Thoracic endovascular aortic repair (TEVAR) is expected to be minimally invasive, especially in older patients. However, clinical results of TEVAR in octogenarians including medical costs are limited. Between 2010 and 2016, a total of 57 patients over 80 years of age (mean age 84. Read More

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http://link.springer.com/10.1007/s10047-018-1073-y
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http://dx.doi.org/10.1007/s10047-018-1073-yDOI Listing
October 2018
3 Reads

Driveline angle is crucial for preventing driveline infection in patients with HeartMate II device.

J Artif Organs 2018 Oct 8. Epub 2018 Oct 8.

Department of Cardiovascular Surgery, National Cerebral and Cardiovascular Center, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565, Japan.

We hypothesized that the externalizing direction of the driveline (the driveline angle) at the percutaneous exit site would influence the occurrence of driveline infection after left ventricular assist device implantation. From August 2013 to May 2017, 71 patients were implanted with a HeartMate II device in our center. The driveline angle was measured on anteroposterior radiography just after implantation. Read More

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http://link.springer.com/10.1007/s10047-018-1074-x
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http://dx.doi.org/10.1007/s10047-018-1074-xDOI Listing
October 2018
1 Read

Venovenous extracorporeal membrane oxygenation for the management of critical airway stenosis.

J Artif Organs 2018 Dec 5;21(4):479-481. Epub 2018 Oct 5.

Department of Critical Care Medicine, Sakai City Medical Center, Ebaraji-cho 1-1-1, Nishi-ku, Sakai, Osaka, 593-8304, Japan.

Venovenous extracorporeal membrane oxygenation (VV-ECMO) is used not only support gas transfer of patients suffering from respiratory failure, but also to manage hypoxic patients with critical airway obstruction during various procedures. We present a case in which we electively used VV-ECMO to facilitate tube placement and tracheal biopsy in a 67-year-old female with critical tracheal stenosis. The patient was transferred to our hospital for a surgical treatment after emergent tracheostomy for postoperative management of cerebral hemorrhage in right putamen. Read More

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http://link.springer.com/10.1007/s10047-018-1070-1
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http://dx.doi.org/10.1007/s10047-018-1070-1DOI Listing
December 2018
9 Reads

Rolipram plus Sivelestat inhibits bone marrow-derived leukocytic lung recruitment after cardiopulmonary bypass in a primate model.

J Artif Organs 2018 Oct 3. Epub 2018 Oct 3.

Department of Thoracic Surgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8575, Japan.

Cardiopulmonary bypass (CPB) recovery is complicated by lung inflammation from bone marrow (BM)-derived polymorphonuclear leukocytes (PMNs) and monocytes (MO). Although Sivelestat reduces inflammatory mediators and Rolipram inhibits PMN and MO activation, any kinetic effects to improve CPB recovery in vivo are unknown. We hypothesized that intraoperative co-administration of these compounds would reduce CPB-induced lung inflammation through downregulation of PMN and MO recruitment. Read More

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http://dx.doi.org/10.1007/s10047-018-1071-0DOI Listing
October 2018

Minimal-flow ECCOR in patients needing CRRT does not facilitate lung-protective ventilation.

J Artif Organs 2018 Oct 3. Epub 2018 Oct 3.

Department of Anaesthesiology, Emergency and Intensive Care Medicine, University of Göttingen Medical Center, Göttingen, Germany Robert-Koch-Str. 40, 37099, Göttingen, Germany.

Extracorporeal CO removal (ECCOR) is intended to facilitate lung protective ventilation in patients with hypercarbia. The combination of continuous renal replacement therapy (CRRT) and minimal-flow ECCOR offers a promising concept for patients in need of both. We hypothecated that this system is able to remove enough CO to facilitate lung protective ventilation in mechanically ventilated patients. Read More

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http://link.springer.com/10.1007/s10047-018-1068-8
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http://dx.doi.org/10.1007/s10047-018-1068-8DOI Listing
October 2018
11 Reads

Differences in activities of daily living after hip arthroplasty among hip resurfacing, anterolateral THA, and posterolateral THA: a propensity score matched analysis.

J Artif Organs 2018 Sep 24. Epub 2018 Sep 24.

Department of Orthopaedic Medical Engineering, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, 565-0871, Japan.

The aim was to elucidate the differences in activities of daily living (ADL) after hip arthroplasty among hip resurfacing (HRA), anterolateral total hip arthroplasty (AL-THA), and posterolateral THA (PL-THA) patients after age, sex, body mass index, bilateral/unilateral hip arthroplasty, and postoperative duration were matched using propensity scores. A total of 673 hips from 540 consecutive patients who underwent hip arthroplasty were included. A self-completed questionnaire on preoperative and postoperative ADLs was administered during postsurgical visits at least ≥ 4 years postoperatively. Read More

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http://dx.doi.org/10.1007/s10047-018-1069-7DOI Listing
September 2018
1 Read

A systematic review of effectiveness and economic evaluation of Cardiohelp and portable devices for extracorporeal membrane oxygenation (ECMO).

J Artif Organs 2018 Sep 5. Epub 2018 Sep 5.

Research Center for Evidence-Based Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.

In recent years, there have been substantial advancements in the development of different technologies for extracorporeal membrane oxygenation (ECMO) for in-hospital and out of hospital applications. However the effectiveness of these devices is not clearly known. The objective of this study was to evaluate the cost-effectiveness of Cardiohelp compared to other portable ECMO devices. Read More

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http://dx.doi.org/10.1007/s10047-018-1067-9DOI Listing
September 2018
4 Reads

Histological investigation of the titanium fiber mesh with one side sealed with non-porous material for its application to the artificial heart system.

J Artif Organs 2018 Dec 20;21(4):486-490. Epub 2018 Aug 20.

Graduate School of Science and Engineering, Tokai University, Minami-sawa 5-1-1-1, Minami-ku, Sapporo, 005-8601, Japan.

In this study, we investigated tissue-inducing characteristics of a titanium fiber mesh disk with one surface sealed with a non-porous material. We used sintered titanium fiber mesh (Hi-Lex Co., Zellez™, Hyogo, Japan) having a titanium fiber diameter of 50 µm and volumetric porosity of the titanium fiber mesh of 87% with an average pore size of 200 µm. Read More

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http://dx.doi.org/10.1007/s10047-018-1066-xDOI Listing
December 2018
1 Read

Interhospital transport of ARDS patients on extracorporeal membrane oxygenation.

J Artif Organs 2018 Aug 18. Epub 2018 Aug 18.

Department of Anesthesiology, Intensive Care Medicine, Emergency Medicine and Pain Management, University Medical Center Göttingen, Göttingen, Germany.

Veno-venous extracorporeal membrane oxygenation (ECMO) can be a lifesaving therapy for patients with severe acute respiratory distress syndrome (ARDS). ECMO is a technically complex and challenging procedure and should therefore only be performed in specialized centers. Transporting ARDS patients to ECMO centers for treatment can be dangerous because of the risk of hypoxemia during transport. Read More

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http://dx.doi.org/10.1007/s10047-018-1065-yDOI Listing
August 2018
1 Read

Oxygen consumption during hypothermic and subnormothermic machine perfusions of porcine liver grafts after cardiac death.

J Artif Organs 2018 Dec 25;21(4):450-457. Epub 2018 Jul 25.

Department of Surgery, Asahikawa Medical University, Asahikawa, Hokkaido, Japan.

The use of grafts donated after cardiac death (DCD) would greatly contribute to the expansion of the donor organ pool. Machine perfusion (MP) is a promising technology to improve DCD liver grafts. Several perfusion technologies under various temperature and oxygenation conditions have been suggested and are still debated. Read More

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http://dx.doi.org/10.1007/s10047-018-1063-0DOI Listing
December 2018
1 Read

Thrombogenicity and long-term cytokine removal capability of a novel asymmetric triacetate membrane hemofilter.

J Artif Organs 2018 Dec 24;21(4):435-442. Epub 2018 Jul 24.

Extracorporeal Immunomodulation Unit, Fraunhofer Institute for Cell Therapy and Immunology, Schillingallee 68, Room 1.06, 18057, Rostock, Germany.

Hemofilters applied in continuous renal replacement therapies (CRRTs) for the treatment of acute kidney injury must meet high standards in biocompatibility and permeability for middle and large molecules over extended treatment times. In general, cellulose-based membranes exhibit good biocompatibility and low fouling, and thus appear to be beneficial for CRRT. In this in vitro study, we compared a novel asymmetric cellulose triacetate (ATA) membrane with three synthetic membranes [polysulfone (PS), polyethersulfone (PES), and polyethylenimine-treated acrylonitrile/sodium methallyl sulfonate copolymer (AN69 ST)] regarding thrombogenicity and cytokine removal. Read More

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http://dx.doi.org/10.1007/s10047-018-1062-1DOI Listing
December 2018
1 Read

Continuous hemofiltration model using porcine blood for comparing filter life.

J Artif Organs 2018 Sep 24;21(3):332-339. Epub 2018 Jul 24.

Kitasato University Graduate School of Medical Sciences, Kanagawa, Japan.

The purpose of the present study was to establish a continuous hemofiltration model using porcine blood to compare filter life. Continuous hemofiltration (CHF) experiments were performed using an in vitro hemofilter evaluation system utilizing porcine blood containing trisodium citrate in addition to nafamostat mesilate as anticoagulants. The lifetime of the hemofilter was evaluated using the transmembrane pressure and the pressure drop across the hemofilter at varying trisodium citrate concentrations. Read More

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http://dx.doi.org/10.1007/s10047-018-1060-3DOI Listing
September 2018
1 Read

The angle of the outflow graft to the aorta can affect recirculation due to aortic insufficiency under left ventricular assist device support.

J Artif Organs 2018 Dec 23;21(4):399-404. Epub 2018 Jul 23.

Department of Artificial Organs, National Cerebral and Cardiovascular Center Research Institute, Osaka, Japan.

Aortic insufficiency (AI) is a crucial complication during continuous-flow left ventricular assist device (LVAD) support. Our previous clinical study suggested that a larger angle between the outflow graft and the aorta (O-A angle) could cause AI progression. This study examined the effect of the O-A angle on the hemodynamics of AI under LVAD support in an acute animal experimental model. Read More

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http://link.springer.com/10.1007/s10047-018-1064-z
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http://dx.doi.org/10.1007/s10047-018-1064-zDOI Listing
December 2018
7 Reads

Correction to: Cerebral oximetry for cardiac surgery: a preoperative comparison of device characteristics and pitfalls in interpretation.

J Artif Organs 2018 Dec;21(4):419

Department of Cardiovascular Surgery, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami, Sagamihara, Kanagawa, 252-0375, Japan.

In the original publication, the length unit of the SCD in Table 1 and Fig. 2 has been incorrectly published as cm. The correct length unit is mm. Read More

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http://dx.doi.org/10.1007/s10047-018-1061-2DOI Listing
December 2018
2 Reads

The biocompatibility and bioactivity of hemodialysis membranes: their impact in end-stage renal disease.

J Artif Organs 2018 Jul 14. Epub 2018 Jul 14.

Department of Chemical Sciences, Faculty of Pharmacy, LAQV-REQUIMTE, University of Porto, Rua de Jorge Viterbo Ferreira nº. 228, 450-313, Porto, Portugal.

End-stage renal disease is a growing health problem with increasing prevalence and high health care costs. Patients suffering from end-stage renal disease exhibit higher morbidity and mortality rates compared to the general population. These patients, who are treated using hemodialysis, typically suffer from anemia, inflammation, and oxidative stress. Read More

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http://dx.doi.org/10.1007/s10047-018-1059-9DOI Listing
July 2018
1 Read

Efficient CO removal using extracorporeal lung and renal assist device.

J Artif Organs 2018 Dec 6;21(4):427-434. Epub 2018 Jul 6.

Department of Emergency and Critical Care Medicine, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo, Chiba, 260-8677, Japan.

We developed a novel system comprising acid infusion, membrane lung, and a continuous renal replacement therapy console for efficient CO removal at a low blood flow. To evaluate the new system, we used an ex vivo experimental model using swine blood. A liter of aliquoted blood adjusted to pH 7. Read More

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http://dx.doi.org/10.1007/s10047-018-1058-xDOI Listing
December 2018
11 Reads

Risk analysis using the prognostic nutritional index in hemodialysis-dependent patients undergoing cardiac surgery.

J Artif Organs 2018 Dec 27;21(4):443-449. Epub 2018 Jun 27.

Department of Cardiovascular Surgery, Jichi Medical University, Yakushiji 3311-1, Shimotsuke, Tochigi, 329-0498, Japan.

The prognostic nutritional index is an effective prognostic tool used in gastrointestinal surgeries. However, its value has not been verified in cardiovascular surgeries. This study aimed to investigate its utility in hemodialysis-dependent patients undergoing cardiac surgery. Read More

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http://dx.doi.org/10.1007/s10047-018-1056-zDOI Listing
December 2018
1 Read

Effect of obesity on outcomes in patients who undergo implantation of a continuous-flow left ventricular assist device.

J Artif Organs 2018 Sep 27;21(3):397. Epub 2018 Jun 27.

Division of Cardiothoracic Transplant and Assist Devices, Baylor College of Medicine, Houston, TX, USA.

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http://dx.doi.org/10.1007/s10047-018-1054-1DOI Listing
September 2018
5 Reads

Single-center experience of the bridge-to-bridge strategy using the Nipro paracorporeal ventricular assist device.

J Artif Organs 2018 Dec 25;21(4):405-411. Epub 2018 Jun 25.

Department of Cardiac Surgery, Department of Cooperative Unit of Medicine and Engineering Research, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8655, Japan.

Currently, we use the Nipro paracorporeal VAD (p-VAD) for initial short-term ventricular support, as a bridge to decision (BTD) or a bridge to candidacy (BTC) treatment, in Interagency Registry for Mechanically Assisted Circulatory Support (INTERMACS) levels 1 and 2 patients. However, it is possible that compared to patients with primary implantable-VADs (P-iVAD), the bridge-to-bridge (BTB) patients are more likely to develop complications. This retrospective study used data from 24 consecutive BTB patients who were initially implanted with Nipro p-VAD as BTD or BTC treatments between April 2011 and March 2016, and subsequently underwent conversion to an i-VAD. Read More

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http://dx.doi.org/10.1007/s10047-018-1053-2DOI Listing
December 2018
1 Read

Efficacy of regional saturation of oxygen monitor using near-infrared spectroscopy for lower limb ischemia during minimally invasive cardiac surgery.

J Artif Organs 2018 Jun 25. Epub 2018 Jun 25.

Department of Cardiac Surgery, National Cerebral and Cardiovascular Center, 5-7-1 Fujishirodai, Suita, Osaka, 565-8565, Japan.

Lower limb ischemia with an occlusive cannula is a potential complication of minimally invasive cardiac surgery (MICS). We evaluated intraoperative local oxygen supply-demand balance by monitoring regional saturation of oxygen (rSO) using near-infrared spectroscopy (NIRS), and analyzed the correlation between cannula size and fluctuation range of rSO. Fifty-four patients undergoing MICS surgery using femoral artery cannulation from April 2015 to August 2016 were enrolled. Read More

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http://dx.doi.org/10.1007/s10047-018-1057-yDOI Listing
June 2018
8 Reads

Left ventricular assist device implantation after plasma exchange for heparin-induced thrombocytopenia.

J Artif Organs 2018 Jun 25. Epub 2018 Jun 25.

Department of Cardiovascular Surgery, Chiba University Graduate School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, 260-0856, Japan.

Treating a patient with heparin-induced thrombocytopenia can be challenging particularly when the patient requires urgent cardiac surgery that uses heparin for anticoagulation. We herein report a case of a 61-year-old man with idiopathic dilated cardiomyopathy associated with heparin-induced thrombocytopenia and who underwent plasma exchange to remove heparin-induced thrombocytopenia antibodies before undergoing left ventricular assist device implantation. The surgery was performed using cardiopulmonary bypass and unfractionated heparin. Read More

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http://dx.doi.org/10.1007/s10047-018-1055-0DOI Listing
June 2018
1 Read

Cerebral oximetry for cardiac surgery: a preoperative comparison of device characteristics and pitfalls in interpretation.

J Artif Organs 2018 Dec 20;21(4):412-418. Epub 2018 Jun 20.

Department of Cardiovascular Surgery, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami, Sagamihara, Kanagawa, 252-0375, Japan.

Regional cerebral oximetry using near-infrared spectroscopy devices is commonly used for detecting cerebral ischemia during cardiopulmonary bypass, and aim to avoid poor cerebral perfusion which may result in perioperative neurological impairment. Today, several devices that can detect cerebral ischemia are commercially available. Although these devices operate on the same measurement principles, their algorithms for detecting and calculating cerebral ischemia are different and no criteria for directly comparing values measured by such different devices exist. Read More

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http://dx.doi.org/10.1007/s10047-018-1052-3DOI Listing
December 2018
30 Reads

Rapid-onset plasma leakage of extracorporeal oxygenation membranes possibly due to hyperbilirubinemia.

J Artif Organs 2018 Dec 2;21(4):475-478. Epub 2018 Jun 2.

Department of Emergency and Critical Care Medicine, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.

Extracorporeal membrane oxygenation (ECMO) is an emerging tool for supporting cardiopulmonary function in patients with cardiorespiratory failure or arrest. The oxygenator of the ECMO circuit requires effective oxygenation and removal of carbon dioxide from the blood. Major problems that can occur with the oxygenator include plasma leakage, one of the late-onset serious complications necessitating device replacement. Read More

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http://dx.doi.org/10.1007/s10047-018-1051-4DOI Listing
December 2018
11 Reads

HeartMate II implantation technique that spares the sternum and ascending aorta.

J Artif Organs 2018 Dec 21;21(4):458-461. Epub 2018 May 21.

Division of Cardiothoracic Transplant and Assist Devices, Baylor College of Medicine, Houston, TX, USA.

Left ventricular assist devices (LVADs) have become the standard therapy for patients with end-stage heart failure, and the use of LVADs for long-term support has grown exponentially over the past decade. As the number of LVAD implantations has increased, surgeons have faced more challenging cases, such as those in which the patient has previously undergone a sternotomy. The HeartMate II is one of the most widely implanted LVADs. Read More

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http://dx.doi.org/10.1007/s10047-018-1049-yDOI Listing
December 2018
1 Read

Pregnancy complicated by influenza A ARDS requiring consecutive VV-ECMO treatment with successful vaginal delivery.

J Artif Organs 2018 Dec 17;21(4):471-474. Epub 2018 May 17.

Department of Intensive Internal Medicine, University Medical Center Ljubljana, Ljubljana, Slovenia.

A 29-year-old woman presented with influenza A ARDS at 23 weeks of gestation. Mechanical ventilation failed and VV-ECMO was started in a non-ECMO hospital. Transportation was performed on ECMO. Read More

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http://dx.doi.org/10.1007/s10047-018-1050-5DOI Listing
December 2018
3 Reads

Acute kidney injury after implantation of a left ventricular assist device: a comparison of axial-flow (HeartMate II) and centrifugal-flow (HeartWare HVAD) devices.

J Artif Organs 2018 May 15. Epub 2018 May 15.

Division of Cardiothoracic Transplantation and Circulatory Support, Baylor College of Medicine, 6720 Bertner Ave., Houston, TX, 77030, USA.

Continuous-flow left ventricular assist devices (CF-LVADs) are increasingly being used to treat advanced, refractory chronic heart failure. Herein, we sought to determine the incidence of postoperative acute kidney injury (AKI) in axial-flow (HeartMate II; HM-II) and centrifugal-flow (HVAD) CF-LVAD recipients, as well as the effect of AKI on mortality. The study cohort comprised 520 patients who received a HM-II (n = 398) or HVAD (n = 122) at our center between November 2003 and March 2016. Read More

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http://dx.doi.org/10.1007/s10047-018-1047-0DOI Listing
May 2018
3 Reads

Weaning from prolonged veno-venous extracorporeal membrane oxygenation (ECMO) after transfer to a specialized center: a retrospective study.

J Artif Organs 2018 May 15. Epub 2018 May 15.

Department of Internal Medicine V, Pneumology, Allergology, and Critical Care Medicine, Saarland University Medical Center, 66421, Homburg, Germany.

Veno-venous extracorporeal membrane oxygenation (vvECMO) is increasingly used as rescue therapy in severe respiratory failure. In patients with pre-existent lung diseases or persistent lung injury weaning from vvECMO can be challenging. This study sought to investigate outcomes of patients transferred to a specialized ECMO center after prolonged ECMO therapy. Read More

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http://dx.doi.org/10.1007/s10047-018-1046-1DOI Listing
May 2018
6 Reads

Lumbar muscle atrophy caused by harness replacement in a chronic calf model of total artificial heart implantation.

J Artif Organs 2018 May 14. Epub 2018 May 14.

Department of Biomedical Engineering, Lerner Research Institute, Cleveland Clinic, 9500 Euclid Avenue, Cleveland, OH, 44195, USA.

The postoperative care of animals implanted with mechanical circulatory support devices is complex. The standard of care requires continuous monitoring of hemodynamic parameters post implant, wound care, and maintenance of the animal's well-being, but also includes controlling the animal's biomechanics under conditions of continuous restraint and harnessing. In such studies, a harness provides secure fixation of the exteriorized device driveline and pressure lines and aids animal handling (lifting, position adjustment, and assistance with standing up). Read More

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http://link.springer.com/10.1007/s10047-018-1048-z
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http://dx.doi.org/10.1007/s10047-018-1048-zDOI Listing
May 2018
2 Reads

Comparison of tracheal reconstruction with allograft, fresh xenograft and artificial trachea scaffold in a rabbit model.

J Artif Organs 2018 May 12. Epub 2018 May 12.

Department of Mechanical Engineering, POSTECH, Pohang, 790-784, Republic of Korea.

This study evaluated the possibility of tracheal reconstruction with allograft, pig-to-rabbit fresh xenograft or use of a tissue-engineered trachea, and compared acute rejection of three different transplanted tracheal segments in rabbits. Eighteen healthy New Zealand White rabbits weighing 2.5-3. Read More

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http://dx.doi.org/10.1007/s10047-018-1045-2DOI Listing
May 2018
13 Reads

Immunoadsorption plasmapheresis treatment for the recurrent exacerbation of neuromyelitis optica spectrum disorder with a fluctuating anti-aquaporin-4 antibody level.

J Artif Organs 2018 Sep 19;21(3):378-382. Epub 2018 Apr 19.

Department of Urology, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan.

The pathogenesis in the exacerbation of neuromyelitis optica spectrum disorder (NMOSD) involves mainly the serum anti-aquaporin-4 (AQP4) immunoglobulin G antibody (anti-AQP4 antibody). If high-dose corticosteroid treatment is not achieved during remission, rescue plasmapheresis is recommended. However, there are few reports on the therapeutic efficacy of repetitive immunoadsorption plasmapheresis (IAPP) for the recurrent exacerbation of NMOSD with a fluctuating anti-AQP4 antibody level. Read More

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http://dx.doi.org/10.1007/s10047-018-1044-3DOI Listing
September 2018
1 Read

Sleep and self-care correlates before and after implantation of a left-ventricular assist device (LVAD).

J Artif Organs 2018 Sep 13;21(3):278-284. Epub 2018 Apr 13.

University of Michigan School of Nursing, 400 North Ingalls Building Suite 4336, Ann Arbor, MI, 48109-2003, USA.

The impact of sleep on LVAD patients' self-care behaviors is unknown. This study examined the patterns and changes of patients sleep quality (SQ), daytime sleepiness (DS), instrumental activities of daily living (IADL), and self-care capability (SCC) before and after LVAD. In addition, the relationships among these variables were explored. Read More

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http://dx.doi.org/10.1007/s10047-018-1043-4DOI Listing
September 2018
3 Reads

Design of in situ porcine closed-circuit system for assessing blood-contacting biomaterials.

J Artif Organs 2018 Sep 11;21(3):317-324. Epub 2018 Apr 11.

Department of Biomedical Engineering, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, 565-8565, Japan.

The overall pre-clinical process of determining the blood compatibility of any medical device involves several stages. Although the primary purpose is to protect the patients, laboratory testing has been over-utilized for many years with a huge number of unnecessary animal tests being done routinely. Recently, the elimination of needless testing has become important in controlling the cost of healthcare and in addressing many issues related to the ethics of animal research. Read More

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http://dx.doi.org/10.1007/s10047-018-1042-5DOI Listing
September 2018
2 Reads

Effect of obesity on postoperative outcomes in patients with left ventricular assist device.

J Artif Organs 2018 Sep 7;21(3):396. Epub 2018 Apr 7.

Department of Cardiovascular Surgery, Izmir Ataturk Education and Research Hospital, Izmir, Turkey.

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http://dx.doi.org/10.1007/s10047-018-1038-1DOI Listing
September 2018
4 Reads

Correction to: Inhalative sedation with small tidal volumes under venovenous ECMO.

J Artif Organs 2018 Jun;21(2):206

BG Universitätsklinikum Bergmannsheil, Klinik und Poliklinik für Chirurgie, Bochum, Germany.

In the original publication, the affiliations of fourth and fifth authors were published incorrectly. The corrected affiliations are given in this correction. Read More

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http://dx.doi.org/10.1007/s10047-018-1040-7DOI Listing
June 2018
4 Reads

Anatomical study of the Cleveland Clinic continuous-flow total artificial heart in adult and pediatric configurations.

J Artif Organs 2018 Sep 3;21(3):383-386. Epub 2018 Apr 3.

R1 Engineering, Euclid, OH, USA.

The purpose of this study was to assess the smallest possible body sizes of patients in whom the Cleveland Clinic continuous-flow total artificial heart for adult (CFTAH) and pediatric configurations (P-CFTAH) can fit. One of the most critical dimensions is the vertebra-to-sternum distance at the junction of the right atrium to the inferior vena cava (V-S distance). Our previous CFTAH anatomical fitting study suggested that the CFTAH would fit patients of V-S distance ≥ 7. Read More

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http://dx.doi.org/10.1007/s10047-018-1039-0DOI Listing
September 2018
2 Reads

Effect of improved navigation performance on the accuracy of implant placement in total hip arthroplasty with a CT-based navigation system.

J Artif Organs 2018 Sep 2;21(3):340-347. Epub 2018 Apr 2.

Department of Orthopaedic Surgery, Osaka National Hospital, 2-1-14 oenzaka, Chuo-ku, Osaka, 5400006, Japan.

A computed tomography (CT)-based navigation system is one of the support tools to place implant with appropriate alignment and position in total hip arthroplasty (THA). To determine whether the higher performance of the navigation would further improve the accuracy of implant placement in the clinical setting, we retrospectively compared the navigation accuracy of two different versions of a navigation system. The newer version of the navigation system had an upgraded optical sensor with superior positional accuracy. Read More

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http://dx.doi.org/10.1007/s10047-018-1041-6DOI Listing
September 2018
2 Reads

Wall thickness control in biotubes prepared using type-C mold.

J Artif Organs 2018 Sep 30;21(3):387-391. Epub 2018 Mar 30.

Department of Artificial Organs, National Cerebral and Cardiovascular Center Research Institute, Fujishiro-dai 5-7-1, Suita, Osaka, 565-8565, Japan.

A type-C mold based on in-body tissue architecture was previously developed for preparing small-diameter biotube vascular grafts with a 2-mm diameter and approximately 1-mm wall thickness. In this study, the type-C mold was modified for preparing large-diameter biotubes with controlled wall thicknesses. Four types of molds were assembled by inserting silicone center rods (outer diameters 11, 13, 15, 17 mm) into stainless steel cages (inner diameter 19 mm) and surgically embedded in the abdominal subcutaneous pouches of Holstein cows. Read More

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http://dx.doi.org/10.1007/s10047-018-1035-4DOI Listing
September 2018
31 Reads

Exogenous surfactant as a bridge to prolonged "total lung rest" in severely injured patient during extracorporeal membrane oxygenation.

J Artif Organs 2018 Sep 27;21(3):374-377. Epub 2018 Mar 27.

Department of Anesthesiology and Intensive Care Medicine, University Hospital Ostrava, 17. listopadu 1790, 708 52, Ostrava, Czech Republic.

We report a case of a 20-year-old male patient suffering from motorcycle accident complicated by rapid development of severe refractory hypoxemia and hypercapnia due to serious bilateral lung contusions and lacerations. Positive pressure mechanical ventilation induced pressure-dependent massive air leak from disrupted pulmonary tissue. Simultaneous implementation of veno-venous extracorporeal membrane oxygenation together with surfactant application allowed prolonged disconnection of patient from mechanical ventilation ("total lung rest" mode). Read More

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http://dx.doi.org/10.1007/s10047-018-1037-2DOI Listing
September 2018
4 Reads

Extracorporeal life support for immune reconstitution inflammatory syndrome in HIV patients with Pneumocystis jirovecii pneumonia.

J Artif Organs 2018 Sep 24;21(3):371-373. Epub 2018 Mar 24.

Department of Cardiothoracic and Vascular Surgery, National University Hospital, 1 E Kent Ridge road, NUHS Tower Block, Level 9, Singapore, 119228, Singapore.

Patients with immunosuppression from human immunodeficiency virus (HIV) have been traditionally considered poor candidates for extracorporeal membrane oxygenation (ECMO) because of high in-hospital mortality and poor long-term survival. Highly active antiretroviral therapy (HAART) has improved survival rates in compliant HIV patients and reversible severe respiratory failure may warrant ECMO in this group. Immune reconstitution inflammatory syndrome (IRIS) involves excessive inflammatory response to a pathogen with paradoxical clinical deterioration following HAART initiation and may present as severe respiratory failure. Read More

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http://dx.doi.org/10.1007/s10047-018-1036-3DOI Listing
September 2018
2 Reads

To what extent can 3D model replicate dimensions of individual mitral valve prolapse?

J Artif Organs 2018 Sep 19;21(3):348-355. Epub 2018 Mar 19.

Department of Cardiovascular Surgery, Osaka University Graduate School of Medicine, Osaka, Japan.

Determining the complex geometry of mitral valve prolapse is often difficult. We constructed 3D models of six prolapsed mitral valves for surgical assessment, and evaluated how accurately the models could replicate individual valve dimensions. 3D polygon data were constructed based on an original segmentation method for computed tomography images. Read More

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http://dx.doi.org/10.1007/s10047-018-1033-6DOI Listing
September 2018
2 Reads