Abstract:
:The most common method of controlling acidemia during lung-protective ventilation is CO₂ removal with an extracorporeal lung assist (ECLA) system. Another possibility to prevent acidemia is based on intravenous (i.v.) application of tris-hydroxymethyl-aminomethane (3 mol/L, THAM) buffer, which can bind hydrogen protons and which can be removed from the body via renal replacement therapy (RRT). We investigated whether RRT combined with predilutional (prefilter) THAM-application provides an alternative to ECLA for a rescue situation. For this, anesthetized pigs, 40 kg of body weight, six animals per group, underwent 5 h of acidemia (pH 7.19-7.24) induced by acid infusion and permissive hypercapnia (low tidal volume ventilation, PaCO₂ 80-90 mmHg). Isovolemic, high-volume hemofiltration (HVHF) was operated with predilutional THAM-infusion for treatment. To evaluate adverse effects of this approach, we set up further groups: HVHF with postdilutional (post-filter) THAM-application; i.v.-THAM without HVHF; normal pH homeostasis with HVHF. Acid-base parameters, hemodynamics, renal function, and lung morphology were investigated. HVHF with predilutional THAM-infusion of 8 mmol/kg/h allowed fast pH normalization, significant reduction in PaCO₂ to 56 mmHg and tolerable hemodynamics. HVHF alone or lower dose i.v. THAM (2 mmol/kg/h) failed to produce a comparable result. A postdilutional THAM infusion reduced hemodynamic tolerability and increased lung edema formation. HVHF in pigs with normal acid-base status resulted in a decreased base excess and urine acidification. In conclusion, predilutional THAM-application and HVHF corrected the acid-base disorder and improved pulmonary hemodynamics. Further studies are necessary to optimize the protocol including the dosage.
journal_name
Artif Organsjournal_title
Artificial organsauthors
Russ M,Deja M,Ott S,Bedarf J,Keckel T,Hiebl B,Wagner JJ,Unger JKdoi
10.1111/j.1525-1594.2011.01204.xsubject
Has Abstractpub_date
2011-06-01 00:00:00pages
E108-18issue
6eissn
0160-564Xissn
1525-1594journal_volume
35pub_type
杂志文章abstract::Microcapsules containing insulin crystals or islets of Langerhans were made by extruding a mixture of insulin crystals or islets and sodium alginate into a calcium chloride solution, and then coating it with poly-l-lysine. When these microcapsules were incubated at 37 degrees C, insulin could be detected readily in th...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.1983.tb04187.x
更新日期:1983-05-01 00:00:00
abstract::The existence of acquired von Willebrand syndrome (AVWS) in patients with continuous flow left ventricular assist devices (LVADs) is well documented and has been verified by numerous investigators. AVWS has not been observed to occur in pulsatile devices such as the SynCardia total artificial heart (TAH), the HeartMat...
journal_title:Artificial organs
pub_type: 杂志文章,评审
doi:10.1111/aor.13291
更新日期:2018-12-01 00:00:00
abstract::We have developed a novel method to simultaneously evaluate thromboresistance of two different types of drip chambers with a filter used in extracorporeal blood circuits for hemodialysis using canine arteriovenous shunt models. Bilateral bypasses between the femoral artery and vein on both sides of the animal were for...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.1997.tb00354.x
更新日期:1997-02-01 00:00:00
abstract::Patients with end-stage renal failure and peripheral vascular disease pose a difficult management problem in establishing long-term angioaccess for hemodialysis. In 4 patients with access problems, we created axillary artery to contralateral axillary vein Goretex grafts. The grafts were cannulated regularly for period...
journal_title:Artificial organs
pub_type: 临床试验,杂志文章
doi:10.1111/j.1525-1594.1995.tb02291.x
更新日期:1995-12-01 00:00:00
abstract::Low molecular weight heparin (LMH) acts as an anticoagulation agent mainly through its anti-activated coagulation factor X (Xa) activity. Thrombelastography (TEG) is expected to be useful to monitor the dosage of LMH during hemodialysis because reaction time on TEG (TEG-r) is considered to reflect blood thromboplastin...
journal_title:Artificial organs
pub_type: 临床试验,杂志文章
doi:10.1111/j.1525-1594.1990.tb02996.x
更新日期:1990-12-01 00:00:00
abstract::The heparin-conjugated fibrin (HCF) system has been developed to deliver bone morphogenetic proteins (BMPs) for a long-term period and thus enhance bone regeneration. In the present study, we tested the effectiveness of the delivery system for spinal fusion with a very low dose of BMP-2. A total of 15 rabbits underwen...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2012.01578.x
更新日期:2013-05-01 00:00:00
abstract::Cardiac monitoring of ventricular assist devices (VADs) is important for detecting heart failure risks, such as critical arrhythmia and ventricular fibrillation, and for supplying data that are useful for hemodynamic control. Specifically, impedance cardiograms (ICGs) are especially beneficial because they have no eff...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2011.01381.x
更新日期:2012-05-01 00:00:00
abstract::Although current continuous-flow total artificial hearts (CFTAHs) are much smaller than previous models, venous kinking may still occur after device implantation, especially in smaller animals. By inserting a self-expanding stent at the site of venous narrowing in a sheep model implanted with a CFTAH, we were able to ...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2011.01233.x
更新日期:2011-07-01 00:00:00
abstract::Ten dialysis patients were followed in a prospective study to determine the neurotoxicity of metabolites in the middle molecule (MM) molecular weight (mol wt) range of 500-200 daltons/molecule. In the absence of readily available direct serum measurements of MM concentrations, a theoretically calculated dialysis index...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.1978.tb01002.x
更新日期:1978-02-01 00:00:00
abstract::The PI3K/Akt signaling pathway has been implicated in playing an important role in platelet activation during hemostasis and thrombosis involving platelet-matrix interaction and platelet aggregation. Its role in non-physiological shear stress (NPSS)-induced platelet activation relevant to high-shear blood contacting m...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/aor.13465
更新日期:2019-09-01 00:00:00
abstract::To elucidate the precise mechanism of carpal tunnel syndrome (CTS), serum hyaluronic acid (HA), interleukin-1 beta (IL-1 beta), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-alpha) were measured in 71 chronic hemodialysis patients with or without CTS and/or shoulder pain. Patients were divided into two gr...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.1994.tb02227.x
更新日期:1994-06-01 00:00:00
abstract::Magnevad II is an improved version of Magnevad I and both are fourth-generation axial flow left ventricular assist devices. A major simplification has been implemented and tested. Magnevad I used a magnetically suspended rotor requiring active axial control. Magnevad II is completely passive but otherwise similar. A s...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2005.29113.x
更新日期:2005-10-01 00:00:00
abstract::The aim of this study was to investigate whether the use of a medically approved biodegradable scaffold as a solid support system would enhance graft survival following transplantation into the omental pouch in a preclinical large animal model. Six beagle dogs underwent total pancreatectomy followed by islet autotrans...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2008.00688.x
更新日期:2008-12-01 00:00:00
abstract::Wall shear stress on the pump casing cover was measured using a surface-mounted hot-film sensor. In addition, the shear stress distribution in the pump was qualitatively investigated by means of oil-film visualization. The characteristics of shear stress in the pump are discussed, including the results on the oil-film...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2007.00421.x
更新日期:2007-07-01 00:00:00
abstract::The weight gain of IVOX devices removed from the first 49 human clinical trials patients after from 1 to 29 days of implantation into the venae caval blood stream has been assessed. Each patient had received sufficient systemic heparin to maintain activated clotting times between 150 and 200 s while the IVOX device wa...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.1994.tb03329.x
更新日期:1994-11-01 00:00:00
abstract::Bovine pericardium is a widely utilized biomaterial. Usually, after harvesting, it is advantageous that the pericardium be immersed in glycerol to improve its shelf life. This can induce some degree of toxicity in the material. The studies were performed in compliance with the rules of ISO 10993 and OECD 487, in the b...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2008.00542.x
更新日期:2008-04-01 00:00:00
abstract::Experiments have been successfully performed culminating in functional, vascularized, three-dimensional cardiac muscle tissue. Past experience in tissue engineering has led us to the understanding that cell seeding density plays a critical role in the formation and function of both in vitro and in vivo engineered tiss...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2008.00591.x
更新日期:2008-09-01 00:00:00
abstract::A compact three-dimensional (3D) module is needed for hepatocyte culture in order to develop an effective hybrid artificial liver system that can retain hepatocellular structure and differentiated functions. We treated the 3D module with collagen gel to entrap rat hepatocytes. This method yielded a high hepatocellular...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.1995.tb02310.x
更新日期:1995-02-01 00:00:00
abstract::Stents are small, usually metallic tubes that are intended to prop open arteries blocked with atherosclerotic plaques. While stents have been used successfully in recent years, they still suffer from failure due to development of new tissue in stented segment (restenosis). Variations in the failure rates associated wi...
journal_title:Artificial organs
pub_type: 杂志文章,评审
doi:10.1046/j.1525-1594.2002.07084.x
更新日期:2002-07-01 00:00:00
abstract::This study compares the effects of polyethylene glycol (PEG) modified bovine hemoglobin on vascular half-life and renal function in rabbits to those of unmodified bovine hemoglobin. Renal function was assessed by the measurement of the glomerular filtration rate, urinalysis, blood chemistries, hemoglobin (Hb) excretio...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.1997.tb00250.x
更新日期:1997-08-01 00:00:00
abstract::This paper presents an overview of the U.S. Food and Drug Administration's regulatory requirements for introducing medical device and diagnostic products into commercial distribution in the United States. For any specific product, the requirements vary depending upon the product's associated risks, classification, and...
journal_title:Artificial organs
pub_type: 临床试验,杂志文章
doi:10.1111/j.1525-1594.1982.tb04146.x
更新日期:1982-11-01 00:00:00
abstract::Interest in the effects and possible mechanisms of hemodialysis on schizophrenic patients has led to a double-blind evaluation of the effects of plasmapheresis on symptoms of schizophrenia. Also, plasmapheresis was felt to be an invaluable tool for investigating the autoimmune theory of schizophrenia. Patients (n = 10...
journal_title:Artificial organs
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1111/j.1525-1594.1983.tb04203.x
更新日期:1983-08-01 00:00:00
abstract::Our study investigated the reliability of appearance of rapid atrial swirl flow (RASF) by ultrasonography (US) in the right atrium (RA), which occurred as a result of rapid isotonic saline infusion (RISI) into the central venous catheter (CVC), in predicting catheter tip position. This prospective observational study ...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/aor.13281
更新日期:2018-12-01 00:00:00
abstract::Mechanical circulatory support (MCS) devices continue to be hampered by thrombotic adverse events (AEs), a consequence of device-imparted supraphysiologic shear stresses, leading to shear-mediated platelet activation (SMPA). In advancing MCS devices from design to clinical use, in vitro circulatory loops containing th...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/aor.13626
更新日期:2020-06-01 00:00:00
abstract::We assessed the relationship of certain clinical variables (including bradykinin [BK] release and dialysis membrane) to initial mean arterial pressure (MAP) reduction in 47 patients requiring continuous renal replacement therapy (CRRT) in an intensive care unit. The pretreatment MAP was 84 +/- 14 mm Hg for the group a...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1046/j.1525-1594.2001.06703.x
更新日期:2001-12-01 00:00:00
abstract::Ventricular assist devices have been shown to be effective in advanced heart failure selected patients. They often have borderline end-organ function, what facilitates organ dysfunction. Liver failure is difficult to manage and leads to increased morbidity and mortality. We report a case of ductular cholestasis, an un...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1111/j.1525-1594.2009.00760.x
更新日期:2010-02-01 00:00:00
abstract::Technological innovations in pediatric extracorporeal life support circuits can reduce system-related complications and may improve patients' outcome. The Deltastream DP3 (Medos Medizintechnik AG, Stolberg, Germany) is a novel rotational pump with a diagonally streamed impeller that can be used over a broad range of f...
journal_title:Artificial organs
pub_type: 杂志文章,多中心研究
doi:10.1111/aor.13016
更新日期:2018-04-01 00:00:00
abstract::When cavitation occurs near a material surface of a mechanical heart valve (MHV), pits on the surface of the MHV and hemolysis are caused. Therefore, it is very important to investigate the possibility of the occurrence of cavitation in an MHV. To study the possibility of cavitation occurrence in a 25 mm Björk-Shiley ...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1046/j.1525-1594.2003.06981.x
更新日期:2003-08-01 00:00:00
abstract::For the last few years we have attempted to separate and isolate from biological fluids the uremic Middle Molecules (MM). The first step in the treatment of plasma is an ultrafiltration through AN69 membrane. The samples are fractionated by Sephadex G-15 chromatography into 9 peaks "a" to "i' under precise conditions ...
journal_title:Artificial organs
pub_type: 杂志文章
doi:
更新日期:1981-01-01 00:00:00
abstract::In this study, a detection algorithm for suction and regurgitation of the centrifugal pump during left heart bypass without relying on external flow or pressure sensors was developed and evaluated in acute studies using adult goats. The detection scheme relies on power spectral density (PSD) analysis of the motor curr...
journal_title:Artificial organs
pub_type: 杂志文章
doi:10.1046/j.1525-1594.1999.06397.x
更新日期:1999-06-01 00:00:00