0000000000072759
AUTHOR
Jeffrey C. Lotz
showing 8 related works from this author
Verlaufsbeobachtung des Kollagen- und Knochenstoffwechsels bei Patienten mit zementfreier Hüfttotalendoprothese*
2008
Introduction This study investigated the influence of concentration and activity of several markers of the collagen and bone metabolism and their impact on ingrowth of non-cemented total hip arthroplasty. Methods 40 patients underwent an implantation of a ABG-prosthesis. Before surgery and 1, 2, 12 and 24 weeks after it serum concentrations of PICP, ICTP, IGF-1, ON, b-AP, Calcium, Phosphate, GPT and Creatinin were measured and a collagen ratio (CQ) was calculated. Results PICP decreased until 1st week, increased at 2nd week and decreased again after that time. ICTP increased significantly in 1st week, reached a maximum in 2nd week and decreased after that. b-AP decreased in 1st week but inc…
Long-term metabolic effects in patients with urinary diversion
1998
The use of intestinal segments in genitourinary reconstruction could influence vitamin metabolism and affect the skeletal bone and its mineral content in the long term. In 137 patients, serum levels of the vitamins A, B1, B2, B6, B12, D, and E and of folic acid, bile acid, and ammonia as well as levels of intracorpuscular vitamin B12 and folic acid were examined and a red blood cell count was performed. The patients were divided into three groups (or = 2 years,2 toor = 4 years, and4 years after surgery) as well as into children and adults. In addition, bone mineral density (dual-photon absorptiometry) was measured in 25 patients. Of these, 16 patients were approximately 16.8 years s/p recta…
A phase IIA study of the topoisomerase I inhibitor, exatecan mesylate (DX-8951f), administered at two different dose schedules in patients with plati…
2004
OBJECTIVES: There is an urgent need for new agents with activity in platinum- and taxane-resistant epithelial ovarian cancer. Exatecan mesylate is a novel topoisomerase I inhibitor with potent activity against ovarian cancer in vitro. A multicentre phase IIA study was conducted in patients with platinum- and taxane-resistant epithelial ovarian cancer. PATIENTS AND METHODS: Fifty-seven patients with bidimensionally measurable ovarian cancer, previously exposed to platinum and taxanes, whose disease had relapsed within 6 months of platinum-containing chemotherapy were randomised to one of two intravenous schedules of exatecan mesylate; 0.3 mg/m(2) daily for 5 days every 3 weeks (Arm A) or 2.1…
Monitoring prothrombin fragment 1+2 during initiation of oral anticoagulant therapy after intracoronary stenting
1992
Patients with intracoronary stent implantation are treated with aggressive anticoagulant and antiplatelet therapy consisting of high-dose heparin, phenprocoumon, acetylsalicylic acid, dipyridamole, and the infusion of dextran to prevent a subacute thrombotic occlusion of the stented segment. In an effort to optimize this treatment by reducing both imminent bleeding complications and subacute thrombotic occlusion, the concentrations of prothrombin fragment 1 + 2 (F 1 + 2) were determined after intracoronary Palmaz-Schatz stent implantation in 19 consecutive patients. The F 1 + 2 concentrations after stent implantation and before the initiation of oral anticoagulant therapy (OAT) were 0.35 nm…
Influence of blood sampling from venipunctures and catheter systems on serial determinations of prothrombin activation fragment 1 + 2 and thrombin-an…
1993
To evaluate the influence of different blood sampling techniques on test results of thrombin-antithrombin III complex (TAT) and prothrombin fragment 1 + 2 (F1 + 2) serial determinations were performed. In six groups of nonrandomized patients (ten patients each) the concentrations of the coagulation markers of blood samples from central catheters (internal jugular, caval, Shaldon, pulmonary artery) and peripheral cannulas (17G and 18G) were compared with those of blood samples obtained simultaneously from direct venipunctures of the contralateral arm. Medians and 25th-75th percentiles of TAT and F1 + 2 concentrations of plasmas obtained from central catheters were not different from those ta…
Laboratory control of minimal heparinization during haemodialysis in patients with a risk of haemorrhage
1994
Abstract For patients undergoing dialysis with a high risk of haemorrhage there is no standardized procedure for anticoagulation during extracorporeal circulation. Minimal heparinization with a dose equivalent to half that used for chronic haemodialysis was employed in 49 patients (125 haemodialyses) performed after operative interventions (83.3%), after haemorrhagic events (5.2%) and after invasive investigations (11.5%). Using a biocompatible membrane and a low molecular weight heparin (bolus dose 500-1300 U; continuous infusion 100-400 U) it was possible to complete haemodialysis in 74 cases (Group 0) without clots appearing in the venous bubble trap of the tubing system. In 30 cases (Gr…
Biochemical bone markers compared with bone density measurement by dual energy X-ray absorptiometry
1995
In contrast to medical imaging, the biochemical markers allow a more frequent determination and are not as invasive as histomorphometric methods. We investigated biochemical markers of type I collagen compared with bone density measurements in 85 females between 41 and 89 years of age (median: 57 years). The bone density measurements were performed by dual energy X-ray absorptiometry (DXA) on the lumbar spine (L1-4). The bone density measurements were stated as a percentage of the norm. All patients were divided into three groups: I =80%; II = 80-130%; III =120%. Based on this classification the median concentration of the I-carboxyterminal propeptide of type I collagen in serum (S-PICP) as…
Effect of long-term treatment with GH on bone metabolism, bone mineral density and bone elasticity in GH-deficient adults
1998
OBJECTIVE Adults with GH deficiency (GHD) commonly have subnormal bone mineral density (BMD), and have been reported to have an increased risk of fractures. It has been suggested that GH replacement therapy may have beneficial effects on bone in such patients. The aim of this study was to investigate the effects of long-term GH replacement therapy on bone metabolism, BMD and bone elasticity in adults with GHD. DESIGN At the start of the study, 20 adults with GHD were randomized to receive either GH, 0.25 IU/kg/week (the ‘GH group’) or placebo (the ‘placebo group’). After 6 months, patients in the placebo group were switched to GH therapy, and all patients received GH for a further 42 months…