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Biomedical subjects

R Babst

Publications and source records attributed to R Babst.

45 records · Page 3Linked to original sources
PubMed1989

[Treatment of infected hip joint arthroplasty. Results of treatment of 62 infected total prosthesis arthroplasties].

The treatment of 62 cases of infected total joint arthroplasty of the hip is reported. The treatment regimen for each patient was dependent on the general medical condition of the patient and the clinical signs of infection, as well as the type of bacteria, the bony anchorage of the prosthesis and the bone stock of femur and acetabulum. Surgical treatment was one of the following: treatment of the infection leaving the prosthesis in situ; one-stage or two-stage revision arthroplasty; or excision arthroplasty (Girdlestone procedure). There were 11 early and 51 late infections. The commonest bacterium isolated was Staphylococcus epidermidis (30%). The primary success rate of revision of the shaft was somewhat better with cemented than with uncemented prostheses. The overall success rates for cemented and for uncemented shafts were similar (91.5% versus 90%).

Adult↗
PubMed1989

[Clinical significance and treatment concept of Lisfranc dislocation and dislocation fracture].

Dislocations and fracture dislocations of the tarsometotarsal joint are uncommon (only 30 cases have been treated in our hospital in a 20-year period). The late results of tarsometotarsal injuries in 20 patients have been reviewed. The average follow-up was 3.8 years (range 8 months to 20 years). Methods of treatment were either open (n = 15) or closed (n = 5) reduction with (n = 18) or without (n = 2) internal fixation and cast immobilization (n = 10). Late results clearly correlate with the quality of reduction. An open procedure is usually necessary to achieve anatomical reduction. Diagnostic and operative problems are discussed.

Adolescent↗
PubMed1989

[Surgical therapy of pleural empyema].

In the period from January 1976 to December 1986, 31 (56.3%) out of 55 patients with pleural empyema were treated, after failure of conservative treatment with antibiotic drugs, pleural puncture and tube drainage. Twenty-two patients were submitted to a posterolateral thoracotomy with debridement in the early stage or decortication in the later stage of empyema thoracis. There was no relapse of empyema in this group, but 7 patients suffered from air leakage for 7 to 19 days (mean 12 days). One patient needed rethoracotomy after debridement for continuous bleeding. Nine patients were treated in a first step with limited thoracotomy in local anaesthesia with or without costotomy. There were 5 relapses of empyema in this group. The average time of hospitalization was for the debrided cases 13.6 days and for the decortication group 19.6 days. The conservatively treated group remained during 39.5 days in the hospital.

Adolescent↗
PubMed1989

[Therapeutic concepts in infected hip prosthesis].

In the period from January 1980 to December 1987, 62 patients with infected hip joint arthroplasties were treated. The duration of observation was on average 37 months (minimum 12 months, maximum 91 months). The choice of treatment modality depended on the type of infection, the state of anchorage of the endoprosthesis, the general condition of the patient, the type of bacterium and the state of the tissue surrounding the implant. 42 arthroplasties (67%) healed primarily. The remaining 20 were subject to 46 further operations (2.3 relapse operations/patient). 14 subsequently healed (23%) and six cases remained definitively infected.

Debridement↗
PubMedDate not supplied

Role of glutamine in the immune response in critical illness.

The dependence of human lymphocyte functions on the exogenous provision of glutamine (GLN) was evaluated in a series of in vitro experiments. The transcription of early activation markers (IL-2, IL-2-receptor, IL-4, IL-4, GM-CSF, IFN gamma) as evaluated by polymerase chain reaction was observed even in the absence of exogenous GLN. In contrast, later events of lymphocyte activation including cytokine production, proliferation of lymphocytes and lymphokine-activated killer cell activity were found to depend on exogenous GLN provision. These in vitro results are discussed in the context of established data on the reduction of peripheral blood GLN concentrations in critically ill patients and in view of recent studies reporting improved outcome of critically ill patients following GLN substitution. By and large, these data support the concept of GLN substitution in critical illness. However, the definition of indications and dose-response relationships clearly require further clinical studies.

Cells, Cultured↗
PubMedDate not supplied

Intralipid-based short-term total parenteral nutrition does not impair small intestinal mucosa-related cellular immune reactivity in the healthy rat.

BACKGROUND: The lipid component of total parenteral nutrition (TPN) has reportedly been associated with trophic effects on the intestinal mucosa and suppressive effects on the immune system. METHODS: We have challenged these hypotheses using a 7-day TPN rodent model comparing the effects of isocaloric, isonitrogenous lipid-based (TPN-lipid, 50% of calories as long-chain triacylglycerol) and carbohydrate-based TPN (TPN-CH, 100% of calories as carbohydrates) on mucosal morphology and immune function. Enterally fed animals were included to establish a baseline for immunologic read-outs. The study was performed in healthy, metabolically stable animals to avoid interference by septic or trauma-related stress factors. RESULTS: Both TPN regimens resulted in a significantly smaller weight gain (TPN-lipid, 29.8 +/- 4.0 g; TPN-CH, 30.3 +/- 4.4 g) compared with enterally fed reference animals (49.2 +/- 3.2 g; p = .007), with no difference in nitrogen balance between the TPN groups. Mucosal sucrase activity was significantly lower in both TPN groups (TPN-lipid, 8.8 +/- 1.0 x 10(-7) katal per gram (kat/g) of protein; CH: 11.9 +/- 1.6 x 10(-7) kat/g of protein) compared with enteral feeding (17.4 +/- 0.9 x 10(-7) kat/g of protein; ANOVA: p = .0007). Morphometric analysis of the small intestine revealed no differences between the two TPN groups although a significantly depressed villus height in the TPN-lipid group could be observed in comparison to enterally fed reference rats (TPN-lipid, 0.47 +/- 0.02; TPN-CH, 0.50 +/- 0.01; enteral, 0.56 +/- 0.02 mm; ANOVA: p = .0298). Light and electron microscopy revealed a normal surface architecture in all three groups of rats. Cellular immune reactivity was evaluated using a novel specific immunization protocol: animals were immunized against OVA 4 weeks before TPN. OVA-induced lymphoproliferative responses and phenotypic data from draining popliteal and mesenteric lymph nodes were evaluated after the different regimens. Results did not differ among the three groups. CONCLUSIONS: In healthy rodents, short-term lipid-based and carbohydrate-based TPN regimens lead to limited mucosal atrophy with preserved surface architecture compared with enteral feeding. However, peripheral and mesenteric cellular immune responsiveness after both TPN regimens remained comparable to enterally fed reference animals. Therefore, mesenteric and systemic cellular immune reactivity does not appear to be impaired by lipid-based or carbohydrate-based TPN.

Animals↗
PubMedDate not supplied

Glutamine peptide-supplemented long-term total parenteral nutrition: effects on intracellular and extracellular amino acid patterns, nitrogen economy, and tissue morphology in growing rats.

Glutamine (GLN) is a nonessential amino acid that is not included in current regimens for parenteral nutrition because of its chemical instability. This study tested the hypothesis that GLN supplementation during long-term total parenteral nutrition (TPN) (3 weeks) would enhance GLN availability, thereby improving nitrogen economy and growth in a growing rat model: Standard TPN delivering 300 kcal/kg per day (lipid:carbohydrate = 1.1) including 2.1 g of nitrogen per kilogram per day in an all-in-one solution was compared with an isonitrogenous, isocaloric, and isovolemic TPN regimen with 0.29 g of nitrogen per kilogram per day substituted by GLN derived from the dipeptides glycyl-GLN and alanyl-GLN (TPN GLN). Enterally fed controls were included. Analysis was confined to nonbacteremic animals with negative blood culture, in which extracellular and intracellular amino acid concentrations including GLN, nitrogen balance, serum protein concentrations, growth, and histologic sections of liver and small-bowel mucosa (light and scanning electron microscopy) were evaluated. Hepatic intracellular GLN concentrations were significantly lower, in animals receiving GLN-free TPN (11.7 +/- 1.6 nmol/mg fat-free dry and solid tissue mass, n = 9) compared with both GLN-supplemented TPN (16.0 +/- 3.0, n = 7) and enteral feeding (18.2 +/- 1.8, n = 6) (p < .001). Corresponding results were found for intracellular GLN concentrations in skeletal muscle (TPN standard 12.5 +/- 3.1, TPN GLN 14.7 +/- 3.1, enteral control 17.3 +/- 2.3, p < .05), intestinal mucosa, and spleen as well as for plasma concentrations.(ABSTRACT TRUNCATED AT 250 WORDS)

Amino Acids↗
PubMedDate not supplied

Management of infected hip arthroplasty.

1. Infected hip arthroplasties can be successfully managed with the appropriate surgical treatment and a long-term antimicrobial therapy. 2. The type of surgical treatment must be based on considerations of various prognostic indications such as the infective agent, the duration of the infection, the stability of the implant component, and the quality of the bone stock and the soft tissue. 3. The majority of infections in artificial hip joints occur by direct inoculation during surgery or by contamination of a local hematoma that arose after surgery.

Adult↗