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At least 811 records · Page 45Linked to original sources
PubMed1975

[Sequelae of acetabulum fractures treated by total hip prosthesis].

The authors have treated by total prosthesis 39 cases of fractures of the acetabulum, at the stage of severe sequellae. 21 of them had been initially treated conservatively, and 18 had been previously operated on. 23 times they used conventional prosthesis anchored with cement. 8 cases became loose and had to be re-operated on. 16 times an original prosthesis made of highly porous metal was used with no complication at the present time.

Acetabulum↗
PubMed2002

[Minaro--new approaches for minimally invasive roentgen image based hip prosthesis revision].

The main objective of the MINARO project (Minimal Invasive NAvigation and RObotics) is the development of a modular intraoperative planning system for fluoroscopy based total hip revision surgery. Especially the distal cement removal can be a challenging problem. To avoid exhaustive x-ray imaging a navigation system should be used, nevertheless, the three-dimensional shape of the bone cement remains unclear. Our approach in the MINARO-project is to reconstruct the real shape of the bone cement by using just a few x-ray projections. First results show, that the reconstruction has an RMS-Error smaller than 0.5 mm using 6 x-ray projections.

Arthroplasty, Replacement, Hip↗
PubMedDate not supplied

[Serum cobalt and serum chromium level in 2 patients with chronic renal failure after total hip prosthesis implantation with metal-metal gliding contact].

PURPOSE: The influence of chronic renal failure on serum cobalt and serum chromium in two patients with metal-on-metal bearing (Metasul) and cementless total hip arthroplasty (Alloclassic) is investigated. METHODS: Serum cobalt and serum chronium levels were determined in the postoperative course using atomic absorption spectrometry. RESULTS: Maximum values are found to be more than 100-fold elevated when compared to the reported median serum cobalt concentrations in patients with the same prosthesis type and no known renal disease. CONCLUSION: Chronic renal failure seems to be responsible for the marked elevation of serum cobalt and serum chromium. CLINICAL RELEVANCE: Despite evidence of adverse health reactions, a possible effect of long-term cobalt and chromium loading cannot be neglected. In our opinion, metal-on-metal bearings in THA should not be inserted in patients with chronic renal failure. Follow-up investigations (serum cobalt, serum chromium, serum creatinine, BUN, echocardiography) should be performed at short intervals.

Adult↗
PubMedDate not supplied

[Blood loss in total hip prosthesis implantation: lateral versus supine position].

We performed a prospective randomized study to determine blood loss differences between supine or lateral patient position, during surgery in elective total hip replacement. Between January and October 1996, 64 consecutive cases of total hip replacements were randomly scheduled for a procedure either in the supine or in the lateral position. Of the 56 cases evaluated, 29 were operated in the supine position (SP) and 27 in the lateral position (LP). The standardized implantations were performed without cement and the blood loss was measured. The calculated loss of Hb on the day of operation was 235 g Hb +/- 17 (mean +/- s.e.) in the SP group and 177 g Hb +/- 14 in the LP group, respectively, (unpaired t-test p = 0.01). The calculated loss of Hb after five postoperative days was 227 g Hb +/- 24 (mean +/- s.e.) in the SP group and 179 g Hb +/- 24 in the LP group, respectively, p < 0.2. The net loss of Hb after five postoperative days was calculated by subtracting all perioperative blood substitutions (Cellsaver, autologous and homologous blood) resulting in 340 g Hb +/- 21 (mean +/- s.e.) in the SP group and 272 g Hb +/- 21 in the LP group, respectively, p = 0.02. The blood loss in primary cementless total hip replacement surgery can be significantly reduced by performing the procedure in the lateral position compared to that in the supine position. The blood loss is limited to the day of operation, as indicated by the stable Hb-levels thereafter.

Aged↗