Biomedical subjects

S Harving

Publications and source records attributed to S Harving.

3 recordsLinked to original sources

PubMed1991

A method for bone-cement interface thermometry. An in vitro comparison between low temperature curing cement Palavit, and Surgical Simplex P.

Previous temperature measurements at the bone-cement intreface have all shown large variations. To evaluate more precisely the temperature profiles during cement curing, a new experimental model was developed. Eight thermocouple electrodes at the bone-cement interface for each test specimen were used for continuous temperature recordings. Temperature profiles of Palavit was compared with those of Surgical Simplex P in an in vitro model using isolated pig femurs. Defects of 12 x 17 mm in the femoral metaphysis were filled with cement. In six tests with each type of cement, Palavit peaked at a temperature of 50 +/- 0.5 degrees C, whereas Surgical Simplex P peaked at 60 +/- 0.7 degrees C. Core temperatures reached peak values of 70 +/- 0.8 degrees C and 95 +/- 2.2 degrees C for Palavit and Surgical Simplex P, respectively.

Animals↗

PubMed1989

Salvage of exposed implants.

With increased use of tissue-expanders the incidence of exposed implants is expected to rise. Eight cases with salvage of an exposed implant are presented. At repair great care was taken to prevent tension on the suture lines either by reducing the volume of the implant or by using a skin flap. Seven patients healed without further complications. In one patient the implant had to be removed due to reexposure. We find that salvage of implants should be tried in suitable cases. If this procedure is not successful a traditional surgical procedure with removal of the implant only has to be delayed for a short time.

Adolescent↗

PubMed1989

The Charnley total hip arthroplasty in juvenile rheumatoid arthritis patients.

A follow up of 27 consecutive total hip arthroplasties in 16 patients with juvenile rheumatoid arthritis was performed. The mean age at surgery was 18 years, and the average follow-up period was 64 months. No serious early complications were recorded, but three deep infections developed from 6 to 18 months after the arthroplasty, all requiring revision. The clinical results were good at follow up, as 20 hips were free of pain and 7 had only slight pain. Most of the patients had improved their walking ability and the range of motion in the hip as well. A poor correlation was, however, shown between the clinical and the roentgenographical results, as there was one femoral implant that was definitely loose and four more hips that had components which were probably loose. The frequency of infections might have been reduced by using antibiotic prophylaxis during surgery in all the cases; the frequency of aseptic loosening might also have been reduced by improved cementing techniques. Because of high loosening rate without clinical symptoms, it is recommended to follow the patients roentgenographically to make revision surgery possible while the bone stock still is sufficient.

Adolescent↗