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Biomedical subjects

F M Thompson

Publications and source records attributed to F M Thompson.

46 records · Page 3Linked to original sources

Arthrodesis of the first metatarsophalangeal joint for hallux valgus in rheumatoid arthritis.

We reviewed the results of reconstruction of the fore part of the foot in rheumatoid patients by arthrodesis of the first metatarsophalangeal joint. The follow-up averaged 4.1 years (range, 2.0 to 7.25 years). Eighteen feet in eleven women were operated on. Twelve feet underwent total reconstruction of the fore part: arthrodesis of the first metatarsophalangeal joint and excision of all of the lesser metatarsophalangeal joints. Six feet underwent subtotal reconstruction, which included arthrodesis of the first metatarsophalangeal joint. The results were classified as excellent in fourteen feet, good in two, and fair in two. There were no poor results. Metatarsophalangeal bone fusion was achieved in all but one foot (fusion rate, 94 per cent). The one fibrous ankylosis was painless, with satisfactory function. Interphalangeal degenerative joint disease was a radiographic but not a clinical sequela. Arthrodesis of the first metatarsophalangeal joint provided stability that permanently corrected deformity, permitted the patients to wear ordinary shoes, and, in combination with excisional arthroplasty of involved lesser metatarsophalangeal joints, relieved disabling pain in the fore part of the foot.

Adult↗

Two-stage reimplantation for the salvage of infected total knee arthroplasty.

The results of eleven two-stage reimplantations to salvage eleven infected total knee arthroplasties in ten women (seven with osteoarthritis and three with rheumatoid arthritis) were evaluated after an average follow-up of thirty-four months. The staged procedures included removal of all of the components of the prosthesis and all cement, then six weeks of parenteral antibiotic therapy (monitored by maintaining serum bactericidal levels at a peak dilution of 1:8), and finally reimplantation with a total condylar-type prosthesis. All antibiotics were discontinued after reimplantation. At follow-up, no patient had had a recurrence of the original infection, but one had a hematogenous infection with a different organism secondary to an infected bunion. The results after reimplantation were rated excellent in five knees, good in four, and fair in two. Weakness of the extensor mechanism with an extension lag was the most frequent complication. We do not believe that antibiotic therapy alone is adequate for the management of an infection around a prosthesis. The method described appears to be effective but it is costly and time-consuming. The surgical procedures and medical management are technically difficult, often special equipment and a custom-made prosthesis are required, and there are no shortcuts.

Aged↗

The effective duration of the delay phenomenon in the rat.

In standard skin flaps in the rat, the effect of a delay was undetectable for the first 3 weeks and the maximum benefit was not apparent until the sixth week. At all time intervals the delay phenomenon was not as pronounced in the rat as in other species. The delay phenomenon in the rat lasts at least 30 weeks. The rat does not appear to be an ideal model for the study of skin flaps.

Animals↗

Adult acquired flatfoot deformity at the talonavicular joint: reconstruction of the spring ligament in an in vitro model.

The mobile unilateral flatfoot deformity of chronic posterior tibial tendon insufficiency has been difficult to correct by soft tissue procedures. The procedures can decrease pain, but they do not always correct the longitudinal arch or relieve all the symptoms. Using 10 fresh frozen cadaveric specimens and a rig for stimulation of weightbearing, the deformity associated with chronic posterior tibial tendon insufficiency was produced by multiple ligamentous release and documented by AP and lateral radiographs. Reconstruction of the spring ligament using a ligament bone autograft from the superficial deltoid ligament was then performed and tested under load. The mean correction was within 2.5 degrees of normal (over or undercorrection) on both the AP and lateral radiographs with the specimens under load. Clinical Relevance. In posterior tibial tendon insufficiency, it may be possible to address the ligament as well as tendon insufficiency to gain a corrected arch. The success of such a procedure will depend upon adequate tendon and ligament reconstruction in a fully mobile deformity. Questions remain as to the adequacy of this ligament graft, and a stronger free ligament graft, as well as correction of any bony malalignment, may be required.

Ankle Joint↗