Biomedical subjects

J DeLee

Publications and source records attributed to J DeLee.

3 recordsLinked to original sources

PubMed1986

Zone approach to knee arthroscopy.

The zone approach to knee arthroscopy divides the knee into ten anatomic zones. This article presents the zone classifications and describes the combination of portals for the arthroscope, the probe, and the operating instruments. The particular leg position which is thought to allow the best visualization of each zone is also described. Alternate portals are necessary in certain situations, as in knees with tight ligamentous structures. This list of standard and alternate portals is not meant to be all-inclusive, but we do urge that all ten zones are examined during arthroscopy. The objectives of this article are to describe a method of arthroscopic examination that is both systematic and comprehensive, and to develop an arthroscopic nomenclature that allows easy localization and reporting of pathology in the knee joint.

Arthroscopy↗

PubMedDate not supplied

Anterior cruciate ligament reconstruction using bone-patellar tendon-bone allografts. A biological and biomechanical evaluation in goats.

Twenty-eight goats underwent ACL reconstruction with freeze-dried bone-patellar tendon-bone allografts in one knee, the opposite knee serving as a control. One group of 16 knees was evaluated, in groups of four, at 6, 12, 26, and 52 weeks by histologic and vascular injection techniques. The other group of 12 knees was evaluated in two groups of six at 26 and 52 weeks by morphological and biomechanical techniques of analysis. Within the first 12 weeks these allografts were revascularized; in the first 26 weeks they had matured to resemble normal connective tissue. Graft stiffness was 29% of the control value and maximum force to failure was 43% of the control value. The results of this study indicated that freeze-dried bone-patellar tendon-bone allografts are biomechanically and biologically similar to patellar tendon autografts.

Animals↗

PubMedDate not supplied

Ectopic bone formation following low friction arthroplasty of the hip.

Ectopic bone formation after low friction arthroplasty (LFA) occurs nearly three times as often in males as in females and, in significant amounts, in 10 per cent of the total number of patients. The more limited the range of motion preoperatively, the more severe the degree of ectopic bone formation. The diagnosis does not closely relate to ectopic bone formation though the incidence is highest in osteoarthritis. The removal of osteophytes does not increase the incidence of ectopic bone formation. Trochanteric osteotomy in the surgical exposure is not an important cause of ectopic bone formation. A patient with ectopic bone after LFA on one side has a 92 per cent chance of developing it in a subsequent LFA on the opposite side. Systemic factors appear to play a dominant role in the production of ectopic bone.

Adult↗