Biomedical subjects
K A Jurist
Publications and source records attributed to K A Jurist.
The strength of Achilles tendon repair: an in vitro study of the biomechanical behavior in human cadaver tendons.
Eighteen fresh frozen human Achilles tendons were used to test the ultimate strength of repaired tendon "ruptures." Three methods, the Kessler, the Bunnell, and the locking loop, were used to test the initial strength of Achilles tendon repair. The Kessler and Bunnell methods are current standard clinical configurations described for Achilles tendon repair. Under uniform and standardized laboratory conditions, the specimens were loaded to failure. The locking loop suture method was substantially stronger than either of the other two standard configurations. The latter two did not differ significantly from each other. The results of this study may be clinically relevant in terms of the choice of the repair method for surgically treated Achilles tendon ruptures.
Medial scapular winging in a patient with normal electromyograms.
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Peroneal nerve dysfunction as a complication of lateral meniscus repair: a case report and anatomic dissection.
A case report is presented in which a complete peroneal nerve palsy complicated lateral meniscus repair. The meniscal repair was performed using the combined method of arthroscopically placed inside-out needles and a posterior incision to view their exit. A cadaver limb was then used to examine the anatomy of lateral meniscus repair. Needles used for meniscus repair were passed into the posterior horn of the lateral meniscus using the inside-out and the outside-in methods. Computerized axial tomography (CAT) was then used to establish the proximity of the needles to the peroneal nerve in the posterolateral corner. The inside-out needles were dangerously close to the peroneal nerve. The outside-in needles had a larger margin of safety. The posterolateral corner was then dissected to verify and photograph these relationships.
Anteroposterior tibiofemoral displacements during isometric extension efforts. The roles of external load and knee flexion angle.
Rehabilitation of knee extensors is a major consideration in patients with cruciate injuries and repairs. Extension exercises, however, can produce undesirable loads on the injured or replaced anterior cruciate ligament (ACL) resulting in permanent stretch of this restraint. Our study measures the tibiofemoral displacements associated with proximal, middle, and distal locations of the external resisting force and knee flexion angles of 30 degrees, 60 degrees, and 90 degrees. Our results show that tibiofemoral displacements are dependent on both location of the external resisting force and knee flexion angle, with anterior displacements being associated with distal displacement of the resistance pad. The results suggest that patients with ACL injuries or repairs conduct extension exercises with a proximal position of the resistance pad to minimize loads and prevent stretching of this constraint.