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PubMedDate not supplied

Ankle joint evaluation--an overview of arthroscopic technique.

Arthroscopy is useful in diagnosing and treating ankle pathology. It is comparatively atraumatic, which makes early postoperative ambulation possible and eliminates the problems resulting from casting and immobility. Familiarity with arthroscopic instruments and technique is essential and close attention to details is mandatory to avoid damage to the joint and other complications.

Ankle Injuries↗
PubMed1990

Mechanical output about the ankle joint in isokinetic plantar flexion and jumping.

The purpose of this study was to compare for a group of ten subjects the mechanical output about the ankle during isokinetic plantar flexion with that during one-legged vertical jumps. For evaluation of the mechanical output the plantar flexion moment of force was related to the angular velocity of plantar flexion. The relationship for isokinetic plantar flexion was obtained using an isokinetic dynamometer; that for plantar flexion in jumping was obtained by combining kinematics and ground reaction forces. It was found that, at any given angular velocity of plantar flexion above 1 rad.s-1, the subjects produced much larger moments during jumping than during isokinetic plantar flexion. In order to explain the observed differences in mechanical output about the ankle, a model was used to simulate isokinetic plantar flexion and plantar flexion during jumping. The model represented both m. soleus and m. gastrocnemius as a complex composed of elastic tissue in series with muscle fibers. The force of the muscle fibers depended on fiber length, shortening velocity (Vfibers), and active state. The input variables of the model were histories of shortening velocities of the complexes, determined from kinematics, and active state. Among the output variables were Vfibers and plantar flexion moment. The simulation results were very similar to the experimental findings. According to the simulation results there are two reasons why at the same angular velocity of plantar flexion larger moments were produced during jumping than during isokinetic plantar flexion.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed2000

Midterm effects of ankle joint supports on sensomotor and sport-specific capabilities.

Twenty-one subjects with functional ankle instabilities were provided with an ankle support for all athletic and other physical activities for 3 months. Standardized tests were carried out at the beginning and after 3 weeks, 6 weeks, and 3 months. The following evaluation methods were used: KAT-2000 (static and dynamic), side stepping over 8 m, isokinetic force (Cybex 6000), angle reproduction test, SF-36 score, and Weber ankle score. Use of the ankle support improved both sensomotor and sport-specific abilities, particularly regarding dynamic requirements such as in the dynamic KAT-2000 test. Subjects using the support with functional ankle instability also demonstrated improved sport-specific capabilities such as those required in the fast side-step run. We observed no negative effect on sport-specific skills requiring joint stabilization isokinetic strength, even after 3 months. This was also the case with mobility in the talocrural joint and speed in the side-step run. Our findings demonstrate that even after 3 months there are no detrimental effects on sport-specific skills that require joint stabilization.

Adolescent↗
PubMed1985

Pure posteromedial dislocation of the ankle joint. A case report.

A 25-year-old man demonstrated a complete dislocation of the tibiotalar joint, caused by an axial loading injury in which he had fallen to the ground with his foot and ankle in supination. This was associated with disruption of the lateral ligamentous complex. Management consisted of immediate reduction, intravenous antibiotics, formal debridement, and ankle immobilization in a short leg cast. Early and delayed follow-up evaluations have revealed no complications resulting from the injury. Only seven cases of open posterior medial tibiotalar dislocation seem to have been reported previously in the literature.

Adult↗