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Biomedical subjects

G E Johnson

Publications and source records attributed to G E Johnson.

78 records · Page 5Linked to original sources
PubMedDate not supplied

Comprehensive functional analysis of shoulders following complete acromioclavicular separation.

The purpose of this study was to examine the results of the two major methods of treatment of complete acromioclavicular separation: surgery and nonsurgical techniques. Twenty male patients with complete acromioclavicular separation within the preceding 13 months were retrospectively examined and tested for recovery of shoulder strength and function. Comparisons were conducted between 10 of the patients who had been treated nonsurgically (Group 1), and 10 who had been treated surgically (Group 2). An additional group of 10 uninjured male subjects as controls was also tested for comparison of strength between dominant and nondominant limbs (Group 3). All of the patients were tested for strength of both shoulders using the Kin-Com isokinetic dynamometer, for shoulder flexibility using the Leighton flexometer, and for grip strength using a standard grip dynamometer. A questionnaire concerning patient evaluation of the injury was also administered to all of the subjects. The majority of strength and flexibility tests showed no significant differences between the nonsurgical and surgical groups. The nonsurgical group was statistically superior to the surgical group in the following test scores: eccentric abduction (fast speeds), concentric external rotation (slow speeds), eccentric external rotation (fast), eccentric abduction (slow), and flexibility in external rotation. These findings generally indicated that the nonsurgical treatment of a third-degree acromioclavicular separation is superior in restoring normal shoulder function in the 1st year following injury.

Acromioclavicular Joint↗
PubMedDate not supplied

Locked bucket-handle meniscal tears in knees with chronic anterior cruciate ligament deficiency.

Because we noticed patients had difficulty regaining full range of motion after surgery for a locked bucket-handle meniscal tear with simultaneous reconstruction for a chronic anterior cruciate ligament tear, we adopted a two-stage procedure for this group of patients. We evaluated the results of a two-stage procedure in the knees of 16 athletes (Group 1) and compared their outcome with the outcome of 16 matched athletes who had been treated with simultaneous repair or removal of the displaced bucket-handle meniscal tear and autogenous patellar tendon anterior cruciate ligament reconstruction (Group 2). Four patients in Group 2 required a second procedure or casting to regain full extension. No patient in Group 1 required a second procedure. One meniscal retear was detected in Group 1. The two-stage procedure also appears to have a number of theoretical advantages: 1) more aggressive use of repair rather than removal of a displaced torn meniscus, 2) prevention of problems in regaining range of motion, 3) allows a second look to judge the success of meniscal repair, and 4) allows time for the patient to prepare for anterior cruciate ligament reconstruction physically, mentally, academically, and socially.

Adolescent↗
PubMedDate not supplied

Outpatient surgical management of arthrofibrosis after anterior cruciate ligament surgery.

We present a consecutive series of nine patients who were referred to us because of arthrofibrosis (loss of > 15 degrees of extension) after intraarticular anterior cruciate ligament reconstruction using autogenous patellar tendon (eight patients) or semitendinosus (one patient) graft. Eight patients had surgery within 2 weeks of injury. All patients had been immobilized in flexion after the anterior cruciate ligament reconstruction and they had failed to improve despite vigorous physical therapy and other closed methods of treatment. The mean time from anterior cruciate ligament reconstruction to the subsequent surgery was 10.2 months (range, 3 to 14). The patients underwent an outpatient arthroscopic anterior scar resection, notchplasty, a closed knee manipulation for flexion, and extension casting. Serial daily extension cast changes allowed the patients to obtain full extension, which was maintained by a bivalved extension splint for bedtime use. Flexion was actively sought by aggressive outpatient physical therapy. All patients except one noted near-normal ultimate range of motion. One patient could only attain 10 degrees short of flat extension at the end of his rehabilitation and was considered a failed result. At final followup (mean, 31 months), no patient complained of symptoms of instability, all had a normal gait, and all but one were able to return to athletic activities.

Adolescent↗
PubMedDate not supplied

Zinc lowers high-density lipoprotein-cholesterol levels.

Zinc administration in rats is associated with a rise in serum cholesterol level. This study examined the effect of zinc administration on serum lipoprotein values in man. Twelve healthy adult men ingested 440 mg of zinc sulfate per day for five weeks. High-density lipoprotein-cholesterol concentration decreased 25% below baseline values (40.5 to 30.1 mg/dL). Total cholesterol, triglyceride, and low-density lipoprotein-cholesterol levels did not change throughout the study. The sharp fall of the "antiatherogenic" lipoprotein, high-density lipoprotein, associated with zinc administration supports the concept that zinc ingestion may be atherogenic in man.

Adult↗