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Biomedical subjects

G T Thompson

Publications and source records attributed to G T Thompson.

8 recordsLinked to original sources
PubMed1997

The effect of cryotherapy on eccentric plantar flexion peak torque and endurance.

OBJECTIVE: The effects of cryotherapy on eccentric torque production and muscle endurance have been controversial. Our intent was to examine the effect of cryotherapy on isokinetic eccentric plantar flexion peak torque at 30 degrees /sec and 120 degrees /sec and on endurance at 120 degrees /sec. DESIGN AND SETTING: SUBJECTS WERE TESTED ON AN ISOKINETIC DYNAMOMETER FOR PEAK TORQUE AND ENDURANCE AND WERE THEN RANDOMLY ASSIGNED TO ONE OF FOUR GROUPS: (a) peak torque measurements at 30 degrees /sec and 120 degrees /sec after a 30-minute 10 degrees C ice bath immersion, (b) peak torque measurements at 30 degrees /sec and 120 degrees /sec without ice bath immersion (control), (c) endurance measurement at 120 degrees /sec after a 30-minute 10 degrees C ice bath immersion, and (d) endurance measurement at 120 degrees /sec without ice bath immersion (control). Subjects completed each of the four experimental conditions with 7 to 14 days between conditions. SUBJECTS: Eleven male and 11 female volunteers (mean age, 23.8 +/- 3.5 years) were screened for normal ankle range of motion, past history of lower extremity injury, and contraindications to cryotherapy. MEASUREMENTS: Dependent t tests were used to analyze practice session data in order to establish reliable baseline measurements. A 2 x 2 analysis of variance (ANOVA) with repeated measures (p < .05) was used to analyze peak torque data. A one-way ANOVA (p < .05) was used to analyze endurance data in the form of total work. RESULTS: Velocity significantly affected peak torque production, with eccentric peak torque values significantly higher at 120 degrees /sec than at 30 degrees /sec for both the control and the immersion conditions. Cryotherapy had no effect on eccentric peak torque at either 30 degrees /sec or 120 degrees /sec, but it increased eccentric total work (endurance) at 120 degrees /sec. CONCLUSIONS: Cryotherapy has long been known to have beneficial therapeutic effects. In our study, cryotherapy did not significantly affect eccentric peak torque, but it did increase muscle endurance. An athlete can reap the beneficial effects of cryotherapy, such as pain reduction, vasoconstriction, and edema control, without compromising eccentric force production or endurance.

Journal Article↗
PubMed1987

Incidental findings on gallbladder sonography.

Upper abdominal ultrasonography demonstrated important incidental findings in 4.4% of 480 patients referred specifically for a gallbladder examination. The sonographic findings contributed dramatically to the subsequent management of these patients. A policy of examining all of the upper abdominal organs is advocated in all patients referred for sonography of a single organ or system.

Adult↗
PubMed1985

Pneumocolon as an aid to small-bowel studies.

A prospective study was performed in 138 consecutive patients referred for small-bowel examination to evaluate the use of the pneumocolon when there was poor demonstration of the terminal ileum. One hundred and twenty-two patients were examined by enteroclysis (small-bowel enema) and 16 by small-bowel meal. Pneumocolon was used in 38 of the small-bowel enemas and in eight of the small-bowel meal examinations. In 29 cases (21 small-bowel enema; eight small-bowel meal) the use of the pneumocolon significantly improved demonstration of the terminal ileum. When the distal ileum is not adequately seen on a small-bowel study, pneumocolon serves as a useful additional technique.

Administration, Oral↗
PubMed1984

Perception--a problem in the grading of sacro-iliac joint radiographs.

Reliability in the assessment of radiographic abnormalities in the sacro-iliac joint was investigated by rheumatologists and radiologists experienced in the reading of such films. This study differs from previous ones in that films were masked to reduce cueing from the radiographic appearance of other pelvic bone and joint structures. Agreement was greatest (greater than or equal to 80%) when only the presence or absence of abnormality was considered. When corrected for chance, agreement on the individual radiographic abnormalities was frequently poor or modest. The use of reference radiographs reduced absolute disagreement and had a modest influence on absolute agreement. The scoring of films for epidemiologic purposes should preferably be delegated to senior radiologists using standard reference films. Nevertheless, there remains a considerable margin of error in the interpretation of sacroiliac joint radiographs which is of clinical and epidemiological importance considering the weight that radiographs of this joint carry in diagnostic rheumatology.

Ankylosis↗
PubMed1983

Retroperitoneal pseudolymphadenopathy.

Computed tomography is very sensitive in detecting enlarged retroperitoneal lymph nodes. Several structures such as vessels, bowel loops, fibrous tissue and hemorrhage can simulate pathologic retroperitoneal nodal enlargement. A thorough awareness of the normal retroperitoneal anatomy will help in correct interpretations and may obviate the need for more invasive diagnostic procedures.

Adult↗
PubMed1979

Haematin therapy and leucocyte delta-aminolevulinic-acid-synthase activity in prolonged attack of acute porphyria.

The activity of leucocyte delta-aminolaevulinic-acid (A.L.A.) synthase was monitored throughout a prolonged attack of acute intermittent porphyria in a 29-year-old women. Clinical severity was associated with a pronounced increase in activity of this enzyme and high urinary excretion of A.L.A. Haematin therapy resulted in clinical improvement associated with a reduction in the activity of A.L.A. synthase and reduction in urinary excretion of A.L.A.

5-Aminolevulinate Synthetase↗