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Biomedical subjects

P Stratford

Publications and source records attributed to P Stratford.

7 recordsLinked to original sources
PubMed1987

Diagnostic value of knee extension torque tracings in suspected anterior cruciate ligament tears.

The purpose of this study was to determine the diagnostic accuracy of knee extensor muscle torque tracings in patients suspected of having damage to the anterior cruciate ligament of the knee joint. The knee extensor torque tracings of 30 patients suspected of having anterior instability of the knee joint were reviewed independently for abnormalities believed to be associated with anterior cruciate ligament damage. These results were compared blindly with an arthroscopic evaluation. The diagnostic accuracy of the torque tracing approach was determined by calculating the prevalence, sensitivity, specificity, and positive and negative predictive values. The sensitivity and specificity were calculated to be 25.0% and 85.7%, respectively. These results suggest that the curve patterns examined in this article have poor diagnostic accuracy and are of little benefit as a clinical diagnostic aid.

Adult↗
PubMed1985

Modified essay question.

This article examines the reliability and validity of the modified essay question. An 18-item modified essay question was developed and pretested on a group of clinical experts. After the pretest, the modified essay question was administered to a group of 25 physical therapy students immediately before their second level orthopedic placement. A reliability index of .39 (coefficient alpha) was calculated for the test. In addition, measures of validity were obtained by correlating the modified essay question scores with multiple-choice question scores and the students' in-clinic reasoning scores. The results suggest that the reliability coefficient found in this study is comparable to the medical literature. Also, the results showed that the modified essay question demonstrated a greater correlation with the in-clinic clinical reasoning score compared with the parallel content multiple-choice examination. Furthermore, preliminary evidence suggests that the modified essay question may be a useful paper and pencil tool in evaluating clinical reasoning. Finally, several shortcomings of this study are discussed in conjunction with a direction for further study.

Adult↗
PubMed1982

Electromyography of the quadriceps femoris muscles in subjects with normal knees and acutely effused knees.

The purpose of the study was to describe the electrical activity of the vastus medialis, rectus femoris, and vastus lateralis muscles in subjects with normal knees and acute, severely effused knees when contracting maximally at 30 degrees and 0 degrees of knee flexion. Two groups identified were 1) an effused group (n=8) with subjects having one effused knee and one normal knee and 2) a normal group (n = 8) with subjects having two normal knees. The results were evaluated on two occasions by an observer who has unfamiliar with the groups to which the subjects belonged. The repeated evaluation yielded a high reliability coefficient (Spearman Rho r = .91). Analysis revealed a marked decrease in electrical activity at 0 degrees knee flexion compared to 30 degrees knee flexion in all muscles monitored in the effused knees, while the electrical activity was about equal in both joint positions for the normal knees in both groups. A hypothesis was formed that suggests the decreased electrical activity at 0 degrees in the effused knees results from reflex inhibition caused by joint capsule distension and intra-articular pressures that change with joint position.

Adolescent↗
PubMed1982

Lumbar disc disease.

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Clinical Trials as Topic↗