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Biomedical subjects

R A Gurtler

Publications and source records attributed to R A Gurtler.

5 recordsLinked to original sources
PubMed1993

Cat-scratch disease mimicking rhabdomyosarcoma.

A 12-year-old boy who had injured his elbow presented with a lump in the epitrochlear area. Originally thought to be a hematoma, then later myositis ossificans, this mass was actually a lymph node with large, reactive germinal centers. Although stains for acid-fast bacilli, fungal organisms, bacteria, and cat-scratch disease were negative, serological testing for detection of Rochalimaea henselae organisms found evidence of cat-scratch disease. We would like to remind orthopaedic surgeons to consider this diagnosis in evaluating masses of the soft tissues of the extremities.

Cat-Scratch Disease↗
PubMed1990

Lachman test revisited.

The Lachman test has become recognized as the most reliable noninvasive clinical method for determining the integrity of the anterior cruciate ligament. The original description provided for the test being reported as either positive or negative. The purpose of this study is to present a clinical grading system for positive examinations. The criteria are as follows: Grade I, proprioceptive appreciation of a positive test; Grade II, visible anterior translation of the tibia; Grade III, passive subluxation of the tibia with the patient supine; Grade IV, ability of the patient with a cruciate-deficient knee to actively sublux the proximal tibia. Seventy-five patients with arthroscopically-documented complete anterior cruciate ligament tears were examined clinically and graded using these criteria. In addition, all patients had arthrometric examinations to measure the amount of anterior subluxation of the tibia in millimeters. A one-way analysis of variance followed by Scheffe multiple comparisons demonstrated the mean measurements of anterior displacement of the tibia in each laxity group to be significantly different.

Adolescent↗
PubMed1987

Lachman test evaluated. Quantification of a clinical observation.

The Lachman test has become recognized as the most reliable noninvasive clinical method for determining the integrity of the anterior cruciate ligament. The original description provided for the test is reported as either positive or negative. The purpose of this study is to present a clinical grading system for positive examinations. The criteria are as follows: Grade I, proprioceptive appreciation of a positive test; Grade II, visible anterior translation of the tibia; Grade III, passive subluxation of the tibia with the patient supine; and Grade IV, ability of the patient with a cruciate-deficient knee to actively sublux the proximal tibia. Seventy-five patients with arthroscopically documented complete anterior cruciate ligament tears were examined clinically and graded using the above criteria. In addition, all patients had arthrometric examinations to measure the amount of anterior subluxation of the tibia in millimeters. A one-way analysis of variance followed by Scheffe multiple comparisons demonstrated the mean measurements of anterior displacement of the tibia in each laxity group to be significantly different.

Adolescent↗
PubMed1986

Biomechanical evaluation of the Ender's pins, the Harris nail, and the dynamic hip screw for the unstable intertrochanteric fracture.

While intramedullary fixation may have less operative morbidity than sliding plate systems, there also may be a loss of stability and strength of the fixation. In a biomechanical study with simulated unstable intertrochanteric fractures in cadaver femurs, multiple Ender's pins were 18% stronger than the single Harris nail. Compression hip screws were three times stronger than the Harris nail and two and one-half times stronger than Ender's pins. The compression hip screw was five times more rigid than either condylocephalic system.

Biomechanical Phenomena↗