Biomedical subjects

D F Geiger

Publications and source records attributed to D F Geiger.

3 recordsLinked to original sources

PubMed1997

Results of arthroscopic versus open Bankart suture repair.

The purpose of this study was to compare patients with anterior shoulder instability who were treated with an open Bankart procedure with those treated with an arthroscopic procedure. During a 3-year period, 43 patients (44 shoulders) were surgically treated. Thirty-four patients were available for followup. Eighteen shoulders had open Bankart procedure, and 16 shoulders were treated arthroscopically. Capsular laxity can be better assessed with the open procedure. A Bankart lesion was found in all the patients in both series. Average followup for Group 1 was 34 months, and for Group 2, it was 23 months. Group 1 had 83% good to excellent results with no recurrent dislocation or reoperation. Group 2 had 50% good to excellent results, and 50% fair to poor results with 3 recurrent dislocations and 4 recurrent subluxations that required second operation. The average loss of external rotation in Group 1 was not significantly greater than that in Group 2. Sixteen patients in Group 1 and 8 patients in Group 2 were able to return to their primary work or sport. Results of arthroscopic Bankart repair do not equal those of the open Bankart procedure for the rate of recurrence and postoperative range of motion. The followup reported is short, and more dislocations can be anticipated with longer followup.

Adolescent↗

PubMed1995

Identification of heterogeneous cell populations in normal human intervertebral disc.

There is clear evidence that tissues related to the intervertebral disc, such as articular cartilage, contain several phenotypically different chondrocytic cell populations. Histological data for the disc suggest the same may be true for the annulus fibrosus and nucleus pulposus, but this has not been shown directly. For the first time, cells from adult human nondegenerative nucleus pulposus and annulus fibrosus were recovered after enzymatic digestion and maintained in an alginate bead culture system for up to 6 wk. The cells remained viable and produced matrix, but did not divide. Cultured cells were stained simultaneously for the presence of chondroitin sulphate and keratan sulphate, or types I and II collagen. The majority of the cells from both the annulus fibrosus and the nucleus pulposus produced both keratan sulphate and chondroitin sulphate (> 60%), a few only detectable levels of one or the other, but a significant population produced neither. This is an indication of a population of cells with a nonchondrocytic phenotype. In nondegenerative discs, the majority of the annulus fibrosus cells produced both types I and II collagen but the majority of nucleus pulposus cells produced only type II collagen. These observations are consistent with the presence of at least 2 phenotypically stable populations of cells in the adult human intervertebral disc and with the view that the phenotype of the major population of the annulus is different from that of the nucleus.

Adult↗

PubMed1994

Analysis of spine motion variability using a computerized goniometer compared to physical examination. A prospective clinical study.

A prospective clinical study was carried out to determine whether the CA-6000 Spine Motion Analyzer was more reliable in measuring spine motion compared to previously described methods of physical examination. One-hundred-twenty age-controlled patients with a negative back history were tested with the CA-6000 to establish normal values. Interexaminer and intraexaminer correlation coefficients and coefficients of variation were determined for 30 patients by three different examiners, each testing the patients three times each. Each test consisted of examining flexion, extension, lateral flexion, and rotation. For flexion, the CA-6000 was compared to the double inclinometer and Schober methods. For extension and lateral flexion, the CA-6000 was compared to the double inclinometer and Moll methods. For rotation, the CA-6000 was compared to the double inclinometer method. The interexaminer and intraexaminer variability using the CA-6000 was significantly less (P < or = 0.025) than other methods for all motions except flexion. In flexion, the differences were not significantly different. The data from this experiment indicate that the CA-6000 has significantly less variability in measuring spine motion clinically than the other methods tested.

Adult↗