Search PubMed⌕ Search

Biomedical subjects

D S Morrison

Publications and source records attributed to D S Morrison.

23 records · Page 2Linked to original sources
PubMed1982

A system for graphical display of clinical laboratory data.

Although in referral medical centers, laboratory tests related to patient management decisions may be more numerous than tests used for diagnostic decisions, little emphasis has been placed on the development of decision support systems that focus on laboratory tests in management decisions. Many of these decisions hinge on time-related series of laboratory test results. Graphical presentation of such data might be a more effective means of facilitating patient management decision making than is the conventional tabular report. The authors developed an easily used system for the graphical display of time-related laboratory results. The system presents the physician a convenient and rapid means of selecting the patient, test, and time period of interest, and provides a number of different graphical display formats. Physician acceptance of the display system has been enthusiastic. Careful attention to human factors considerations may promote physician acceptance of computer-based aids of this form.

Data Display↗
PubMedDate not supplied

Persistence of the olecranon physis: a cause of "little league elbow".

The elbow is one of the most common sites of overuse injuries in adolescent baseball players. The term "little league elbow" has been used to describe a number of entities. This article reports three cases of painful persistence of the olecranon epiphyseal plate in adolescent pitchers. Symptoms associated with this entity may improve with rest and avoidance of the aggravating activity. However, if symptoms persist and the contralateral growth plate has closed, internal fixation may be necessary and is effective in relieving the symptoms.

Adolescent↗
PubMedDate not supplied

Assessment of the infraspinatus spinal stretch reflex in the normal, athletic, and multidirectionally unstable shoulder.

To examine neural aspects of motor control in the glenohumeral joint, this study evaluates utilization of an innate spinal segmental pathway, the spinal stretch reflex, as an investigational tool that reflects neural circuitry. The purpose of this study was to determine if this reflex could be evoked from the infraspinatus muscle, if the testing apparatus and protocol for elicitation were reliable, and if the reflex response varies between groups of subjects and therefore could be useful clinically. These reflex characteristics were evaluated in the infraspinatus muscle, since rotator cuff muscle activity in subjects with glenohumeral instability exhibits differences in electromyographic activity and coordination patterns, implicating its role in dynamic stability. Normal shoulders were compared with athletic shoulders and shoulders with multidirectional instability. The spinal stretch reflex was elicited in a controlled and reliable manner. Shoulders with multidirectional instability exhibited a more-prominent spinal stretch reflex response than normal shoulders, whereas athletic shoulders exhibited a more-quiescent spinal stretch reflex response. As the spinal stretch reflex probably plays a role in motor control, variation in this reflex profile may reflect some differences in development that contribute to the variable expression of dynamic glenohumeral stability. This study suggests that the spinal stretch reflex profile may be a useful clinical tool to assist in discriminating between the normal and pathologic state. This information may also be useful in the evaluation of new treatment approaches exploiting spinal cord plasticity and spinal stretch reflex mutability through neuromuscular training.

Adolescent↗
PubMedDate not supplied

Acromioclavicular separation. Reconstruction using synthetic loop augmentation.

A total of 110 patients with a diagnosis of acromioclavicular joint separation were seen at our clinic between 1986 and 1991. Of these, 14 patients (12.7%) with grade III, IV, or V injuries required surgical reconstruction and were examined 2 years after surgery. All 14 patients underwent acromioclavicular reconstruction using a synthetic loop passed through drill holes in the base of the coracoid and the anterior third of the clavicle. When the loop is tightened, the clavicle is reduced anatomically without the anterior subluxation caused by simple clavicular cerclage. At an average followup of 44.2 months, patients were evaluated using the University of California, Los Angeles, rating scale. Twelve of the 14 had good or excellent results and returned to normal sport and work activities at 6 months. Of the two initial poor results, one required revision 1 month post-operatively because the patient was noncompliant, and the other required manipulation under anesthesia 3 months after surgery. The results in these two patients at 2 years were good and excellent, respectively. We concluded that, when medically indicated, fixation of the clavicle to the coracoid using this technique yields satisfactory results in an athletic population.

Acromioclavicular Joint↗