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Biomedical subjects

G A Korbon

Publications and source records attributed to G A Korbon.

11 recordsLinked to original sources
PubMed1987

The Balans chair and its semi-kneeling position: an ergonomic comparison with the conventional sitting position.

Recently, the Balans chair has been introduced with claims that, because of its semi-kneeling position, individuals will experience decreased low-back pain (LBP) as well as improvement in circulation. This study investigated the validity of these claims. Twenty healthy subjects were randomly assigned to one of two groups. Group 1 subjects sat in the Balans chair for a 30-minute study period and then sat in a conventional office chair for an additional 30-minute period. Group 2 subjects were studied in the reverse seating order. Parameters studied were cervical and lumbar paraspinous surface EMG, and pedal cutaneous blood flow measured by laser-Doppler flowimetry. In addition, a questionnaire comparing the comfort of the two chairs was completed at the end of the study session. Comfort ratings showed an overall preference for the conventional chair. Increased cervical (P = .004) and lumbar muscle EMG measurements were noted after sitting in the Balans chair. Pedal cutaneous blood flow was increased by 15% in the Balans chair (P = .001). The data do not support the manufacturer's claim that the Balans chair is likely to decrease complaints of LBP.

Adult↗
PubMed1987

The development of a Somatic Amplification Rating Scale for low-back pain.

The development of a new scale, the Somatic Amplification Rating Scale (SARS), for the quantification of exaggerated (nonorganic) motor, sensory, and pain responses occurring during a standardized physical examination is described. This 13-item scale, partially based on a measure of nonorganic physical signs developed by Waddell et al, was administered to 127 low-back pain patients at an outpatient pain center. It was determined that the 13-item scale could be shortened to seven items with improved ease of administration and little loss of reliability and validity. Interrater reliability of the finalized seven-item scale was excellent (R = 0.93). Finally, it was determined that patients with high SARS scores were significantly more likely to be receiving workers' compensation benefits and to endorse physical symptoms with greater intensity on psychologic testing (Symptom Checklist 90).

Adult↗
PubMed1985

Anisocoria after anaesthesia.

Unequal pupil size following anaesthesia is an unsettling finding, suggestive of acute, perioperative intracranial pathology. We report here an unusual cause of anisocoria after anaesthesia: unintended entrance of phenylephrine nasal vasoconstrictor solution into the eye.

Anesthesia↗