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Biomedical subjects

I Shapiro

Publications and source records attributed to I Shapiro.

At least 91 records · Page 5Linked to original sources
PubMed1976

Hearing aid fitting by prescription.

A procedure for the specification of hearing aid response characteristics is described. Thresholds of discomfort and most comfortable levels for narrow bands of noise centered at 0.25, 0.5, 1, 2, 3 and 4 kHz are determined. The thresholds of discomfort relate to the maximum power output of the hearing aid and the most comfortable levels determine the gain and frequency response that will be required. The data derived from these measurements are given to the hearing aid dispenser who provides a hearing aid that matches the prescribed response characteristics. This technique requires less time than the conventional hearing aid evaluation procedure, and it provides the audiologist with measures of auditory function that can be directly related to hearing aid parameters.

Audiometry↗
PubMed1975

Prediction of most comfortable loudness levels in hearing aid evaluation.

Most comfortable loudness levels (MCLs) are used to determine the gain required in hearing aids. The relationship between MCL and the midpoint between pure-tone threshold and threshold of discomfort was evaluated to see if the MCL could be predicted from the midpoint values. The range of differences between midpoint and MCL precluded making such predictions.

Adolescent↗
PubMed1975

Congenital mitral stenosis.

This report presents a 15 year review of the surgical treatment of 9 patients with congenital mitral stenosis seen at the Columbus Children's Hospital. The over-all mortality rate was 45 per cent. Seven patients had associated lesions, mostly coarctation of the aorta and patent ductus arteriosus. In the planning of the operative procedure, distal obstructive lesions of the left heart should generally be relieved first. The mitral valve should be explored with the use of cardiopulmonary bypass and the anatomic type of the valve determined. Type I valves will often respond to open valvulotomy, whereas Type II and III valves must be replaced.

Adolescent↗