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Biomedical subjects

F S Miyazaki

Publications and source records attributed to F S Miyazaki.

9 recordsLinked to original sources
PubMed1997

The Bonney test: a reassessment.

OBJECTIVE: The purpose of this study was to reassess the effects of the Bonney test versus direct urethral compression and to introduce the Miyazaki-Bonney test. STUDY DESIGN: Thirty-seven patients with a diagnosis of genuine stress incontinence were studied. Each patient underwent a classic Bonney test, direct urethral compression, and a Miyazaki-Bonney test, while the following observations and measurements were made: (1) urethroscopic observation of the bladder neck and proximal urethra, (2) cotton swab resistance to withdrawal, and (3) proximal urethral pressure changes with use of a microtip catheter. In 16 of the patients cough pressure transmission (pressure transmission ratio) to the proximal urethra was measured before and during a Bonney test. Apart from the study group, four patients with clinical type III urethras were evaluated with the Bonney and Miyazaki-Bonney tests. RESULTS: The effects of the Bonney test and direct urethral compression were grossly different on urethroscopy, cotton swab resistance to withdrawal, and proximal urethral pressure changes. With the Bonney test, the average increase in urethral pressure was 52 cm H2O, whereas with direct urethral compression the urethral pressure was >250 cm H2O. With the Miyazaki-Bonney test there was little or no change in urethral pressure. Cough pressure transmission ratios before the Bonney test averaged 64%, whereas during the Bonney test they averaged 152%. The Miyazaki-Bonney tests did not prevent leakage in three patients with type III urethras. CONCLUSION: The Bonney test does not work by direct urethral compression but instead appears to produce continence by restoring the anterior vaginal wall hammock. The Miyazaki-Bonney test duplicates the effects of the Burch bladder neck suspension and may still be a valid prognosticator of surgical success. A modified Bonney test that can be standardized is presented as the Miyazaki-Bonney test.

Cough↗
PubMed1987

Intrauterine monitoring of contractions during breast stimulation.

Thirty-six patients with ruptured membranes and absent or infrequent uterine contractions underwent breast stimulation. The intensity and frequency of contractions were measured by an intrauterine pressure catheter. Unilateral breast stimulation produced uterine contractions with an average intensity of 48 mmHg and frequency of 3.6 minutes. In patients with previously infrequent contractions, unilateral breast stimulation significantly increased the frequency of contractions without changing the intensity. During breast stimulation, half of the patients experienced tachysystole (ie, contractions more frequently than two minutes apart), and five of 36 had prolonged contractions (ie, lasting more than 90 seconds). However, tachysystole and prolonged contractions rarely produced fetal heart rate decelerations.

Breast↗
PubMed1987

Miya Hook ligature carrier for sacrospinous ligament suspension.

The Miya Hook ligature carrier makes sacrospinous ligament suspension of the prolapsed vagina or uterus easier and safer. Seventy-four procedures were performed in a 24-month period, chiefly by residents in training. There were no hemorrhages or injuries to nerve or rectum. The coccygeus muscle and sacrospinous ligament are one and the same fibromuscular structure.

Female↗
PubMed1985

Saline amnioinfusion for relief of repetitive variable decelerations: a prospective randomized study.

A prospective randomized study was undertaken in order to further investigate the effect of intrauterine saline amnioinfusion for the relief of repetitive variable decelerations in the first stage of labor. Intrauterine saline amnioinfusion corrects the oligohydramnios that makes the cord more vulnerable to compression during uterine contractions. Included in this study were 96 patients who had repetitive variable decelerations not relieved either by changes in position or by oxygen. Randomization resulted in 49 patients in the infusion group and 47 patients in the noninfusion group. Relief of variable decelerations was 51% in the infusion group, as compared to 4.2% in the noninfusion group. Relief of variable decelerations was more dramatic in the nulliparous infusion group (66.7%) than in the noninfusion group (0%). In the nulliparous patients there was a significant decrease in the rate of cesarean sections for fetal distress, being 14.8% in the infusion group as compared to 47.6% in the noninfusion group. This study clearly showed that saline amnioinfusion is a logical, simple, safe, and effective therapy for the relief of repetitive variable decelerations in the first stage of labor and can lower the incidence of cesarean sections for fetal distress in nulliparous patients. Furthermore, amnioinfusion was much superior to changes in position in treating repetitive variable decelerations.

Amnion↗
PubMed1983

Saline amnioinfusion for relief of variable or prolonged decelerations. A preliminary report.

Variable decelerations are of frequent concern to the practicing obstetrician. Oligohydramnios resulting in cord and/or placental compression is probably the most common cause of variable decelerations. We performed intrauterine saline amnioinfusion in 42 patients having repetitive variable or prolonged decelerations that did not respond to conventional therapy, such as maternal position changes and oxygen administration. Saline amnioinfusion was effective for relief of repetitive variable decelerations in 19 of 28 patients and prolonged decelerations in 12 of 14 patients. No neonatal or maternal complications occurred. This preliminary study suggests that amnioinfusion therapy may become a useful adjunct in the management of repetitive variable and prolonged decelerations.

Adult↗
PubMed1981

False reactive nonstress tests in postterm pregnancies.

One hundred twenty-five postterm patients with reactive nonstress tests (NSTs) were studied between January, 1978, and September, 1979. Ten poor outcomes occurred for a false reactive rate of 8%. Included were four antepartum deaths, one neonatal death, one brain-damaged infant, and four cases of fetal distress on admission. The NST was misleading by giving false reassurance of fetal well-being. The major mechanism causing acute fetal distress was cord compression, which frequently occurred with uteroplacental insufficiency, but occasionally without it. The oxytocin challenge test (OCT) was useful in unmasking problems of cord compression and may be a more sensitive indicator of fetal well-being and distress in the postterm patient.

Adult↗