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T Utumi

Publications and source records attributed to T Utumi.

4 recordsLinked to original sources
PubMed1994

[Volume pulse wave and respiratory diseases].

We always record the volume pulse wave and oxygen saturation by using a pulse oximeter. The volume pulse wave fluctuation was induced by respiration; we have used this phenomenon to diagnose or assess respiratory diseases. First, differential diagnosis of sleep disorders, that is, central apnea, obstructive apnea, and respiration in upper airway resistance, by using only a pulse oximeter. Second, we used this phenomenon to evaluate dyspnea. When a big volume pulse wave fluctuation exists, most patients feel dyspnea, if they are awake and alert. Then, we monitored coughs by recording the volume pulse wave. Due to the pleural pressure change induced by the cough, the volume pulse wave reveals a characteristic form. This form changes with the intensity of the cough. Then we can evaluate the frequency and intensity of the cough. For recording the volume pulse wave, the pulse oximeter will be widely applicable in respiratory diseases.

Asthma↗
PubMed1993

Evaluation of threatened preterm delivery by transvaginal ultrasonographic measurement of cervical length.

OBJECTIVE: To establish a nomogram for the length of the uterocervical canal and to determine whether this can be used to predict preterm delivery. METHODS: Cervical length was measured by transvaginal ultrasonography in 32 women (21 primigravid, 11 multigravid) with threatened preterm delivery, and in 177 normal singleton pregnancies between 18-37 weeks' gestation. Regression analysis was used to create the nomogram. Student t test was used to compare the groups. RESULTS: A linear relationship was found between cervical length and gestational age (r = -0.4, P < .001). Comparison of cervical length on admission in the patients with threatened preterm delivery showed that 11 preterm deliveries occurred in women who had a mean cervical length of 23.2 mm (range 17-29), whereas 21 term deliveries occurred in women with a mean cervical length of 31.7 mm (range 21-42). The difference was significant (P < .001). A cervical length of less than 20 mm on admission had a positive predictive value of 100%. These patients had preterm delivery despite tocolytic therapy during hospitalization. CONCLUSION: The risk of preterm delivery is high in women whose cervical length on admission is less than 30 mm, and strict management is required for those with a cervical length of less than 20 mm.

Abortion, Threatened↗