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Biomedical subjects

I Satoh

Publications and source records attributed to I Satoh.

At least 73 records · Page 4Linked to original sources
PubMed1981

Conditions of clinical recovery from partial facial palsy caused by injury to a branch of the facial nerve.

This study was conducted to elucidate the pattern of clinical recovery from partial facial palsy caused by injury to a branch of the facial nerve in rabbits. In the experiment, the state of recovery from palsy was investigated by observing the movement of the m. orbicularis oris of the rabbit at the time of food intake, as well as by observing the evoked wave and muscle contraction caused by nerve stimulation, and the muscle contraction caused by muscle stimulation. Recovery from peripheral facial nerve palsy is complete within 1 month after nerve impairment if over half of the nerve fibers of the impaired nerve are maintained intact without degeneration.

Animals↗
PubMed1978

Evoked electromyographic test applied for recurrent laryngeal nerve paralysis.

This study was performed to apply the evoked electromyographic (EMG) test to the larynx and to find out whether or not this test is useful for diagnosis of patients with recurrent laryngeal nerve paralysis. As a result, it was considered that the present test was useful for the following: 1. Diagnosis of the site of lesion: The decision is easily made whether the recurrent laryngeal nerve is damaged alone or together with the superior laryngeal nerve, and on the site of damages along the recurrent laryngeal nerve in some cases. 2. Determination of prognosis: The cases showing no evoked wave may not recover completely. For the cases showing an evoked wave, information on prognosis can be obtained from the degree of changes in latency and evoked wave form. 3. Indication of the state of nerve regeneration: The evoked EMG test is able to reveal the state of reinnervation of the paralyzed laryngeal nerve as well as and even earlier than the ordinary EMG test.

Adult↗
PubMed1977

A demand diaphragm pacemaker.

A PACO2 feedback control system (demand diaphragm pacemaker) was developed in this laboratory to maintain homeostasis during diaphragm pacing, thus avoiding hypo- or hyperventilation. Application of this system to the research animal made it possible to maintain blood gases and pH within normal limits for up to 15 hrs. Oscillation between maximal tidal volume and apnea that occurred with the amplitude feedback control was eliminated by using a rate feedback control. A possible additional benefit of a feedback control system is the reduction of current applied to the nerve as compared to that in asynchronous pacing, thereby minimizing the fatigue phenomenon.

Animals↗
PubMed1976

Patulous Eustachian tube. A new treatment with infusion of absorbable gelatin sponge solution.

For the treatment of abnormally patent Eustachian tube, we had previously employed repeated tubal insufflation of salicylic acid-boric powder (1:4) through a Eustachian tube catheter. Such treatments, however, usually were associated with uncertain results and numerous complications. Therefore, treatment of this condition was changed to employment of an infusion of absorbable gelatin sponge solution directly into the Eustachian tube. Twenty-two ears in 16 patients recovered successfully when this method was used.

Adult↗
PubMed1975

Blood flow of the superior and inferior venae cavae in cardiogenic shock: a study with an emphasis of the role of the stretch receptors in the low pressure system.

Blood flow of the superior (SVC) and inferior venae cavae (IVC) was simultaneously and separately measured with two cannulating type electromagnetic blood flow probes inserted into the SVC and IVC of thirty two dogs during hypotensive and low cardiac output states in hemorrhagic shock and cardiogenic shock. Blood flow ratio of teh IVC to total venous return was expressed by IVCF/CO (per cent). It was 66.3 per cent in normal condition, but was decreased to 54.3 per cent in hemorrhagic shock. In four cardiogenic shock models, however, IVCF/CO changes little from the control to the initial phase of shock state. At least in part, the marked decrease of venous return from the IVC region in hemorrhagic shock was considered due to the increase of sympathetic nerve activity in that region mediated by baro-receptors in the high pressure system. The unchanged blood flow ratio of the SVC and IVC in cardiogenic shock was assumed that the high atrial or high ventricular endodiastolic pressure was an inhibitory factor of the sympathetic nerve activity by activating the stretch receptors existing the low pressure system including left ventricle. This hypothesis was proved by the experiments in which the renal vascular resistance was suppressed by stretch of the left atrium by either extraatrial mechanical traction or intraatrial balloon inflation in hemorrhagic shock or intracardiac decompression during cardiopulmonary by pass.

Animals↗