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1.  An Alternative Approach to the Monitoring of Respiration by Dynamic Air-Pressure Sensor 
Anesthesia Progress  2007;54(1):2-6.
Monitoring and assessing of patient respiratory function during conscious sedation are important because many drugs used for conscious sedation produce respiratory depression and subsequent hypoventilation. The purpose of this study is to assess the value of a dynamic air-pressure sensor for respiratory monitoring of clothed patients. Eight clothed adult volunteers were reclined on a dental chair positioned horizontally. The air bag for measuring air-pressure signals corresponding to respiration was placed on the seat back of the dental chair in the central lumbar area of the subject. The subject breathed through a face mask with a respirometer attached for measuring expiratory tidal volume. The air-pressure signals corresponding to respiration were obtained and the time integration values for air pressure during each expiration (∫Pexp) were calculated. The expiratory tidal volume (TVexp) was measured simultaneously by respirometer. The relationship between TVexp and ∫Pexp for each subject was assessed by a Pearson correlation coefficient. A strong correlation between TVexp and ∫Pexp was observed in all subjects. Measuring ∫Pexp by dynamic air-pressure sensor makes it possible to estimate respiratory volume breath by breath, and the respiratory pressure–time integral waveform was useful in visually monitoring the respiration pattern. We believe that in the future this device will be used to monitor respiratory physiology in clothed patients, contributing to safer sedative procedures.
PMCID: PMC1821134  PMID: 17352526
Air-pressure sensor; Respiratory; Monitor; Nonrestrictively
2.  Clinical recovery time from conscious sedation for dental outpatients. 
Anesthesia Progress  2002;49(4):124-127.
For dental outpatients undergoing conscious sedation, recovery from sedation must be sufficient to allow safe discharge home, and many researchers have defined "recovery time" as the time until the patient was permitted to return home after the end of dental treatment. But it is frequently observed that patients remain in the clinic after receiving permission to go home. The present study investigated "clinical recovery time," which is defined as the time until discharge from the clinic after a dental procedure. We analyzed data from 61 outpatients who had received dental treatment under conscious sedation at the Hiroshima University Dental Hospital between January 1998 and December 2000 (nitrous oxide-oxygen inhalation sedation [n = 35], intravenous sedation with midazolam [n = 10], intravenous sedation with propofol [n = 16]). We found that the median clinical recovery time was 40 minutes after nitrous oxide-oxygen sedation, 80 minutes after midazolam sedation, and 52 minutes after propofol sedation. The clinical recovery time was about twice as long as the recovery time described in previous studies. In a comparison of the sedation methods, clinical recovery time differed (P = .0008), being longer in the midazolam sedation group than in the nitrous oxide-oxygen sedation group (P = .018). These results suggest the need for changes in treatment planning for dental outpatients undergoing conscious sedation.
PMCID: PMC2007416  PMID: 12779113
3.  Anesthetic Management of a Patient with Cornelia De Lange Syndrome 
Anesthesia Progress  1987;34(2):63-65.
Cornelia de Lange syndrome presents various problems for anesthetic management, which include anatomical anomalies of face and extremities, cardiopulmonary and endocrine disorders, renal dysfunction, epileptic EEG waves, and mental retardation. The choice of anesthetic procedure must be carefully considered in view of these abnormalities. We administered halothane anesthesia to an 11-year-old child with this syndrome who needed dental treatment. Anesthesia and postoperative course were uneventful, with the exception of a transient bronchospasm-like attack during anesthesia.
PMCID: PMC2148568  PMID: 2955721
4.  Anesthetic Management of a Patient With Kasabach-Merritt Syndrome 
Anesthesia Progress  1987;34(1):17-19.
Kasabach-Merritt syndrome presents various problems for anesthetic management, which include thrombocytopenia, bleeding tendency, and problems arising from the hemangioma mass itself. A 20-month-old female was scheduled for cryosurgery of a hemangioma on the face. Massive bleeding from the tumor was easily induced even by slight contact. The hematologic examination revealed a low platelet count and anemia. Anesthesia was induced carefully by applying an adult anesthetic mask to avoid the large tumor mass on the face and maintained with halothane and nitrous oxide/oxygen. Additional doses of prednisolone were administered before and during anesthesia to compensate for possible adrenal insufficiency due to steroid therapy which she had been receiving. Neither excessive bleeding nor any other particular complications occurred during anesthesia and surgery, and the postoperative course was also uneventful.
PMCID: PMC2186214  PMID: 3472474
5.  System of Acute Medical Support to Emergency during Dental Treatment in Japan 
Anesthesia Progress  1986;33(5):265-267.
The Resuscitation Committee of Hiroshima City Dental Association was established in 1983 in order to provide acute medical support in case of emergency during dental treatment at private dental clinics. This Committee is composed of representatives from the Hiroshima City Dental Association, Hiroshima University School of Dentistry, Hiroshima University School of Medicine, Hiroshima City Health Bureau, and Hiroshima City Fire and Ambulance Department. A portable ECG monitor with defibrillator and a resuscitation kit are held in readiness at the Hiroshima University Hospital. In case of emergency during dental treatment at a private dental clinic, we hurry to the clinic with the resuscitation set and give emergency treatment. We have been involved in two cases of emergency since this system started. Both of them recovered without any sequelae. Besides these activities, we give lectures annually to dentists and dental hygienists on the treatment of medical emergencies.
PMCID: PMC2177475  PMID: 3465266

Results 1-5 (5)