PubMed Health⌕ Search

Biomedical subjects

Masatoshi Fukumoto

Publications and source records attributed to Masatoshi Fukumoto.

5 recordsLinked to original sources
PubMed2006

Flexible, tapered-tip tube facilitates conventional orotracheal intubation by novice intubators.

Orotracheal intubation is the standard technique for airway management, but several untoward airway complications are possible with this method. To avoid airway trauma caused by the tube tip during intubation, the Parker Flex-Tip tube (PFT), which has a flexible, tapered tip, was developed. It has been reported that the PFT facilitates fiberoptic orotracheal intubation and introducer-guided tracheal intubation. In this study, we compared the PFT to a standard endotracheal tube (SET), regarding the time of intubation during conventional orotracheal intubation and the incidence of postoperative sore throat and hoarseness. One hundred and thirty-four patients scheduled for elective anesthesia using orotracheal intubation were randomized to either the PFT or SET and 132 completed the study. The intubators were classified into three groups: staff anesthesiologists, inexperienced anesthesiologists, and anesthesia trainees. The tube was selected by another anesthesiologist and the time required for intubation was measured. PFT did not shorten the time required for intubation and did not reduce the incidence of sore throat and hoarseness. However, a detailed analysis revealed that the PFT decreased the time required for intubation in the anesthesia trainee group. The PFT may help novice intubators to conduct a smooth intubation.

Adult↗
PubMed2006

Ventilator weaning using a fenestrated tracheostomy tube with a speaking valve.

We describe two patients with tracheostomies who showed difficulty in weaning from mechanical ventilation, but were eventually weaned after use of a fenestrated tracheostomy tube with a speaking valve. The first patient underwent mechanical ventilation after pulmonary bleeding, while the second needed ventilator support because of tracheomalacia. Both patients needed only slight ventilator support but developed respiratory distress when it was discontinued. When the standard tracheostomy tube was replaced by a fenestrated tracheostomy tube with a speaking valve, each patient was easily weaned from mechanical ventilation. With a valved tube, vocal cords can exert part of their original function during expiration. The valved tube allowed the first patient to control breath-holding, and the second to avoid tracheal collapse. Regaining vocal cord function improved their pulmonary mechanics, which was demonstrated by dramatic improvement of findings on chest x-ray and computed tomography. A fenestrated tracheostomy tube is usually used to improve daily activities of patients with tracheostomies, but might be worth trying for difficult ventilator weaning.

Aged, 80 and over↗
PubMed2005

Distorted perception of smell by volatile agents facilitated inhalational induction of anesthesia.

BACKGROUND: Unpleasant smell of halogenated volatile agents is one of the frustrating factors for inhalational induction. We developed a new modification that might enable children to enjoy the smell itself while incrementally elevating sevoflurane concentration. Troposmia is usually a pathological quality change of smell perception and an olfactory stimulus is distortedly perceived in this state, which we applied to inhalational induction. METHODS: At the preoperative visit an anesthetist told the children that the smell of a facemask could be magically changed from strawberry into anything and promised to change the smell as they requested. In the operating room, a strawberry scented facemask was fitted to the face and the anesthetist announced to them that the magical change of the smell would begin when sevoflurane was added. Whether children perceived the change of the smell as they requested was investigated in the troposmia group, and resistance to fit a facemask was compared between the troposmia group and a control group. RESULTS: Significantly fewer children resisted the facemask in the troposmia group (1 of 32 vs 9 of 32; P = 0.0059). In the troposmia group 18, 22 and 25 of the 32 children said the smell of the facemask changed as they requested before they fell asleep, at the postoperative visit or both, respectively. CONCLUSIONS: Troposmia can be intentionally induced to perceive the smell of sevoflurane on request. Troposmia might contribute to promote children's participation in anesthesia induction and facilitate inhalational induction.

Anesthesia, General↗