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Thermophysical Properties of Thermosoftening Nasotracheal Tubes.

Abstract

Thermosoftening treatment of polyvinyl chloride (PVC) nasotracheal tubes (NTTs) can reduce the incidence and amount of epistaxis during nasotracheal intubation. The optimal thermal setting for thermosoftening treatment of NTTs without burn injury was investigated. Two composite types of PVC NTTs were used. Following withdrawal of the PVC NTTs from a bottle of water at 45 or 60°C, the changes in the surface temperature of the NTTs were measured by infrared thermography. Hardness of the NTTs at 25, 30, 35, and 40°C was measured. The incidence of epistaxis during nasotracheal intubation using thermosoftened NTTs was evaluated retrospectively. The surface temperature of both PVC NTTs dipped in 45 and 60°C water decreased to below body temperature 30 seconds after withdrawing them from the bottles. Although thermosoftening treatment proportionally decreased the hardness of both types of NTTs, the degrees differed according to their composition. When avoiding impingement of the NTT on the posterior wall of the nasopharynx, the incidence of mild and moderate epistaxis was 2.3%. Flexibility of PVC NTTs could be obtained by thermosoftening treatment at 60°C without burn injury. Thermosoftening treatment of PVC NTTs may be useful to avoid epistaxis during nasotracheal intubation.

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  • Authors+Show Affiliations

    ,

    Assistant Professor, Department of Anesthesiology, Kindai University Faculty of Medicine, Osaka, Japan.

    ,

    Associate Professor, Department of Anesthesiology, Nara Hospital, Kindai University Faculty of Medicine, Nara, Japan.

    ,

    Professor, Graduate School of Health Sciences, Kansai University of Health Sciences, Osaka, Japan, and.

    ,

    Product Development Research Center, Daiken Medical Co Ltd, Osaka, Japan.

    Product Development Research Center, Daiken Medical Co Ltd, Osaka, Japan.

    Source

    Anesthesia progress 65:2 2018 pg 100-105

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    29952649

    Citation

    TY - JOUR T1 - Thermophysical Properties of Thermosoftening Nasotracheal Tubes. AU - Takasugi,Yoshihiro, AU - Futagawa,Koichi, AU - Umeda,Takashi, AU - Kazuhara,Kouhei, AU - Morishita,Satoshi, PY - 2018/6/29/entrez PY - 2018/6/29/pubmed PY - 2018/6/29/medline KW - Epistaxis KW - Nasotracheal intubation KW - Polyvinyl chloride tracheal tube KW - Thermography KW - Thermosoftening treatment SP - 100 EP - 105 JF - Anesthesia progress JO - Anesth Prog VL - 65 IS - 2 N2 - Thermosoftening treatment of polyvinyl chloride (PVC) nasotracheal tubes (NTTs) can reduce the incidence and amount of epistaxis during nasotracheal intubation. The optimal thermal setting for thermosoftening treatment of NTTs without burn injury was investigated. Two composite types of PVC NTTs were used. Following withdrawal of the PVC NTTs from a bottle of water at 45 or 60°C, the changes in the surface temperature of the NTTs were measured by infrared thermography. Hardness of the NTTs at 25, 30, 35, and 40°C was measured. The incidence of epistaxis during nasotracheal intubation using thermosoftened NTTs was evaluated retrospectively. The surface temperature of both PVC NTTs dipped in 45 and 60°C water decreased to below body temperature 30 seconds after withdrawing them from the bottles. Although thermosoftening treatment proportionally decreased the hardness of both types of NTTs, the degrees differed according to their composition. When avoiding impingement of the NTT on the posterior wall of the nasopharynx, the incidence of mild and moderate epistaxis was 2.3%. Flexibility of PVC NTTs could be obtained by thermosoftening treatment at 60°C without burn injury. Thermosoftening treatment of PVC NTTs may be useful to avoid epistaxis during nasotracheal intubation. SN - 1878-7177 UR - https://www.unboundmedicine.com/medline/citation/29952649/Thermophysical_Properties_of_Thermosoftening_Nasotracheal_Tubes L2 - http://www.anesthesiaprogress.org/doi/10.2344/anpr-65-02-06?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed ER -