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Suda Y, Kim YM, Ogawa T, Yasui N, Hasegawa Y, Kashihara W, Shimoyama T, Aoyama K, Nagata K, Tamura T, Kusumoto S. Chemical structure and biological activity of a lipid A component from Helicobacter pylori strain 206. ACTA ACUST UNITED AC 2001. [DOI: 10.1179/096805101101532594] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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52
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Aoyama K, Matsubara K, Kondo M, Murakawa Y, Suno M, Yamashita K, Yamaguchi S, Kobayashi S. Nicotinamide-N-methyltransferase is higher in the lumbar cerebrospinal fluid of patients with Parkinson's disease. Neurosci Lett 2001; 298:78-80. [PMID: 11154840 DOI: 10.1016/s0304-3940(00)01723-7] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Parkinson's disease (PD) may be initiated or precipitated by endogenous toxins with a structure similar to 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine in genetically-predisposed individuals. Nicotinamide N-methyltransferase (NNMT) catalyzes N-methylation of nicotinamide and other pyridines to form pyridinium ions. The protein amount of NNMT was measured in the lumbar cerebrospinal fluid of PD patients by immunoblot analysis using anti-human NNMT antibody. In younger (65 years old or younger) PD patients, the relative level of NNMT protein was significantly higher than that in younger controls. The NNMT protein was significantly affected by aging: the amount decreased along with aging in PD patients. These findings suggested that excess NNMT in the central nervous system might be implicated in the PD pathogenesis.
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Aoyama K, Takenaka I, Nagaoka E, Kadoya T, Sata T, Shigematsu A. Potential damage to the larynx associated with light-guided intubation: a case and series of fiberoptic examinations. Anesthesiology 2001; 94:165-7. [PMID: 11135738 DOI: 10.1097/00000542-200101000-00030] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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54
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Seto A, Murakami M, Fukuyama H, Niijima K, Aoyama K, Takenaka I, Kadoya T. Ventricular tachycardia caused by hyperkalemia after administration of hypertonic mannitol. Anesthesiology 2000; 93:1359-61. [PMID: 11046231 DOI: 10.1097/00000542-200011000-00036] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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55
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Aoyama K, Nagaoka E, Takenaka I, Kadoya T. New jaw support device and awake fiberoptic intubation. Anesth Analg 2000; 91:1309-10. [PMID: 11049933 DOI: 10.1097/00000539-200011000-00057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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56
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Aoyama K, Mitsubayashi Y, Aiba H, Mizuno T. Spy1, a histidine-containing phosphotransfer signaling protein, regulates the fission yeast cell cycle through the Mcs4 response regulator. J Bacteriol 2000; 182:4868-74. [PMID: 10940030 PMCID: PMC111366 DOI: 10.1128/jb.182.17.4868-4874.2000] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Common histidine-to-aspartate (His-to-Asp) phosphorelay signaling systems involve three types of signaling components: a sensor His kinase, a response regulator, and a histidine-containing phosphotransfer (HPt) protein. In the fission yeast Schizosaccharomyces pombe, two response regulators, Mcs4 and Prr1, have been identified recently, and it was shown that they are involved in the signal transduction implicated in stress responses. Furthermore, Mcs4 appears to be involved in mitotic cell-cycle control. However, neither the HPt phosphotransmitter nor His kinase has been characterized in S. pombe. In this study, we identified a gene encoding an HPt phosphotransmitter, named Spy1 (S. pombe YPD1-like protein). The spy1(+) gene showed an ability to complement a mutational lesion of the Saccharomyces cerevisiae YPD1 gene, which is involved in an osmosensing signal transduction. The result from yeast two-hybrid analysis indicated that Spy1 interacts with Mcs4. To gain insight into the function of Spy1, a series of genetic analyses were conducted. The results provided evidence that Spy1, together with Mcs4, plays a role in regulation of the G(2)/M cell cycle progression. Spy1-deficient cells appear to be precocious in the entry to M phase. In the proposed model, Spy1 modulates Mcs4 in a negative manner, presumably through a direct His-to-Asp phosphorelay, operating upstream of the Sty1 mitogen-activated protein kinase cascade.
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Takenaka I, Aoyama K, Kadoya T. Use of the univent bronchial-blocker tube for unanticipated difficult endotracheal intubation. Anesthesiology 2000; 93:590-1. [PMID: 10910522 DOI: 10.1097/00000542-200008000-00060] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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58
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Takenaka I, Kadoya T, Aoyama K. Is awake intubation necessary when the laryngeal mask airway is feasible? Anesth Analg 2000; 91:246-7. [PMID: 10866926 DOI: 10.1097/00000539-200007000-00054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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59
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Hashimoto M, Imamura Y, Morichika T, Arimoto K, Takeuchi O, Takeda K, Akira S, Aoyama K, Tamura T, Kotani S, Suda Y, Kusumoto S. Cytokine-inducing macromolecular glycolipids from Enterococcus hirae: improved method for separation and analysis of its effects on cellular activation. Biochem Biophys Res Commun 2000; 273:164-9. [PMID: 10873580 DOI: 10.1006/bbrc.2000.2921] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Previously, we showed that several minor macromolecular glycolipids accounting for less than 5% of the lipoteichoic acid (LTA) fraction from Enterococcus hirae ATCC 9790 possess cytokine-inducing activity, whereas the purified LTA does not. In other words, the immunobiological activity of the LTA fraction reported in the 1980s was not attributable to LTA itself, but to other glycolipids coexisting in the fraction. In the present study, we improved the procedure of separation of the active glycolipids and evaluated their effects on cellular activation. The immunobiologically active glycolipids were separated from the crude glycolipid fraction obtained by hot phenol-water extraction of the cells. The total yield of active glycolipids was about fivefold higher than that separated by the previous method. Interleukin-6-inducing activities of the active glycolipids from 1,25-dihydroxy vitamin D(3)-differentiated human monocytic leukemia cells, THP-1, were inhibited by anti-CD14 mAbs in a dose-dependent manner. Macrophages from Toll-like receptor (TLR)-2-deficient or -4-deficient mice completely lacked the ability to produce tumor necrosis factor-alpha on stimulation with active glycolipids. These observations indicated that the cellular activation by the active glycolipids from E. hirae is mediated by CD14 and by both TLR2 and TLR4.
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Oritani K, Aoyama K, Tomiyama Y, Kincade PW, Matsuzawa Y. Stromal cell CD9 and the differentiation of hematopoietic stem/progenitor cells. Leuk Lymphoma 2000; 38:147-52. [PMID: 10811457 DOI: 10.3109/10428190009060328] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CD9 belongs to the tetraspan family of proteins that facilitates the regulation of cell proliferation, motility, and adhesion. In mouse hematopoietic organs, CD9 is expressed by myeloid and stromal cells. Although the precise mechanisms are not clear, antibody ligation of CD9 on stromal cells regulates the adhesion between stromal cells and hematopoietic stem cells, the production of myeloid cells in long term bone marrow cultures and the differentiation of hematopoietic stem cells. A 100 kD protein co-precipitated with CD9 is distinct from several previously reported CD9-associated molecules with respect to size and distribution. Identification and analysis of this interesting protein may clarify the molecular mechanisms through which CD9 bearing stromal cells control the differentiation of hematopoietic stem cells and/or allow them to maintain their vital self-renewal capacity.
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Ravindran RS, Aoyama K, Nagaoka E, Takenaka I, Seto A. Another advantage of marking ovassapian fiber-optic intubating airway. Anesthesiology 2000; 92:1843. [PMID: 10839942 DOI: 10.1097/00000542-200006000-00050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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62
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Aoyama K, Nagaoka E, Takenaka I, Kadoya T. The McCoy laryngoscope expands the laryngeal aperture in patients with difficult intubation. Anesthesiology 2000; 92:1855-6. [PMID: 10839953 DOI: 10.1097/00000542-200006000-00068] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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63
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Oritani K, Medina KL, Tomiyama Y, Ishikawa J, Okajima Y, Ogawa M, Yokota T, Aoyama K, Takahashi I, Kincade PW, Matsuzawa Y. Limitin: An interferon-like cytokine that preferentially influences B-lymphocyte precursors. Nat Med 2000; 6:659-66. [PMID: 10835682 DOI: 10.1038/76233] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We have identified an interferon-like cytokine, limitin, on the basis of its ability to arrest the growth of or kill lympho-hematopoietic cells. Limitin strongly inhibited B lymphopoiesis in vitro and in vivo but had little influence on either myelopoiesis or erythropoiesis. Because limitin uses the interferon alpha/beta receptors and induces interferon regulatory factor-1, it may represent a previously unknown type I interferon prototype. However, preferential B-lineage growth inhibition and activation of Janus kinase 2 in a myelomonocytic leukemia line have not been described for previously known interferons.
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Aoyama K, Takenaka I, Nagaoka E, Kadoya T. Jaw thrust maneuver for endotracheal intubation using a fiberoptic stylet. Anesth Analg 2000; 90:1457-8. [PMID: 10825343 DOI: 10.1097/00000539-200006000-00044] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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65
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Aoyama K, Kawaura R, Yamada H, Aiba H, Mizuno T. Identification and characterization of a novel gene, hos3+, the function of which is necessary for growth under high osmotic stress in fission yeast. Biosci Biotechnol Biochem 2000; 64:1099-102. [PMID: 10879493 DOI: 10.1271/bbb.64.1099] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
hos3 mutants of the fission yeast Schizosaccharomyces pombe showed the phenotype of high osmolarity sensitivity for growth. An S. pombe strain carrying the hos3-M26 allele cannot form colonies on agar plates containing 2 M glucose, but the parental strain can do so very well, as demonstrated previously. The hos3+ gene was cloned and identified as one that encodes a small protein of 94 amino acids, which shows no sequence similarity to any other proteins in the current databases. A hos3delta strain, which we then constructed, had the phenotype of high osmolarity sensitivity, as in the case of the original hos3-M26 mutant. More interestingly, when these hos- cells were grown in the non-permissive growth condition in the presence of 2 M glucose, we found that unusually many septated cells were accumulated after a prolonged incubation. A multicopy suppressor gene for hos- mutations was also isolated and identified as the dsk1+ gene encoding a protein kinase, which was previously suggested to be implicated in a process of the mitotic regulation of S. pombe. The function of the hos3+ gene is discussed from these results.
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Aoyama K, Matsubara K, Fujikawa Y, Nagahiro Y, Shimizu K, Umegae N, Hayase N, Shiono H, Kobayashi S. Nitration of manganese superoxide dismutase in cerebrospinal fluids is a marker for peroxynitrite-mediated oxidative stress in neurodegenerative diseases. Ann Neurol 2000; 47:524-7. [PMID: 10762167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Peroxynitrite can nitrate tyrosine residues of proteins. We examined nitrotyrosine-containing proteins in cerebrospinal fluid of 66 patients with neurogenic disease by immunoblot analysis. Nitrated tyrosine residue-containing protein was observed in the cerebrospinal fluid and was concluded to be manganese superoxide dismutase (Mn-SOD). The nitrated Mn-SOD level was strikingly elevated in amyotrophic lateral sclerosis patients and was slightly increased in Alzheimer's and Parkinson's disease patients, whereas an elevated Mn-SOD level was observed only in progressive supranuclear palsy group.
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Uehara H, Takenaka I, Aoyama K, Kadoya T, Sata T, Shigematsu A. A new method of predicting pulmonary capillary wedge pressure: the arterial pressure ratio. Anaesthesia 2000; 55:113-7. [PMID: 10651670 DOI: 10.1046/j.1365-2044.2000.055002113.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The response of arterial blood pressure to an increase in intrathoracic pressure has been shown to be predictive of pulmonary capillary wedge pressure. We devised a new method, which we termed the arterial pressure ratio. We defined arterial pressure ratio as the ratio of systolic blood pressure of the final beat during the strain phase of the Valsalva manoeuvre to that during apnoea before the manoeuvre, and tested the accuracy of arterial pressure ratio in predicting pulmonary capillary wedge pressure. In 30 patients scheduled for elective abdominal aortic reconstruction, following induction of general anaesthesia and tracheal intubation, a 20-G catheter and pulmonary artery catheter were inserted through the radial artery and right internal jugular vein, respectively. Pulmonary capillary wedge pressure was then measured during a brief period of apnoea and the Valsalva manoeuvre was performed by application of pressure to the reservoir bag. Airway pressure was maintained at 30 cmH2O for 10 s and then released. Radial arterial pressure and airway pressure were recorded simultaneously, and arterial pressure ratio was calculated. There was a close linear correlation between arterial pressure ratio and pulmonary capillary wedge pressure (r = 0.88, p < 0.0001).
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Aoyama K, Matsuda T, Aoki N. Characterization of newly identified four isoforms for a putative cytosolic protein tyrosine phosphatase PTP36. Biochem Biophys Res Commun 1999; 266:523-31. [PMID: 10600535 DOI: 10.1006/bbrc.1999.1845] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In the course of determining the expression profiles of protein tyrosine phosphatases in lactating mammary gland, we found the expression of an isoform for a putative cytosolic and cytoskeleton-associated protein tyrosine phosphatase PTP36. Further detailed RT-PCR and Northern blot analyses revealed the expression of several isoforms for PTP36 in a tissue-dependent manner. We have cloned the cDNAs encoding four truncated isoforms for PTP36 and designated PTP36-A, -B, -C, and -D, respectively. PTP36-A and -C had new sequences generated due to frameshift, whereas PTP36-B and -D were in-frame variants. Gly- and Glu-rich domains and a putative PTP domain were missing from PTP36-A, but the band 4.1 domain remained. PTP36-B retained the band 4.1 and PTP domains but lacked Pro-, Gly- and Glu-rich domains. Most domain structures were lacking in PTP36-C and -D. Interestingly, PTP36-C contained an incomplete band 4.1 domain, but the newly created sequence exhibited high homology to human nebulette, which was also suggested to associate with cytoskeletons. When transiently expressed in COS7 and HEK293 cells, not only the wild type but also all the isoforms were recovered in Triton X-100-insoluble cytoskeleton-associated fractions and this distribution was not affected by mechanical cell detachment and treatment with a kinase inhibitor staurosporine. Such cellular distribution of PTP36 was also observed in stable COS7 clones. Further studies using deletion mutants suggested that the first 30 amino acids as well as the band 4.1 domain of PTP36 were involved in association with Triton X-100 insoluble cytoskeletons. Tissue-dependent expression and deletion in domain structures might reflect the biological significance of the isoforms for PTP36 in certain physiological conditions.
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Takenaka I, Aoyama K, Nagaoka E, Seto A, Niijima K, Kadoya T. Malposition of the epiglottis after tracheal intubation via the intubating laryngeal mask. Br J Anaesth 1999; 83:962-3. [PMID: 10700803 DOI: 10.1093/bja/83.6.962] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The intubating laryngeal mask has been reported to be a successful method of tracheal intubation although advancement of the tracheal tube via the laryngeal inlet into the trachea cannot be seen. Damage to the larynx or other tissues may occur during blind passage of a tracheal tube. We report a case in which the tracheal tube, advanced blindly, tucked the epiglottis into the laryngeal inlet, resulting in oedema of the epiglottis. This case illustrates the potential for airway obstruction after extubation when using the intubating laryngeal mask as a blind intubation guide.
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Kadoya T, Seto A, Aoyama K, Takenaka I. Development of rapid atrial fibrillation with a wide QRS complex after neostigmine in a patient with intermittent Wolff-Parkinson-White syndrome. Br J Anaesth 1999; 83:815-8. [PMID: 10690151 DOI: 10.1093/bja/83.5.815] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We report the case of a 67-yr-old man with intermittent Wolff-Parkinson-White (WPW) syndrome in whom neostigmine produced life-threatening tachyarrhythmias. The patient was scheduled for microsurgery for a laryngeal tumour. When he arrived in the operating room, the electrocardiogram showed normal sinus rhythm with a rate of 82 beat min-1 and a narrow QRS complex which remained normal throughout the operative period. On emergence from anaesthesia, the sinus rhythm (87 beat min-1) changed to atrial fibrillation with a rate of 80-120 beat min-1 and a normal QRS complex. We did not treat the atrial fibrillation because the patient was haemodynamically stable. Neostigmine 1 mg without atropine was then administered to antagonize residual neuromuscular block produced by vecuronium. Two minutes later, the narrow QRS complexes changed to a wide QRS complex tachycardia with a rate of 110-180 beat min-1, which was diagnosed as rapid atrial fibrillation. As the patient was hypotensive, two synchronized DC cardioversions of 100 J and 200 J were given, which restored sinus rhythm. No electrophysiological studies of anticholinesterase drugs have been performed in patients with WPW syndrome. We discuss the use of these drugs in this condition.
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Aoyama K, Takenaka I. [Patil-Syracuse mask for fiberoptic intubation]. MASUI. THE JAPANESE JOURNAL OF ANESTHESIOLOGY 1999; 48:1262-6. [PMID: 10586569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Patil-Syracuse mask, recently introduced in Japan, has a port for fiberscopy. A fiberoptic bronchoscope and an endotracheal tube can be passed through the port with little air leakage. Positive pressure ventilation can be continuously maintained using this mask during fiberoptic intubation. This mask is particularly useful when a patient can be easily ventilated through a face mask but the trachea is unexpectedly difficult to intubate. With a modified endoscopy mask technique, the mean expiratory tidal volume of 10 ml.kg-1 could be obtained during fiberoptic orotracheal intubation. We describe a fiberoptic intubation technique using this mask, and discuss the complications and limitations of this method.
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Yamamoto T, Aoyama K, Takenaka I, Kadoya T, Uehara H. [Light-guided tracheal intubation using a Trachlight: causes of difficulty and skill acquisition]. MASUI. THE JAPANESE JOURNAL OF ANESTHESIOLOGY 1999; 48:672-7. [PMID: 10402828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
We studied the reasons why tracheal intubation using a lighted stylet (Trachlight) was sometimes difficult for unexperienced intubators. We also examined light-guided intubation skill acquisition in inexperienced anesthesiologists. Two anesthesiologists, with no prior experience in using a Trachlight, performed orotracheal intubation using a Trachlight in 60 anesthetized patients (30 patients each). During intubation, an assistant observed the advancement of the tracheal tube using a fiberscope passed nasally and recorded the reason for difficulty in intubation. The time to successful intubation was also measured. Data were divided into epochs of 10 cases, and the intubation time and the incidence of difficult cases were compared between the groups. Tracheal intubation was successful using the Trachlight in 59 of 60 patients. The incidence of difficult cases, defined as cases requiring two or more attempts, was 31.7%. Fiberscopy showed that when the tube tip was located in the vallecula or in the esophagus, it was sometimes difficult to determine the position of the tube tip by transillumination of the soft tissues of the neck, and this results in the need for multiple attempts. Both the intubation time and the incidence of difficult cases decreased significantly between the first and last epoch. The present study confirms that light-guided intubation is sometimes difficult when the tube tip is advanced to the vallecula or to the esophagus. An acceptable level of skill in light-guided intubation is achieved within 30 uses.
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Seto A, Aoyama K, Takenaka I, Kadoya T. Ventilation difficulties through the intubating laryngeal mask. Anesth Analg 1999; 88:1181-2. [PMID: 10320191 DOI: 10.1097/00000539-199905000-00039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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