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論文
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染矢, 富士子 ; 立野, 勝彦 ; 八幡, 徹太郎 ; 山口, 朋子 ; 池永, 康規
概要:
金沢大学大学院医学系研究科機能障害学<br />肺切除術を受け合併症のなかった88名について術後早期の肺機能と運動耐容能を検討した.術後の評価は,平地歩行が普通にできるHugh-JonesのGrade2になった時点とし,術後平均日数は17日
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であった.術後の肺機能は,肺活量は減少したが分時換気量が維持され,1回換気量の減少に対して呼吸数の増加による代償が認められることが示された.しかし,運動耐容能については,嫌気的代謝閾値での心拍数は術前後で差がなく,術後の酸素消費量と運動負荷量が低下した.この運動耐容能の低下は,文献的考察も加えたところ,換気当量および心拍出量の低下の影響が大きいと考えられた.(リハ医学1999;36:533-536) The major purpose of this investigation was to assess the early effects of lung resection on pulmonary function and the anaerobic threshold (AT) by means of a cycle ergometer exercise test. Eighty-eight patients (mean age:61 years) who underwent lung resection without severe cardiopulmonary or other complications were evaluated pre-and postoperatively. We assessed the patients postoperatively after a mean period of 17 days, when they had recovered sufficiently to be able to walk on a level floor at an ordinary pace without dyspnea (Grade 2 by Hugh-Jones). After resection, vital capacity was significantly reduced, but minute ventilation was not reduced indicating ventilative compensation by ventilation rate for loss of tidal volume. However, oxygen consumption (VO_2) and exercise load at the AT were reduced even though heart rate (HR) did not change after resection. On the other hand, postoperative VO_2 at rest was the same as before resection despite of an increase in HR. Thus, the early effect of lung resection on pulmonary function was compensated for by activated ventilation, however, it appears that postoperative reduction in exerdse load at the AT might be mainly due to deteriorations of ventilation equivalent and cardiac output. (Jpn J Rehabil Med 1999;36:533-536)
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| 2.
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論文
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田中, 志信 ; 山越, 憲一 ; 野川, 雅道 ; Tanaka, Shinobu
概要:
近年の「健康維持・体力向上」機運の高まりを受けて，個々人の「体力」を簡便に客観評価可能な指標を見出すべく，健常成人65名を対象にエルゴメータによる運動負荷実験を行い呼吸・循環及び乳酸代謝の負荷応答を測定・解析した．その結果，従来体力指標とし
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て用いられてきた嫌気的代謝閾値（AT）及び乳酸性閾値（LT）の出現点（負荷値）と，無侵襲的に得られた循環応答曲線の変曲点における負荷値との間に良好な直線相関があり，代替指標と成り得る可能性を確認した．<br />To develop a non-invasive and conventional physical fitness index, incremental ergometer exercise tests were carried out in 65 young adults. During the experiments cardiopulmonary parameters and blood lactate concentrations were simultaneously monitored. From the results obtained, it was clearly demonstrated that the value the work load at which the anaerobic threshold(AT) or the blood lactate threshold(LT) appeared could be estimated from the inflection point of non-invasively obtained cardiovascular responses, suggesting availability of this inflection point as a conventional alternative for AT or LT.<br />研究課題/領域番号:24650443, 研究期間(年度):2012-04-01 – 2014-03-31
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| 3.
論文 |
論文
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田中, 志信 ; Tanaka, Shinobu
概要:
健診レベルで適用可能な健康寿命延伸のための新たな簡易健康指標を見出すべく,無侵襲心拍出量計測装置を用いて3種類(一定・多段階増加・Ramp)のエルゴメータ負荷に対する循環機能の応答を計測し,運動者と非運動者の違いを検討した.その結果, Ra
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mp負荷に対する「最大心拍数に対する心拍数の割合(% HRmax)と「規格化一回拍出量(nSV)」の関係から心予備力を心機能の二つの側面、即ち変時作用(Chronotropic state : CS)と変力作用(Inotropic state : IS)の側面から定量評価可能と考えられた.また呼気ガス分析装置との同時計測実験の結果、負荷強度に対するnSVの変曲点と嫌気的代謝閾値: ATとの間に相関が見られ、ATの代替指標としてのnSVの有用性を示唆する結果が得られた.<br />To develop a novel index for assessing individual physical fitness condition, preliminary experiments for non-invasively monitoring hemodynamic parameters were carried out. Using an electrical admittance cardiograph, heart rate(HR), stroke volume(SV) and cardiac output(CO) during ergometer exercise were non-invasively measured in twelve(6 trained and 6 untrained) healthy male adults. From the results obtained, it was suggested that, using the relationship between% HRmax and SV normalized by the mean value of the rest condition, we could estimate individual cardiac reserve in terms of chronotropic and inotropic state.<br />研究課題/領域番号:22650136, 研究期間(年度):2010–2011
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