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[Diaphragmatic reserve strength in obese patients]. / Reserva de fuerza del diafragma en pacientes obesos.
De Vito, E L; Montiel, G C; Semeniuk, G B.
Affiliation
  • De Vito EL; Instituto de Investigaciones Médicas Alfredo Lanari, Facultad de Medicina, Universidad de Buenos Aires, Argentina.
Medicina (B Aires) ; 51(6): 524-8, 1991.
Article in Es | MEDLINE | ID: mdl-7476105
Nine obese patients (OB) and seven normal subjects (N) were studied in order to determine diaphragmatic strength reserve, measured in terms of diaphragm Tension/Time Index (TTdi). This index was measured with the patients awake and during the obstructive apnea (OA) episodes. TTdi was 2.7 times superior in the OB (p < 0.0005) and was related with a lower Pdi Max (102 vs 202 cm H2O; p < 0.005) and with a higher Pdi (9 vs 6 cm H2O; p < 0.05). During OA the TTdi was higher than the threshold value to develop diaphragmatic fatigue (0.15-0.20) in three patients. This value was not exceeded in one patient because of striking paradoxical diaphragmatic movements. As for anthropometric data, DPI% range was higher and wider in OB (Table 1). The pCO2 in OB was 40 +/- 6 mmHg. In all patients (Table 3), severe hypoxia and hypercapnial were observed. TTdi evolution in an OA in 4 patients can be appreciated in Figure 3. It can be concluded that the diaphragmatic strength reserve is reduced in OB so that they are more susceptible to develop diaphragmatic fatigue. A fatigant respiratory pattern was also registered during the OA.
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Collection: 01-internacional Database: MEDLINE Main subject: Diaphragm / Obesity Type of study: Etiology_studies Limits: Adult / Female / Humans / Male / Middle aged Language: Es Journal: Medicina (B Aires) Year: 1991 Document type: Article Affiliation country: Argentina Country of publication: Argentina
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Collection: 01-internacional Database: MEDLINE Main subject: Diaphragm / Obesity Type of study: Etiology_studies Limits: Adult / Female / Humans / Male / Middle aged Language: Es Journal: Medicina (B Aires) Year: 1991 Document type: Article Affiliation country: Argentina Country of publication: Argentina