Chest
Clinical InvestigationsMouth Intermittent Positive Pressure Ventilation in the Management of Postpolio Respiratory Insufficiency
Section snippets
METHOD
Seventy-five postpolio persons on MIPPV were studied. Seventy were managed in the home, five in chronic care institutions. Eight had complete quadriplegia, while 67 had varying degrees of quadriparesis. None had severe bulbar involvement. All were wheelchair dependent. The majority were mobile only in motorized wheelchairs. Twenty-seven had significant scoliosis. Sixty-six were ventilator dependent 24 hours a day and could tolerate only seconds of time free of assisted ventilation unless
RESULTS
Seventy-five respirator dependent postpolio persons were separated into three categories as a function of the amount and method of respiratory assistance. Table 1 represents those persons with no tolerance off mechanical aid who used only MIPPV 24 hours per day. Twenty-three of these persons had been dependent on aid since the onset of polio. Twenty returned to at least overnight respiratory aid an average of 18.1 years (one to 37) postpolio and subsequently progressed to full-time respirator
DISCUSSION
Respiratory insufficiency in the majority of postpolio patients is due primarily to respiratory muscle weakness. Most of our patients requiring full time aid have VCs below 1 L. In others requiring full time aid, VCs as high as 1,700 ml have been noted. These patients may have intrinsic lung disease, central hypoventilation, or a pattern of upper airway collapse and sleep apnea episodes as well as thoracic deformity. Symptoms of hypoventilation are insidious in onset but lead to cor pulmonale
ACKNOWLEDGMENTS
The authors wish to thank Marie Schultheiss, B.A.C. C.P.T., Craig Senna, C.R.T.T., Enrique Gonzalez, C.R.T.T., and Joan Adler, M.A., for their technical assistance. We also wish to thank Ms. Diane Perlman for her help in preparing this paper.
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Manuscript received July 25; revision accepted October 30.