Mahdi A. Shkoukani

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Long-term facilitation (LTF) is a prolonged increase in ventilatory motor output after episodic peripheral chemoreceptor stimulation. We have previously shown that LTF is activated during sleep following repetitive hypoxia in snorers (Babcock MA and Badr MS. Sleep 21: 709-716, 1998). The purpose of this study was 1) to ascertain the relative contribution of(More)
It has been proposed that the difference in sleep apnea prevalence is related to gender differences in upper airway anatomy and physiology. To explain the prevalence difference, we hypothesized that men would have an increased upper airway resistance and increased critical closing pressure (Pcrit) compared with women. In protocol 1, resistance at two(More)
UNLABELLED Episodic hypoxia (EH) is followed by increased ventilatory motor output in the recovery period indicative of long-term facilitation (LTF). We hypothesized that episodic hypoxia evokes LTF of genioglossus (GG) muscle activity in humans during non-rapid eye movement sleep (NREM) sleep. We studied 12 normal non-flow limited humans during stable NREM(More)
We hypothesized that long-term facilitation (LTF) is due to decreased upper airway resistance (Rua). We studied 11 normal subjects during stable non-rapid eye movement sleep. We induced brief isocapnic hypoxia (inspired O(2) fraction = 8%) (3 min) followed by 5 min of room air. This sequence was repeated 10 times. Measurements were obtained during control,(More)
Altered chemoresponsiveness has been postulated to explain the gender difference in the incidence of sleep disordered breathing (SDB). The purpose of this investigation was to ascertain a gender difference in the effect of hypocapnic hypoxia on ventilation. Hypocapnic hypoxia was induced in stable NREM sleep for 3 min periods. In the first analysis, hypoxic(More)
The physiological significance of inspiratory flow limitation (IFL) has recently been recognized, but methods of detecting IFL can be subjective. We sought to develop a mathematical model of the upper airway pressure-flow relationship that would objectively detect flow limitation. We present a theoretical discussion that predicts that a polynomial function(More)
OBJECTIVE The aim of this study was to determine whether the incidence of facial fractures has changed in the United States since 1990. STUDY DESIGN This study is a retrospective review of all nonpediatric inpatient and outpatient facilities of the Detroit Medical Center from 1990 to 2011 and weighted national inpatient estimates from 1993 to 2010 using(More)
OBJECTIVE This study aimed to evaluate factors contributing to medical negligence relevant to craniofacial surgery. METHODS Retrospective analysis of verdict and settlement reports on the Westlaw legal database for outcome, awards, physician defendants, and other specific factors raised in malpractice litigation. RESULTS Of 42 verdicts and settlement(More)
OBJECTIVES/HYPOTHESIS Otitis media (OM) is highly prevalent and represents a major public health concern. We evaluate National Institutes of Health (NIH) funding support for OM research and examine the role of otolaryngology primary investigators (PIs). STUDY DESIGN Examination of bibliometrics and funding history of NIH grant recipients. METHODS The(More)