Evaluation of pharyngeal dysphagia with manofluorography

McConnel, Fred M. S.; Cerenko, Danko; Hersh, Theodore; Weil, Leslie J.

doi:10.1007/bf02414425

Cited by 54 publications

(20 citation statements)

References 20 publications

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“…Thus, it is counterintuitive that positive subglottic air pressure, which inhibits the laryngeal closure reflex, would improve swallowing in patients with tracheotomy [9,11-13]. Alternatively, it appears convincing that efficient bolus transport is due primarily to tongue driving force aided secondarily by a combination of clearing forces from contraction of the pharyngeal walls and pharyngeal shortening [30][31][32][33]. Subglottic air pressure, therefore, may not be a key component for success during the swallow, but positive subglottic pressure can aid in clearance of residual bolus from the upper airway, i.e., a cough, if necessary, after the swallow [10,16,17,24,25].…”

Section: Discussionmentioning

confidence: 99%

“…What is of primary importance is tongue driving force accompanied by pharyngeal shortening and contraction [30][31][32][33]. Research using pharyngeal and esophageal manometry is currently underway to investigate whether there are specific areas of pressure changes during swallowing in both aspirating and nonaspirating patients with tracheotomy.…”

Section: Discussionmentioning

confidence: 99%

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Effect of a One-Way Tracheotomy Speaking Valve on the Incidence of Aspiration in Previously Aspirating Patients with Tracheotomy

Leder

1999

Dysphagia

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The purpose of the present study was to investigate the incidence of aspiration in previously aspirating patients with tracheotomy after use of a one-way tracheotomy tube speaking valve. Twenty consecutive inpatients from the acute care setting of a large urban tertiary care teaching hospital were included. All subjects had objective documentation of aspiration by a fiberoptic endoscopic evaluation of swallowing prior to placement of a one-way tracheotomy speaking valve, from 2 to 7 days of valve use with intelligible speech production, and no surgery to the upper aerodigestive tract except tracheotomy. Results indicated that incidence of aspiration was not affected by use of a one-way tracheotomy speaking valve. These results are in agreement with previous observations that subjects either aspirated or swallowed successfully regardless of tracheotomy tube occlusion status. Also, no significant differences were found between aspiration status and time since tracheotomy, time off ventilator, or duration of valve use. It was concluded that use of a one-way speaking valve provided mostly nondeglutitive benefits and should not be considered to promote successful swallowing for patients with tracheotomy in the acute care setting.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of a One-Way Tracheotomy Speaking Valve on the Incidence of Aspiration in Previously Aspirating Patients with Tracheotomy

Leder

1999

Dysphagia

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“…It also permits quantification of the swallowing act by measuring different parameters; in this study, attention was focused on the TDF and the HSP. These parameters are calculated using specifically designed software and in accordance with the guidelines expressed by McConnel et al [4,8], Mendelsohn and McConnel [9], and Cerenko et al [10].…”

Section: Methodsmentioning

confidence: 99%

Mechanisms Involved in Postdeglutition Retention in the Elderly

et al. 1997

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This study examines possible quantifiable causes of postdeglutition pharyngeal retention in the elderly. Manofluorography and computer processing of video images are performed. Retention in the valleculae and in the piriform sinuses is associated with a markedly reduced pharyngeal shortening, a low tongue driving force (TDF), and a diminished amplitude of the pharyngeal contraction. There is no relationship with the hypopharyngeal suction pump (HSP). Retention limited to the valleculae is associated with a low TDF, and retention restricted to the piriform sinuses is accompanied by a reduced pharyngeal shortening.

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“…A systematic investigation of dysphagia also calls for the development of a biomechanical model of swallowing that requires the knowledge of kinematics and kinetics of this physiological phenomenon in addition to the physical properties of the tissues involved at every phase of normal and abnormal swallowing. Some progress has been made in the biomechanical investigation of the oral phase [2,3] and the esophageal phase [4,5] of swallowing, but the biomechanical understanding of the pharyngeal phase of swallow is still at a formative stage.…”

mentioning

confidence: 99%

Comparison of Viscoelastic Properties of the Pharyngeal Tissue: Human and Canine

1999

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The viscoelastic properties of the human and canine pharyngeal tissue in tension were evaluated, based on both an experimental protocol-consisting of cyclic load, tensile stress relaxation, and incremental step load tests-and the quasi-linear viscoelastic theory. The reduced stress relaxation function and the elastic response of the pharyngeal tissues were derived from the experimental results specifically obtained from those tissues. The characteristic features of viscoelastic property were obtained for both human and canine pharyngeal tissues by applying the quasi-linear viscoelastic theory and compared with each other. The material properties of the pharyngeal tissue were sought to facilitate the three-dimensional biomechanical model of the pharyngeal function by using the finite element method.

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Evaluation of pharyngeal dysphagia with manofluorography

Cited by 54 publications

References 20 publications

Effect of a One-Way Tracheotomy Speaking Valve on the Incidence of Aspiration in Previously Aspirating Patients with Tracheotomy

Effect of a One-Way Tracheotomy Speaking Valve on the Incidence of Aspiration in Previously Aspirating Patients with Tracheotomy

Mechanisms Involved in Postdeglutition Retention in the Elderly

Comparison of Viscoelastic Properties of the Pharyngeal Tissue: Human and Canine

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