David's valve had a significant impact on the role of speech-language pathologists and respiratory therapists in providing communication and swallowing therapy for tracheostomy and ventilator dependent patients. Prior to the PMV, respiratory therapists were primarily consulted for airway management and monitoring of patients' ventilator systems without having any effective means available to communicate with their patients. Education on communication issues for the patient population was not offered. Course textbooks, curriculum and entire clinical programs lacked education regarding the specific needs of these patients and their need to communicate. Educational seminars on communication for tracheostomized and ventilator dependent patients did not exist and almost no research was published on the topic. Until David made his valve available, there was little awareness of the tragic and unnecessary silence of this entire patient population.

Advancements in Tracheostomized and Ventilator Dependent Patient Care
Since the introduction of David's valve, new opportunities for patients and professionals have emerged. Speech-language pathologists and respiratory therapists are now leading interdisciplinary teams of clinicians from pulmonology, otolaryngology, nursing, rehabilitation and occupational therapy departments. These diverse team members work together to assess, recommend and carry-out treatment interventions for tracheostomized and ventilator dependent patients. The PMV facilitates this interaction, creating a dynamic and comprehensive approach to patient care that increases the effectiveness of the clinicians and the healing of the patient. For speech-language pathologists, the PMV is a valuable, non-invasive treatment intervention for dysphasia, facilitating therapy and enhancing patient outcomes. For respiratory therapists, the valve is an effective treatment for aspiration, secretion management, infection control and weaning. As a result of the PMV, clinicians from all disciplines are able to communicate with their patients and better treat them through successful management of these common complications.