Capnography Module for PPV Masks with Sealed Access Port
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Solution Overview
Problem
Positive pressure ventilation masks cause discomfort and increase the risk of respiratory infections due to inadequate access for oral or nasal care, requiring removal of the mask for procedures which is clinically undesirable.
Innovation Solution
The development of a positive pressure ventilation mask with an access port and self-sealing valve that allows for insertion of oral care appliances without compromising the seal, enabling procedures like suctioning, capnometry, and nebulization while maintaining ventilator pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mask seal is made tight to maintain positive pressure, then ventilation effectiveness is improved, but access for oral or nasal care becomes difficult
Solution Approach 1:
The mask system is segmented into a main sealed mask body and a separate access port assembly with valve mechanism. This allows the mask to maintain its seal for ventilation while the access port provides a controlled opening for oral care procedures without compromising the overall seal integrity.
Solution Approach 2:
An access port assembly acts as an intermediary between the sealed mask interior and the external environment. This intermediary structure includes a valve mechanism that can open to allow appliances through while maintaining the seal when closed, thus mediating between ventilation requirements and access needs.
2Ease of operation
If the mask is removed to access the oral airway, then oral care can be performed, but positive pressure is lost and infection risk increases
Solution Approach 1:
The access port is pre-configured with a valve mechanism that can be opened before procedures are needed. This preliminary preparation allows oral care appliances to be introduced through the pre-opened port without requiring mask removal, thus preventing infection risk while enabling necessary procedures.
Solution Approach 2:
The access port assembly serves as an intermediary pathway that allows oral care appliances to reach the oral airway without breaching the mask seal. The valve mechanism in this intermediary structure controls the opening and closing, maintaining positive pressure while enabling procedure access.
3Ease of operation
If an access port is added to the mask, then oral care access is improved, but device complexity increases
Solution Approach 1:
The access port assembly is designed with multi-functionality to justify the added complexity. It serves multiple purposes: allowing insertion of various oral care appliances (suction, capnometry, nebulization), maintaining seal integrity during procedures, and providing a controlled interface between the sealed mask and external devices.
Solution Approach 2:
The access port assembly acts as a standardized intermediary interface that simplifies the interaction between the mask and various oral care devices. By providing a universal access mechanism, it reduces the need for multiple specialized openings or complex custom configurations for different procedures.
Data Source
AI summary
A capnography appliance module for positive pressure ventilation (PPV) includes an adapter that couples to a port on an NIV mask for sampling the CO2 of a patient. The module includes an elongate support housing sized and configured to be placed through an access port of a PPV mask. The module also includes a capnometry sampling line positioned within the support housing and having a sampling inlet for sampling oral gases from within a PPV mask. The appliance module allows clinicians to sample CO2 through the NIV mask without disrupting the therapeutic pressure.