Sampling port for hemodynamic monitoring systems
Inventors
Chelak, Todd • Illsley, Nicholas • Dennis, Nicholas
Assignees
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Publication Number
US-10835730-B2
Publication Date
2020-11-17
Expiration Date
Abstract
A medical valve has a housing with an inlet housing and an outlet housing. The interior of the inlet housing and/or the outlet housing has a contact surface. A resilient element sits within the housing and controls fluid flow through the inlet. The resilient element has a proximal portion with a normally closed aperture configured to open when actuated by a medical device. The resilient element also has a distal portion adjacent to the outlet, and a central portion between the proximal portion and the distal portion. The central portion has a wall that defines a fluid chamber in the open mode and in the closed mode. The wall has at least one projection extending radially outward. The projection maintains compressive contact with the contact surface of the housing and applies an inwardly compressive force on the resilient element, increasing the wall stiffness.
Core Innovation
The invention relates to a medical valve having an open mode that permits fluid flow and a closed mode that prevents fluid flow, and the medical valve is configured to be used in-line and in fluid communication with a pressure transducer. The medical valve includes a housing having an inlet and an outlet, and a housing interior contact surface at and/or between the inlet and/or the outlet. A resilient valve element within the housing interior controls fluid flow through the inlet and includes a normally closed aperture that opens when actuated by a medical device.
In the open mode and in the closed mode, the resilient valve element defines a fluid chamber via a wall having an interior surface, and the wall includes gland projections extending radially outwardly. In the closed mode, at least one of the gland projections and the contact surface of the housing maintain compressive contact to apply a radially inwardly compressive force on the resilient valve element. This compressive contact increases a stiffness of the wall to reduce waveform distortion as measured by the pressure transducer.
The invention further specifies structural arrangements of the gland projections, including that the gland projections are spaced apart in a circular array around a central axis to form an interrupted ring with interstices between gland projections. The wall having ribs on an inner surface correspond to the interstices, and at least one gland projection is distal of the normally closed aperture. Variations of the gland projection geometry and related compression-contact behavior are described in the disclosed embodiments to improve pressure waveform fidelity during pressure transducer readout.
Claims Coverage
The partial content identifies three independent claims directed to compressive contact in the closed mode between a housing interior contact surface and radially outward structures on a resilient valve element, with 3 inventive features.
In-line medical valve with compressive stiffening to reduce waveform distortion
A medical valve having an open mode and a closed mode, configured to be used in-line and in fluid communication with a pressure transducer, comprising a housing with an inlet and an outlet and an interior contact surface, and a resilient valve element with a body including a proximal portion forming a normally closed aperture configured to open when actuated by a medical device, a distal portion, and a central portion with a wall defining a fluid chamber in the open mode and in the closed mode; the wall has gland projections extending radially outwardly, the gland projections and the contact surface of the housing maintain compressive contact in the closed mode to apply a radially inward compressive force on the resilient valve element to increase a stiffness of the wall to reduce waveform distortion as measured by the pressure transducer; the gland projections are spaced apart in a circular array around the central axis to form an interrupted ring with interstices; the wall has ribs on an inner surface corresponding to the interstices; and at least one gland projection is distal of the normally closed aperture.
Method of reducing pressure-waveform artifacts using closed-mode compressive contact
A method of reducing artifacts from a pressure-waveform reading taken from a pressure transducer that is in-line with a medical valve having an open mode that permits fluid flow and a closed mode that prevents fluid flow, the method comprising providing a pressure transducer in-line and in fluid communication with a valve that includes a housing with an interior contact surface and a resilient valve element with a normally closed aperture; compressively contacting the gland projection with the contact surface of the housing when the valve is in the closed mode to apply a radially inward compressive force on the resilient valve element thereby increasing a stiffness of the wall; and displaying a reduced-artifact pressure waveform from the pressure transducer.
Medical valve using distal compression means with tabs and tab strips to increase wall stiffness
A medical valve having an open mode that permits fluid flow and a closed mode that prevents fluid flow, comprising a housing with an inlet and an outlet and an interior contact surface, and a resilient valve element with a body including a proximal portion forming a normally closed aperture configured to open when actuated by a medical device, a distal portion, and a central portion with a wall defining a fluid chamber in the open mode and in the closed mode; means for compression extending radially outwardly from at least one or both of the central portion and the distal portion, the compression means and the contact surface of the housing configured to maintain compressive contact to apply a radially inward compressive force on the resilient valve element when the valve is in the closed mode thereby increasing a stiffness of the wall; the compression means being distal of the normally closed aperture; and the compression means having at least two compression tabs connected by at least one compression tab strip.
Across the identified independent claims, the core claimed approach is compressive contact in the closed mode between a housing interior contact surface and radially outward structures on a resilient valve element, applying a radially inward compressive force that increases wall stiffness and reduces waveform distortion or artifacts in pressure-waveform readings taken by an in-line pressure transducer.
Stated Advantages
Reduces waveform distortion as measured by the pressure transducer.
Displays a reduced-artifact pressure waveform from the pressure transducer.
Increases a stiffness of the wall of the resilient valve element.
Documented Applications
Hemodynamic monitoring using a pressure transducer with an in-line medical valve, where improved pressure waveform fidelity is achieved during pressure transducer readout.
Reducing artifacts from a pressure-waveform reading taken from a pressure transducer in-line with a medical valve, followed by displaying a reduced-artifact pressure waveform.
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