Devices, systems, and methods for medical cleaning valves
A medical cleaning valve (or cleaning valve) may be configured to provide cleaning functionality to fluid (e.g., air and water) channels of an endoscope. Many embodiments described herein may include a cleaning valve (or valve) that is appropriate for single-use and therefore may be disposable. Accordingly, the valve may be made from a limited number of parts and materials, e.g., to limit its cost and/or manufacturing complexity. For example, multiple seals may be integrally formed with a valve stem. In another example, the valve may have an interface member, which may combine and simplify the functionality of a number of components, such as by connecting the valve stem to a valve well, sealing an opening to a lumen in the valve stem, and/or biasing the valve stem into a position relative to the valve well.
1. A valve for a medical device, comprising:
a valve stem including a proximal end, a distal end, one or more orifices, and a lumen in fluid communication with at least one orifice in the one or more orifices; and
one or more seals positioned between the proximal and distal ends of the valve stem, wherein the valve stem and the one or more seals comprise a monolithic, unitary structure; and
an interface member configured to couple with the valve stem and surround a first seal of the one or more seals when the interface member is coupled with the valve stem.
2. The valve of claim 1 , wherein the valve stem and the one or more seals are formed from a polymer.
3. The valve of claim 1 , wherein the proximal end of the valve stem comprises a first orifice of the one or more orifices.
4. The valve of claim 1 , wherein the interface member is configured to seal the first orifice of the one or more orifices when the valve stem is coupled with the interface member.
5. The valve of claim 1 , wherein the one or more orifices comprise first and second orifices positioned between the proximal and distal ends of the valve stem.
6. The valve of claim 5 , wherein the one or more seals comprise first and second seals positioned between the first and second orifices.
7. The valve of claim 6 , wherein the one or more seals comprise a third seal positioned distal of the first and second orifices.
8. The valve of claim 1 , wherein the one or more seals includes a seal with a first portion having a first thickness and a second portion having second thickness thinner than the first thickness.
9. The valve of claim 8 , wherein the first thickness is greater than 0.015 inches and the second thickness is less than 0.015 inches.
10. The valve of claim 8 , wherein the first thickness of the seal transitions into the second thickness of the seal at an angle between 25 and 45 degrees.
11. The valve of claim 8 , wherein the second portion extends at least 0.01 inches radially outward beyond the first portion.
12. The valve of claim 11 , wherein the second portion is configured to form an interference fit with a valve well.
13. A method of manufacture, comprising:
integrally forming, as a monolithic, unitary structure, a valve stem including a proximal end, a distal end, one or more seals, one or more orifices, and a lumen in fluid communication with at least one orifice of the one or more orifices; and
coupling an interface member with the valve stem and surrounding a first seal of the one or more seals with the interface member when the interface member is coupled with the valve stem.
14. The method of claim 13 , comprising sealing at least one orifice of the one or more orifices with the interface member.
15. The method of claim 13 , comprising removing a forming core pin from the lumen via an orifice of the one or more orifices, wherein the orifice is comprised in the proximal end of the valve stem.
16. The method of claim 13 , comprising forming the valve stem with a closed distal end.
17. The method of claim 13 , comprising forming at least one seal in the one or more seals with a first portion having a first thickness and a second portion having a second thickness, wherein the second portion is radially outward of the first portion and the second thickness is thinner than the first thickness.
18. A valve for a medical device, comprising:
an interface member;
a valve stem to which the interface member is removably couplable, the valve stem including a proximal end, a distal end, two or more orifices, and a lumen in fluid communication with first and second orifices of the two or more orifices, wherein the first orifice is located proximate the distal end of the valve stem, and wherein the lumen is plugged at the proximal end of the valve stem by the interface member; and
two or more seals comprising a monolithic, unitary structure with the valve stem, wherein a first seal of the two or more seals is positioned between the proximal end of the valve stem and the second orifice, and a second seal of the two or more seals is positioned between the second orifice and the distal end of the valve stem,
wherein the interface member surrounds the first seal of the two or more seals when the interface member is coupled with the valve stem.
19. The valve of claim 18 , wherein the distal end of the valve stem is closed and the lumen terminates at or distally beyond the first orifice and before the closed distal end.