A hemostasis mechanism includes a housing, and a pressure responsive seal positioned within the housing and having an outer seal surface exposed to a fluid pressure of a port formed in the housing. A pressurization device is in fluid communication with the port, and includes a detent having a releas
A hemostasis mechanism includes a housing, and a pressure responsive seal positioned within the housing and having an outer seal surface exposed to a fluid pressure of a port formed in the housing. A pressurization device is in fluid communication with the port, and includes a detent having a release state, and an engaged state holding a plunger of the pressurization device at an advanced position to maintain an increased fluid pressure supplied to the pressure responsive seal to maintain sealing engagement about a transluminal device. Related methodology is also disclosed.
대표청구항▼
1. A hemostasis mechanism for use in treating a patient comprising: a housing defining a through-bore having a longitudinal axis, and a first port in fluid communication with the through-bore;a pressure responsive seal extending circumferentially about the longitudinal axis within the through-bore,
1. A hemostasis mechanism for use in treating a patient comprising: a housing defining a through-bore having a longitudinal axis, and a first port in fluid communication with the through-bore;a pressure responsive seal extending circumferentially about the longitudinal axis within the through-bore, and having an outer seal surface exposed to a fluid pressure of the first port, and an inner seal surface;a pressurization device in fluid communication with the first port, and including a plunger movable from a first position toward an advanced position, to increase the fluid pressure such that the pressure responsive seal deforms into sealing engagement with a transluminal device positioned within the through-bore;the pressurization device further including a detent operably coupled with the plunger and having a release state, and an engaged state holding the plunger at the advanced position to maintain the increased fluid pressure; andthe housing further includes a core piece having the first port formed therein and positioned about the cylindrical wall between the first and second end flanges, and an outer piece containing the pressure responsive seal and the core piece and having a second port formed therein fluidly connecting the first port with the pressurization device. 2. The mechanism of claim 1 wherein the plunger defines a transverse axis, and the detent further includes a non-rotatable stop, and a rotatable catch coupled with the plunger and movable between a first angular orientation about the transverse axis at which the catch contacts the stop and retracting of the plunger from the advanced position is prevented, and a second orientation at which retracting of the plunger is permitted. 3. The mechanism of claim 1 wherein the housing includes an inner housing surface defining the through-bore, and a clearance in fluid communication with the port extends between the inner housing surface and the outer seal surface and surrounds the pressure responsive seal. 4. The mechanism of claim 3 wherein the pressure responsive seal includes a cylindrical wall including the inner and outer seal surfaces, and having a longitudinal passage formed therein and being coaxial with the through-bore, for receipt of the transluminal device. 5. The mechanism of claim 4 wherein the pressure responsive seal further includes a first end flange and a second end flange, each projecting radially outward from the cylindrical wall. 6. The mechanism of claim 4 wherein the pressure responsive seal further includes a plurality of sealing protrusions each projecting radially inward from the cylindrical wall and being movable inwardly via the deformation to establish the sealing engagement with the transluminal device. 7. The mechanism of claim 6 wherein the plurality of sealing protrusions includes a total of three crescent shaped protrusions forming a tricuspid sealing pattern about the transluminal device. 8. The mechanism of claim 3 further comprising a biasing spring biasing the plunger toward the first position. 9. The mechanism of claim 8 wherein the plunger defines a transverse axis, and the detent further includes a non-rotatable stop, and a rotatable catch coupled with the plunger and movable between a first angular orientation about the transverse axis at which the catch contacts the stop and retracting of the plunger from the advanced position is prevented, and a second orientation at which retracting of the plunger is permitted. 10. The mechanism of claim 1 wherein the housing further includes a cap attached to the outer piece and clamping the core piece and the pressure responsive seal within the outer piece, such that the first end flange is held in sealing engagement between the cap and the core piece, and the second end flange is held in sealing engagement between the outer piece and the core piece, to fluidly isolate the clearance from the through-bore. 11. A method of percutaneously treating a patient with a hemostasis mechanism that includes a housing defining a through-bore having a longitudinal axis, and a first port in fluid communication with the through-bore; a pressure responsive seal extending circumferentially about the longitudinal axis within the through-bore, and having an outer seal surface exposed to a fluid pressure of the first port, and an inner seal surface; a pressurization device in fluid communication with the first port, and including a plunger movable from a first position toward an advanced position, to increase the fluid pressure such that the pressure responsive seal deforms into sealing engagement with a transluminal device positioned within the through-bore; and the pressurization device further including a detent operably coupled with the plunger and having a release state, and an engaged state holding the plunger at the advanced position to maintain the increased fluid pressure, the housing further includes a core piece having the first port formed therein and positioned about the cylindrical wall between the first and second end flanges, and an outer piece containing the pressure responsive seal and the core piece and having a second port formed therein fluidly connecting the first port with the pressurization device, the method comprising the steps of: pushing the plunger toward the advanced position in the pressurization device in fluid communication with the pressure responsive seal of the hemostasis mechanism in sealing engagement with the transluminal device;adjusting the detent in the pressurization device from the engaged state inhibiting retracting of the plunger, to the release state, in response to the pushing of the plunger;retracting the plunger subsequent to adjusting the detent such that a fluid pressure supplied by the pressurization device to the pressure responsive seal is reduced; andsliding the transluminal device through the hemostasis mechanism to change its position within a body lumen of the patient while the fluid pressure is at the reduced pressure. 12. The method of claim 11 wherein the step of retracting includes retracting the plunger under the influence of a biasing spring. 13. The method of claim 12 further comprising a step of pulling open the pressure responsive seal via the reduced pressure. 14. The method of claim 12 further comprising the steps of reestablishing sealing engagement of the pressure responsive seal about the transluminal device at its changed position, and adjusting the detent back to its engaged state to maintain the reestablished sealing engagement, in response to pushing the plunger again. 15. The method of claim 14 further comprising a step of letting go of an actuator for the plunger subsequent to the adjustment of the detent back to its engaged state. 16. The method of claim 14 wherein the step of reestablishing includes deforming the pressure responsive seal to a tricuspid sealing pattern. 17. The method of claim 14 wherein the step of reestablishing includes displacing about 2 milliliters of air during the another advancement of the plunger.
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이 특허에 인용된 특허 (8)
Mollenauer Kenneth H. (Santa Clara CA) Hermann George D. (Los Gatos CA) Howell Thomas A. (Palo Alto CA) Monfort Michelle Y. (Los Gatos CA), Adjustable valve having a radially compressible sealing body.
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