Percutaneous nephrostomy plug delivery device
View Patent ↗A device for delivering a percutaneous nephrostomy plug is provided. The device comprises a tubular member configured for insertion into a biological body. The device further comprises a handle coupled to a proximal end of the tubular member. The handle comprises a pusher element, an actuation element, and a transmission. The pusher element is disposed within the tubular member, and is configured to deliver a plug through a distal end of the tubular member. The transmission is coupled to the tubular member and the actuation element, and the transmission is configured to cause a retraction of the tubular member relative to the pusher element in response to a depression of the actuation element. A first depression of the actuation element toward the tubular member urges a partial exposure of the plug. A second depression of the actuation element urges a further exposure of the plug.
1. A medical device, comprising:
a tubular member having a proximal end and a distal end, the tubular member configured for insertion into a biological body;
a handle coupled to the proximal end of the tubular member, the handle comprising:
a pusher element configured to slide within the tubular member to deliver a plug through the distal end of the tubular member;
an actuation element comprising:
a button; and
a spring coupled to the button;
a transmission coupled to the tubular member and the actuation element, the transmission comprising:
a first rack coupled to the button;
a second rack coupled to tubular member;
a first gear engaged with the first rack;
a second gear engaged with the second rack, the second gear selectively coupled to the first gear; and
a roller clutch coupled to the first gear;
wherein a first depression of the button urges a first rotation of the first and second gears in a first direction, causing a retraction of the tubular member relative to the pusher element;
wherein upon a release of the button the first gear rotates in a direction opposite the first direction but the second gear remains stationary; and
wherein a second depression of the button urges a second rotation of the first and second gears in the first direction, causing a further retraction of the tubular member relative to the pusher element.
2. The medical device of claim 1 , wherein the pusher element is a cylindrical rod.
3. The medical device of claim 1 , further comprising the plug disposed within the tubular member at the distal end of the tubular member.
4. The medical device of claim 3 , wherein the plug has a cylindrical shape.