초록 ▼

Methods and devices for repairing a cardiac valve. A minimally invasive procedure includes creating an access in the apex region of the heart through which one or more instruments may be inserted. The device can implant artificial heart valve chordae tendineae into cardiac valve leaflet tissues to r

Methods and devices for repairing a cardiac valve. A minimally invasive procedure includes creating an access in the apex region of the heart through which one or more instruments may be inserted. The device can implant artificial heart valve chordae tendineae into cardiac valve leaflet tissues to restore proper leaflet function and prevent reperfusion. The device punctures the apex of the heart and travels through the ventricle. The tip of the device rests on the defective valve and punctures the valve leaflet. A suture or a suture/guide wire combination is inserted, securing the top of the leaflet to the apex of the heart. A resilient element or shock absorber mechanism adjacent to the outside of the apex of the heart minimizes the linear travel of the device in response to the beating of the heart or opening/closing of the valve.

대표청구항 ▼

1. An apparatus comprising: a tubular pusher having a distal end and an interior diameter;a needle having a distal portion, the needle slidably disposed within the pusher with the distal portion of the needle extending from the distal end of the pusher;a suture having a first section and a second se

1. An apparatus comprising: a tubular pusher having a distal end and an interior diameter;a needle having a distal portion, the needle slidably disposed within the pusher with the distal portion of the needle extending from the distal end of the pusher;a suture having a first section and a second section,the first section having a first portion disposed in the pusher and a second portion including a coil formed of multiple turns about an exterior of the needle, the coil having a proximal end and a distal end, and further having an external diameter larger than the internal diameter of the pusher, the second portion having a first end at the distal end of the coil,the second section having a second portion with a first end coupled to the first end of the second portion of the first section, extending proximally from the first end of the second portion of the first section through an interior of the coil to the proximal end of the coil, and including a loop forming segment extending distally from a first end of the loop forming segment at the proximal end of the coil along an outside of the coil to the distal end of the coil, and extending proximally through the interior of the coil to the proximal end of the coil at a second end of the loop forming segment, and having a first portion extending proximally from the second end of the loop forming segment into the pusher,wherein the suture is configured for the coil to be formed into a loop by (1) withdrawing the needle proximally through the coil and the pusher to separate the coil from the needle, and (2) withdrawing the first portion of the second section relative to the distal end of the pusher to draw the second end of the loop forming segment of the second portion of the second section proximally from the proximal end of the coil to deflect the distal end of the coil laterally with respect to the proximal end of the coil and to draw the proximal end of the coil and the distal end of the coil towards each other to form the loop. 2. The apparatus of claim 1, wherein: the needle has an interior lumen and the distal portion of the needle has a slot communicating with the lumen;the first portion of the first section of the suture and the first portion of the second section of the suture extend through the lumen of the needle;the slot extends through the coil; andthe second portion of the second section of the suture extends through the interior of the coil within the lumen and extends through the slot from the lumen to an exterior of the coil. 3. The apparatus of claim 1, wherein the distal end of the pusher has an external diameter and the suture is configured for the coil to be formed into the loop such that the loop has a dimension larger than the external diameter of the pusher. 4. The apparatus of claim 1, further comprising a device operably coupled to a proximal portion of the needle, the device configured to withdraw the needle proximally relative to the distal end of the pusher. 5. The apparatus of claim 1, wherein the coil is a first coil, the loop is a first loop, and the second portion of the second section includes a second coil formed of multiple turns about the exterior of the needle proximal to the first coil and having a proximal end and a distal end, the second portion of the second section extending proximally from the first end of the second portion through the interior of the second coil to the proximal end of the second coil, the first end of the loop forming segment of the second portion of the second section extending from the distal end of the second coil,the second portion of the first section having a loop forming segment extending from a first end of the loop forming segment of the second portion of the first section proximally from the proximal end of the first coil along the outside of the second coil to the proximal end of the second coil and extending distally through the interior of the second coil to the distal end of the second coil at a second end of the loop forming segment of the second portion of the first section, the first portion of the first section extending proximally from the second end of the loop forming segment of the second portion of the first section into the pusher,wherein the suture is configured for the second coil to be formed into a second loop by (1) withdrawing the needle proximally through the second coil and the pusher to separate the second coil from the needle, and (2) withdrawing the first portion of the first section relative to the distal end of the pusher to draw the second end of the loop forming segment of the second portion of the first section proximally from the distal end of the second coil to draw the proximal end of the second coil and the distal end of the second coil towards each other. 6. The apparatus of claim 5, wherein: the needle has an interior lumen and the distal portion of the needle has a slot communicating with the lumen;the first portion of the first section of the suture and the first portion of the second section of the suture extend through the lumen of the needle;the slot extends through the first coil and the second coil;the second portion of the second section of the suture extends through the interior of the first coil within the lumen and extends through the slot from the lumen to an exterior of the first coil; andthe second portion of the first section of the suture extends through the interior of the second coil within the lumen and extends through the slot from the lumen to an exterior of the second coil.