Apparatus and method for positive closure of an internal tissue membrane opening
View Patent ↗The invention provides a device having two components: a needle advancing apparatus slidable longitudinally along a catheter to advance needles into a tissue membrane, such as a blood vessel wall, around an opening in the membrane; and, a suture retrieval assembly insertable through the catheter beyond a distal side of the tissue membrane. The needle advancing apparatus advances suture through the tissue wall. The suture retrieval assembly grabs the suture on the distal side of the tissue membrane for extraction thereof through the opening in the tissue membrane. A method for suturing a membrane beneath the patient's skin is also disclosed.
1. An apparatus for suturing a tissue membrane, the apparatus comprising:
a tubular body having a proximal portion and a distal portion, the distal portion extendable through an opening in the tissue membrane caused by a catheterization procedure;
a needle advanceable in a distal direction along the tubular body and through the tissue membrane adjacent the opening in the tissue membrane the needle having an eyelet and a length of suture through the eyelet;
a hemostasis seal member on the proximal portion of the tubular body, the seal member being openable against outflow of fluid through the opening in the tissue membrane; and
a suture chamber defined in the proximal portion of the tubular body, the suture chamber holding a length of suture, wherein the needle is adapted to carry at least a portion of the length of suture from the suture chamber through the tissue membrane.
2. The apparatus of claim 1 further comprising a suture retrieval assembly at the distal portion of the tubular body and deployable to receive the suture after the tubular body is extended through the opening in the tissue membrane.
3. The apparatus of claim 1 wherein the suture is attached to the needle.
4. The apparatus of claim 1 wherein the eyelet carries a doubled-back length of suture.
5. The apparatus of claim 1 wherein the needle is a hollow needle that carries the suture through the center of the hollow needle.
6. An apparatus for suturing tissue, comprising:
a tubular body having a proximal portion and a distal portion, the distal portion extendable through an opening in the tissue;
a needle advanceable in a distal direction along the tubular body and through the tissue adjacent the opening in the tissue membrane, the needle having an eyelet and a length of suture through the eyelet; and
a hemostasis seal member associated with the proximal portion of the tubular body, the seal being openable against outflow of fluid through the opening in the tissue membrane.
7. The apparatus of claim 6 further comprising a needle magazine associated with the tubular body, the needle magazine configured to house a portion of the needle.
8. The apparatus of claim 7 further comprising a suture chamber defined in the proximal portion of the tubular body, the suture chamber holding a length of suture, wherein the needle is adapted to carry at lest a portion of the length of suture from the suture chamber through the tissue membrane.
9. The apparatus of claim 8 further comprising a suture retrieval assembly at the distal portion of the tubular body and deployable to receive the suture after the tubular body is extended through the opening in the tissue.