Devices, systems, and methods for suturing tissue
The invention relates to devices, systems, and methods for percutaneously suturing biological material, such as a patient's tissues. In one embodiment, a suturing device includes first and second tissue engaging members connected to one another by a first interconnecting member. In another embodiment, systems and methods are provided for forming holes through two overlapping layers of tissue. Subsequent to forming holes through the two layers of tissue, the suturing device is positioned through the holes to join or bring into contact the two layers of overlapping tissue.
1. A method for suturing partially overlapping tissue flaps in a mammalian heart, comprising:
loading a suturing device into an elongate member to form a suturing system, said elongate member comprising a cutting member and said suturing device comprising
a first tissue engaging member
a second tissue engaging member, and
a first interconnecting member comprising a first fixed end connected to the first tissue engaging member, and a second fixed end connected to the second tissue engaging member thereby connecting the first tissue engaging member to the second tissue engaging member;
inserting the suturing system into a right atrium of the heart
puncturing a first through-hole in a first tissue flap at a non-overlapping portion of the flaps with the cutting member of the elongate member;
introducing the first tissue engaging member of the suturing device through the first through-hole and into the left atrium while connected to the second tissue engagement member;
positioning the first tissue engaging member on a surface of the tissue flap substantially approximal to the first through-hole;
retracting the elongate member proximally from the left atrium into the right atrium in the heart;
puncturing a second through-hole in a second tissue-flap with the cutting member of the elongate member before retracting the elongate member from the heart;
introducing the second tissue engaging member of the suturing device while connected to the first tissue engaging member through the second through-hole and into the left atrium; and
positioning the second tissue engaging member on a surface of the tissue flap substantially approximal to the second through-hole; and
retracting the elongate member from the heart.
2. The method for suturing tissue of claim 1 , the suturing system further comprising a tissue stabilization device and the method further comprising positioning the tissue stabilization device in a patent foramen ovale.
3. The method of claim 1 , wherein the second through-hole is positioned at a non-overlapping portion of the flaps.
4. The method of claim 1 , wherein the first interconnecting member of the suturing device is substantially located in the right atrium of the heart.
5. The method of claim 1 , wherein the tissue flaps comprise a septum primum and a septum secundum of an intraatrial septum of the heart.
6. A method for suturing partially overlapping tissue flaps in a mammalian heart, comprising:
loading a suturing device into an elongate member to form a suturing system, said suturing device comprising:
a first tissue engaging member;
a second tissue engaging member; and
a first interconnecting member connecting the first tissue
engaging member to the second tissue engaging member;
inserting the suturing system into a right atrium of the heart;
securing the first tissue engaging member to a first tissue flap at a non-overlapping portion of the flaps;
withdrawing the elongate member proximally into the right atrium;
securing the second tissue engaging member to a second tissue flap at a second non-overlapping portion of the flaps; and
retracting the elongate member from the heart.
7. The method for suturing tissue of claim 6 , wherein the suturing device further comprises a first anchor connected to the first tissue engaging member and a second anchor connected to the second tissue engaging member.
8. The method of claim 7 , wherein at least one of the first anchor and the second anchor is a spiral tissue anchor.
9. The method for suturing tissue of claim 8 , wherein at least one of the steps of securing the first tissue engaging member or the second tissue engaging member further comprises rotating the spiral tissue anchor into the tissue surface.
10. The method of claim 7 , wherein at least one of the first anchor and the second anchor is a barbed tissue anchor.
11. The method for suturing tissue of claim 10 , wherein at least one of the steps of securing the first tissue engaging member or the second tissue engaging member further comprises pushing the barbed tissue anchor into the tissue surface.
12. The method of claim 6 , wherein the suturing device further comprises a tightening mechanism for removing a slack in the first interconnecting member between the first tissue engaging member and the second tissue engaging member.
13. The method of claim 12 , further comprising the step of tightening the first interconnecting member to close an opening between the tissue flaps.
14. The method of claim 6 , wherein the suturing system further comprises a tissue stabilization device and the method further comprises positioning the tissue stabilization device in a patent foramen ovale.
15. The method of claim 6 , wherein the tissue flaps comprise a septum primum and a septum secundum of an intraatrial septum in the heart.