TRANSSEPTAL ACCESS DEVICE AND METHOD OF USE
Systems, devices, and methods are provided for transseptal access of septa within a patient. The device can be advanced to a septum, e.g., towards a fossa ovalis. Instead of applying positive pressure to “tent” the septum, a negative pressure is applied to a lumen within a sheath, e.g., within an elongated member slidable within the sheath, via a negative pressure source such as a syringe on the proximal end of the sheath. This results in the septum pulling inward. The sheath employs a stationary needle-like central core component contained within the lumen of the sheath that punctures the septum when the same is pulled passed it by the negative pressure. The stationary needle-like central core component may be hollow and may form a portion of the elongated member or may be coupled to a distal end thereof.
1 . A device for transseptal access, comprising:
an elongated member having a proximal end and a distal end, configured to be delivered to a septal location;
a piercing element attached to a distal tip of a tubular member that moves within the elongated member, the piercing element configured to pierce the septum of the heart, wherein the piercing element is configured to be advanced distally or proximally, wherein the piercing element incorporates radiofrequency energy to create a hole in the septum or to reduce an amount of force necessary to create a hole in the septum, and wherein the piercing element further incorporates a measurement device to measure a parameter associated with transseptal access, to provide real time feedback to an operator to define when transseptal access is achieved.
2 . The device of claim 1 , wherein the parameter is pressure.
3 . The device of claim 1 , wherein the piercing element is configured to be advanced distally or proximally by a mechanical slide located at a handle of the device, the mechanical slide attached at least in part to the tubular member.
4 . The device of claim 1 , wherein the piercing element is advanced distally or proximally by a knob located at a handle of the device, the knob coupled to the tubular member.
5 . The device of claim 1 , further comprising a governor coupled to the piercing element, to inhibit movement of the piercing element past a pre-specified point.
6 . The device of claim 1 , further comprising a guidewire.
7 . The device of claim 1 , further comprising an ultrasound element at a distal portion of the elongated member to visualize transseptal access locations prior to puncture.
8 . The device of claim 1 , further comprising a dilator.
9 . The device of claim 1 , further comprising a steerable sheath.
10 . The device of claim 1 , wherein the piercing element is an electrode.
11 . The device of claim 10 , wherein the electrode is an annular or ring electrode.
12 . The device of claim 11 , wherein the annular or ring electrode is operated in a unipolar or bipolar configuration.
13 . The device of claim 1 , wherein the elongated member has further defined a guidewire lumen therein, the guidewire lumen extending from the proximal end to the distal end.
14 . The device of claim 1 , wherein the distal end of the tubular member incorporates a fixed curve.
15 . The device of claim 1 , wherein the tubular member incorporates a variation in diameter.
16 . The device of claim 1 , wherein the distal tip of the tubular member has a bullet shape.
17 . The device of claim 1 , wherein the distal tip of the tubular member is divided into multiple sections by multiple slots.
18 . The device of claim 17 , wherein the distal tip of the tubular member is divided into four sections by four slots.
19 . The device of claim 1 , wherein the distal tip of the tubular member includes a radioopaque feature or section or marker.
20 . The device of claim 1 , further comprising an energy source to transmit RF energy.
21 . A method for transseptal access, comprising:
delivering a device to a transseptal location, the device including:
an elongated member having a proximal end and a distal end, configured to be delivered to a septal location;
a piercing element attached to a distal tip of a tubular member that moves within the elongated member, the piercing element configured to pierce the septum of the heart, wherein the piercing element is configured to be advanced distally or proximally, wherein the piercing element incorporates radiofrequency energy to create a hole in the septum or to reduce an amount of force necessary to create a hole in the septum, and wherein the piercing element further incorporates a measurement device to measure a parameter associated with transseptal access, to provide real time feedback to an operator to define when transseptal access is achieved;
wherein the piercing element includes an RF electrode, and
wherein the tubular member has a distal end that incorporates a fixed curve; and
activating an RF source to cause the electrode to burn a hole in the septum; and
monitoring real time feedback of the parameter to define when transseptal access is achieved.