Catheter System for Left Heart Access
A pair of cooperating catheters are used together to provide rapid access to the Left heart for diagnostic or therapeutic interventions. The initial entry point for the catheter pair is the groin. The pair of catheters can be used to carry out an electrographic determination of the location of the Fossa Ovalis on the septum. Features on the Catheter system permit quick and reliable confirmation of the catheter location via echo or x-rays. Once across the septum the inner catheter is removed from the outer catheter and a standard intervention may be carried out through the lumen of the outer catheter.
1 . A catheter system for crossing into the Left heart from the Right heart comprising:
a. A first inner catheter, having a first working lumen, and having a first proximal end and having a first distal end;
b. A second outer catheter having a second working lumen sized to accept said inner catheter, and having a second distal end and having a second proximal end;
c. A first catheter coupler on said first inner catheter;
d. A second catheter coupler on said second outer catheter, adapted for mating engagement with said first inner catheter coupler to allow the pair of catheters to be moved together as a single unit;
e. A first handle coupled to said first proximal end, having a thumb actuated lever to advance a piercing needle out of the first distal end of said first catheter into a deployed state;
f. A spring located within said first handle adapted to bias said piecing needle in a retracted state;
g. An electrical connector located in said first handle electrically connect to said piercing needle;
2 . The catheter system of claim 1 wherein:
a. Said second distal end is curved and the curve lies in a plane,
b. Said piercing needle has a series of cuts to allow it to conform to the shape of said curve.
3 . The system of claim 1 wherein:
a. Said couplers form a bayonet fitting the are mated or released by rotation though an angle.
4 . The system of claim 2 wherein said curve is fixed but flexible.
5 . The system of claim 2 wherein said curve is variable and swings through 18 degrees by a manipulator knob.
6 . A system for left atrium access comprising:
an outer catheter, the outer catheter having an outer catheter handle and an outer catheter distal section, the outer catheter distal section extending distally from the outer catheter handle;
an inner catheter, the inner catheter having an inner catheter handle and an inner catheter distal section, the inner catheter handle having a connector, the inner catheter distal section extending distally from the inner catheter handle,
the inner catheter distal section comprising a sheath, a wire and a distal tip, the distal tip comprising an electrode, the wire extending from the electrode to the connector,
the distal tip having a retracted state and an extended state, in the retracted state the distal tip being positioned within the sheath, in the extended state at least a portion of the distal tip protrudes distally from the sheath
the inner catheter handle constructed and arranged to engage a proximal end of the outer catheter handle, when engaged the inner catheter distal section extends distally through the outer catheter handle and the outer catheter distal section.