 Device and a method for treatment of atrioventricular regurgitation |
| The object of the invention is to provide a device and a method for treatment of atrioventricular ... |
|
| Annular prosthesis for mitral valve |
| What is claimed is: 1. An annular prosthesis for a mitral valve comprising a posterior half-ring ... |
|
| Device for treatment of atrioventricular valve regurgitation |
| A catheter device suitable for shrinking chordae tendineae of the human heart is provided with an ... |
|
| Minimally-invasive heart valves and methods of use |
| The present invention provides an expandable prosthetic heart valve for placement in a host heart ... |
|
| System and method to effect mitral valve annulus of a heart |
| The invention provides an assembly for effecting the condition of a mitral valve annulus of a heart.... |
|
| Soft tissue retractor and method for providing surgical access |
| In a first aspect, the present invention provides a retractor for providing surgical access to a ... |
|
| Mitral valve annuloplasty ring having a posterior bow |
| The present invention provides an annuloplasty ring for implantation in a mitral valve annulus that ... |
|
| Anchor and pull mitral valve device and method |
| The present invention provides a device for effecting mitral valve annulus geometry of a heart. The ... |
|
| Minimally invasive annuloplasty procedure and apparatus |
| Methods and apparatus embodying this invention with which the above and other objects can be ... |
|
|
Reciprocating pump and linear motor arrangement
| Details |
Inventors: Larson, Jr., Carl O.; Smith, James S.; Chapman, John H.; Slimon, Scot A.; Trahan, John D.; Brozek, Robert J.; Franco, Alberto; McGarvey, John J.; Rosen, Marvin E.; Pasque, Michael K.;
Assignee: Electric Boat Corporation (Groton, CT)
Primary Examiner: Kamm; William E.
Assistant Examiner:
Attorney, Agent or Firm: Brumbaugh, Graves, Donohue & Raymond
In one embodiment described in the specification, a surgically implantable reciprocating pump employs a check valve as the piston, which is driven by a permanent magnet linear electric motor to assist either side of the natural heart. The pump is implanted in the aorta or pulmonary artery using vascular attachment cuffs such as flexible cuffs for suturing at each end with the pump output directly in line with the artery. The pump is powered by surgically implanted rechargeable batteries. In another embodiment, pairs of pumps are provided to replace or assist the natural heart or to provide temporary blood flow throughout the body, for example, during operations to correct problems with the natural heart. |
|
DETAILED DESCRIPTION In accordance with one aspect of the invention, a surgically implantable reciprocating pump for pumping fluids includes a hollow cylinder, an array of axially spaced coil windings supported by the cylinder, a piston-valve assembly slidably positioned in the cylinder for reciprocal longitudinal movement in response to a sequential energization of coil windings in the array, the piston-valve assembly having at least two valve leaflets which pivot inside a diametral support ring, and a permanent magnetic component fixedly attached to the piston-valve for movement therewith.
A piston-valve having at least two valve leaflets provides significantly less shear compared to a single leaflet or tilting disk valve.
In accordance with another aspect of the invention, a surgically implantable reciprocating heart pump is driven by a compact high efficiency linear motor and controller which is capable of pumping fluids, including blood, with minimal damage to the fluid or formation of clots.
The precise piston position and motion control provided by the linear motor facilitates coordination of the pump with the action of the native heart.
In accordance with still another aspect of the invention, the pump is used as a permanently implanted Ventricular Assist Device (VAD) for the left and/or right heart ventricle, a permanently implanted Totally Artificial Heart (TAH), a temporarily implanted VAD or TAH for use as a bridge to cardiac transplant, a temporary circulatory assist during recovery of the patient's native heart, a cardiopulmonary bypass device during open heart surgery, or as part of a circuit which circulates blood such as an Extra Corporeal Membrane Oxygenation (ECMO) circuit.
The invention also provides a method for pumping fluids comprising the steps of providing a surgically implantable reciprocating pump including a hollow cylinder having an inlet end and an outlet end, an array of coil windings supported in axially spaced relation by the hollow cylinder, a piston-valve assembly slidably positioned in the cylinder for longitudinal movement in response to sequential energization of the coil windings, the piston-valve assembly having at least two valve leaflets which pivot inside a diametral support ring to cycle open and closed in response to relative motion with respect to a fluid, and a permanent magnetic arrangement having axially spaced magnet poles fixedly attached to the piston-valve for movement therewith
|
|
Heart Surgery 
