System and method for pyeloplasty internal-external stent
AssigneeIndiana University Research and Technology Corporation
InventorBenjamin Whittam
Life of this patent
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Abstract
A system and method is provided for the deployment of a ureter between a kidney and a bladder. A stent includes a flexible internal drainage portion, a retention portion, and an external drainage portion. The external drainage portion includes a sharpened tip configured to be passed from through a renal pelvis and out the side of a patient's body from inside the ureter. The stent is arranged to be removable by pulling the external drainage portion and thereby removing the stent out the side of the body.
Claims19
A stent for deployment in a patient's ureter between a kidney and a bladder, the stent comprising:
- a flexible internal drainage portion;
- a retention portion coupled to the flexible internal drainage portion;
- and
- an external drainage portion coupled to the retention portion and including a sharpened tip configured to be passed through a renal pelvis and out a side of the patient's body from inside the ureter,
- wherein the stent is arranged to be removable by pulling the external drainage portion and thereby removing the stent out the side of the patient's body.
A pyeloplasty internal/external stent for deployment in a patient's body, the stent comprising:
- a retention portion arranged to maintain the position of the stent within the patient's body;
- an internal drainage portion coupled to the retention portion and including an internal collection port arranged to collect fluid, and a internal drainage port arranged to discharge the fluid collected by the internal collection port;
- and
- an external drainage portion coupled to the retention portion and including an external collection port arranged to collect fluid,
- wherein at least a portion of the external drainage portion is configured to extend outside the body through a side of the patient's body, and
- wherein the external drainage portion includes a tip arranged to push from an interior of the patient's body, through body tissue, and out a side of the patient's body.
A method of installing a pyeloplasty internal/external stent in a patient's body, the method comprising:
- cutting an anastomosis incision in the patient's ureter;
- placing the stent into the patient's kidney and the ureter through the anastomosis incision such that an internal drainage portion is arranged in a mid-ureter section without extending into the patient's bladder;
- pushing a point of the stent through the patient's renal pelvis/parenchyma from the inside thereby forming an internal aperture through which an external drainage portion passes;
- further pushing the point through the patient's body until it emerges, forming an external aperture through which an end portion of the external drainage portion extends;
- removing the point from the external drainage portion;
- installing a valve on the end portion of the external drainage portion;
- with the stent in position, engaging a retention portion of the stent such that the stent is maintained in a desired position;
- draining urine internally from the kidney through the internal drainage portion, and to the bladder;
- draining urine externally from the kidney through the external drainage portion for testing;
- disengaging the retention portion;
- and
- removing the stent through the internal aperture and the external aperture.
Dependencies are inferred from the claim text.