# US 10,946,178 B1 · Method for preventing contrast induced nephropathy

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- Number: US 10,946,178 B1
- Document ID: US10946178B1
- Status: Granted
- Kind: B1
- Application number: 16/913,083
- Filed: 2020-06-26
- Granted: 2021-03-16
- Earliest claimed: 2020-01-07
- Applicants: Thomas J. Wool
- Inventors: Thomas J. Wool
- Web page: https://patentgrep.com/patent/US10946178B1

## CPC

- A61B 6/481: {involving the use of contrast agents}
- A61M 25/104: {used for angioplasty}
- A61B 6/50: specially adapted for specific body parts; specially adapted for specific clinical applications
- A61B 90/37: {Surgical systems with images on a monitor during operation}
- A61M 1/3615: {Cleaning blood contaminated by local chemotherapy of a body part temporarily isolated from the blood circuit}
- A61M 1/3616: {Batch-type treatment}
- A61M 25/1011: {Multiple balloon catheters}
- A61B 2090/3762: {using computed tomography systems [CT]}
- A61M 2025/1013: {with concentrically mounted balloons, e.g. being independently inflatable}
- A61M 2025/1052: {for temporarily occluding a vessel for isolating a sector}
- A61M 2025/1095: {with perfusion means for enabling blood circulation while the balloon is in an inflated state or in a deflated state, e.g. permanent by-pass within catheter shaft}
- A61M 2210/1082: Kidney
- A61M 2210/125: Heart
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)}

## Abstract

The invention relates to a method to prevent contrast-induced nephropathy during an imaging procedure. The method includes the step of positioning balloon catheters in a patient's renal arteries and inflating the balloons of each catheter to block the flow of contrast media into the patient's kidneys.

## Claims

### Claim 1

A method for preventing contrast-induced nephropathy during an imaging procedure, comprising the steps of:
a) inserting a first catheter containing a first inflatable balloon at a first catheter distal end in a patient's right renal artery;
b) inserting a second catheter containing a second inflatable balloon at a second catheter distal end in the patient's left renal artery;
c) inflating each inflatable balloon to block the flow of blood from the patient's blood circulation to the patient's kidneys;
d) introducing contrast media into the patient's blood circulation;
e) performing the imaging procedure;
f) deflating each inflatable balloon; and
g) removing each catheter from the patient.

### Claim 2 (depends on 1)

A method according to claim 1 wherein each catheter includes a proximal end that is operably connected to a source of perfusate.

### Claim 3 (depends on 2)

A method according to claim 2 wherein each catheter further includes a central lumen that is in fluid communication with the patient's kidneys.

### Claim 4 (depends on 1)

A method as in claim 1 wherein the imaging procedure is performed during a cardiac catheterization or PTCA procedure.

### Claim 5

A method for preventing contrast-induced nephropathy during an imaging procedure, comprising the steps of:
a) inserting a catheter containing an inflatable balloon at a catheter distal end in a patient's renal artery;
b) inflating the inflatable balloon to block the flow of blood from the patient's blood circulation to the patient's kidney;
c) introducing contrast media into the patient's blood circulation;
d) performing the imaging procedure;
e) deflating the inflatable balloon; and
f) removing the catheter from the patient.

### Claim 6 (depends on 5)

A method according to claim 5 wherein the catheter includes a proximal end that is operably connected to a source of perfusate.

### Claim 7 (depends on 6)

A method according to claim 6 wherein the catheter further includes a central lumen that is in fluid communication with the patient's kidneys.

### Claim 8 (depends on 5)

A method according to claim 5 wherein the imaging procedure is performed during a cardiac catheterization or PTCA procedure.