# US 2019/0167957 A1 · Cerebrospinal Fluid Flow Diverter

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- Number: US 2019/0167957 A1
- Document ID: US20190167957A1
- Status: Published application
- Kind: A1
- Application number: 16/266,087
- Filed: 2019-02-03
- Published: 2019-06-06
- Earliest claimed: 2015-06-10
- Inventors: Victor M. Haughton
- Web page: https://patentgrep.com/patent/US20190167957A1

## CPC

- A61M 27/006: {Cerebrospinal drainage; Accessories therefor, e.g. valves}
- A61M 25/10185: {Valves}
- A61M 39/06: Haemostasis valves, i.e. gaskets sealing around a needle, catheter or the like, closing on removal thereof
- A61M 25/0108: {using radio-opaque or ultrasound markers}
- A61M 25/10: Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00})
- A61M 25/10183: {Compressible bulbs}
- A61M 25/10184: {Means for controlling or monitoring inflation or deflation}
- A61M 2039/062: {used with a catheter}
- A61M 2210/0687: Skull, cranium
- A61M 2210/0693: Brain, cerebrum
- A61M 2230/005: Parameter used as control input for the apparatus
- A61M 2230/30: Blood pressure (A61M2230/04 takes precedence)
- 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

A device that can be placed within or near the cranial vault that fluctuates in size in response to changes in CSF pressure is disclosed. The device diminishes in size when CSF pressures rise and increases in size as CSF pressures diminish. The device has the effect of reducing the flow of CSF occurring in the foramen magnum and provides an alternative to craniovertebral decompression in Chiari I patients. The device may have applications in other neurologic illnesses associated with abnormal CSF flow, such as Idiopathic Syringomyelia, Normal Pressure Hydrocephalus, and CSF dural leaks.

## Claims

### Claim at position 1

1-20. (canceled)

### Claim 21

A device comprising:
a component having a variable component volume and capable of being installed either adjacent to or into a fluid space within a human cranial vault, the human cranial vault having an intracranial pressure;
wherein the component comprises a flexible material that changes the component volume based on fluctuations in the intracranial pressure;
wherein the component volume decreases when the intracranial pressure increases, thereby adding to the capacity of the human cranial vault and reducing additional increases of intracranial pressure; and
wherein the component volume increases when the intracranial pressure decreases, thereby decreasing the capacity of the human cranial vault and reducing additional decreases of intracranial pressure.

### Claim 22 (depends on 21)

The device as in claim 21, further comprising a measuring system for measuring changes in the intracranial pressure and for measuring changes in the component volume.

### Claim 23 (depends on 21)

The device as in claim 21, wherein the fluid space within the intracranial vault is an intracranial subarachnoid space.

### Claim 24 (depends on 21)

The device as in claim 21, wherein the fluid space within the intracranial vault is within the cerebral ventricles.

### Claim 25 (depends on 21)

The device as in claim 21, wherein the component is implanted into the osseous cranial vault.

### Claim 26 (depends on 21)

The device as in claim 21, wherein the component is a balloon.

### Claim 27 (depends on 21)

The device as in claim 21, wherein the component is a spring-loaded device.

### Claim 28 (depends on 21)

The device as in claim 21, wherein the component comprises an elastic membrane.