Intracranial pressure regulating system

• US 4,621,647 A
• Filed: 05/23/1984
• Issued: 11/11/1986
• Est. Priority Date: 08/10/1982
• Status: Expired due to Fees

• Current Assignee: Medex Incorporated (Smiths Group International Holdings Ltd.)
• Original Assignee: Medex Incorporated (Smiths Group International Holdings Ltd.)
• Inventors: Loveland, Steven R.
• Primary Examiner(s): Howell, Kyle L.
• Assistant Examiner(s): Hanley, John C.
• Application Number:
  US06/613,314
• Time in Patent Office: 902 Days
• Field of Search: 128/748, 128/673, 128/674, 128/672, 128/675, 73/4 R, 73/700, 73/756
• US Class Current: 600/561
• CPC Class Codes: A61B 5/031 Intracranial pressure
• CPC Class Codes: A61M 27/006 Cerebrospinal drainage; Accessories therefor, e.g. valves

Abstract

Apparatus for monitoring and regulating intracranial pressure. Primary components are a manometer tube connected to a fluid collector, a transducer for dynamic electronic monitoring, and an automatic regulator. These components are interconnected by tubing and three main stopcocks which permit multiple procedures to be performed. A fourth stopcock, syringe and appropriate connections permit the system to be connected to a dedicated source of sterile liquid.

Claims

1. Apparatus for diagnosing, monitoring, and treating elevated fluid pressure within an anatomical structure comprising,

a manifold plate, means for mounting said plate on a support so that it can be vertically adjusted whereby its height can be raised and lowered to precisely position said plate at a level chosen by the physician directly relating to anatomical structure within the patient'"'"'s body,

primary and secondary stopcocks each having first, second, and third ports and mounted on said manifold plate,

the first port of said secondary stopcock being connected to the first port of said primary stopcock,

a calibrated manometer tube having one end connected to the second port of said secondary stopcock,

a fluid collector connected to the third port of said secondary stopcock and, when in operation, normally disposed below said secondary stopcock,

an automatic pressure regulator comprising an elongated tubing having first and second ends, said tubing having the first end connected to the second port of said primary stopcock, and the second end connected to said fluid collector,

means for adjustably mounting a portion of said elongated tubing intermediate its first and second ends onto said manometer tube to predetermine its vertical height along the length of said manometer tube,

a pressure tube having first and second ends, the first end of said pressure tube being connected to the third port of said primary stopcock,

an adapter means for connecting a catheter or sub-arachnoid screw or other neurosurgical appliance to the second end of said pressure tube,

whereby, in operation, said manifold plate can be mounted on a support and vertically adjusted to precisely position it at a selected position with respect to the patient'"'"'s body, and said manometer tube is vertically extending, said fluid from the patient passing into said pressure tube being maintained at a pressure no greater than that indicated by the position of the intermediate portion of said elongated tubing on sald manometer tube.

2. Apparatus as in claim 1 further comprising a stopcock in said pressure tube, said last named stopcock having a port having an injection site.

3. Apparatus as in claim 1 in which said manometer tube is calibrated in pressure units,

whereby the desired maximum intracranial pressure can be obtained by positioning said intermediate portion adjacent the desired pressure value on said manometer tube when said tube is in an operative vertical position.

4. Apparatus as in claim 3 further comprising a dripchamber mounted in said elongated tubing between said intermediate portion and said fluid collector.

5. Apparatus as in claim 1 further comprising, a drain in said fluid collector, a stopcock connected to said drain, and a port in said stopcock which defines a needle injection site.

6. Apparatus as in claim 1 in which said manometer tube is calibrated in millimeters of mercury and units of volume.

7. Apparatus as in claim 6 in which said manometer tube has a capacity of about 4 cc.

8. Apparatus as in claim 7 further comprising,

a dripchamber in said elongated tubing between said intermediate portion and said fluid collector.

9. Apparatus as in claim 8 further comprising, a filtered air vent mounted through a wall of said dripchamber.

10. Apparatus as in claim 9 in which said air vent filter is of hydrophobic material of 0.22 micron pore size.

11. Apparatus as in claim 1 further comprising,

a one-way valve between the primary stopcock second port and the first end of said elongated tubing.

12. Apparatus as in claim 1 further comprising, a stopcock disposed in said pressure tube between said primary stopcock and adapter means, and wherein said adapter is a rotatable adapter.

13. Apparatus as in claim 1 in which all connections to said stopcocks are solvent-welded to provide assurance that there will be no inadvertent disconnection.

14. Apparatus as in claim 1 wherein,

said fluid collector is rigid, transparent, and calibrated in units of volume.

15. Apparatus as in claim 14 further comprising,

a hydrophobic vent through a wall of said fluid collector.

16. Apparatus as in claim 14 furthr comprising,

a stopcock fluidly connected to said fluid collector, said stopcock having port defining a needle injection site and a port means for connecting and disconnecting a disposable bag for removal of the contents of the collector.

17. Apparatus as in claim 1 in which said pressure tube is transparent plastic pressure tubing which is color-coded so that it can be differentiated from other tubing associated with other invasion procedures applied to a particular patient.

18. Apparatus as in claim 1 further comprising,

a dynamic transducer fixedly mounted with respect to the manifold plate such that it is positioned colinear with a line through said primary and secondary stopcocks, said transducer being connected either between the first ports of said stopcocks or between said primary stopcock third port and said pressure tube.

19. Apparatus for diagnosing, monitoring, and treating elevated fluid pressure within an anatomical structure comprising,

a manifold plate, means for mounting said plate on a support so that it can be vertically adjusted whereby its height can be raised and lowered to precisely position said plate at a level chosen by the physician directly relating to anatomical structure within the patient'"'"'s body,

primary and secondary stopcocks each having first, second, and third ports and mounted on said manifold plate,

a dynamic pressure transducer having first and second ports fixedly mounted with respect to the manifold plate such that it is positioned colinearly with a line through said primary and secondary stopcocks,

the first port of said secondary stopcock being connected to the first of said transducer ports, the first port of said primary stopcock being connected to the second of said transducer ports,

a calibrated manometer tube having one end connected to the second port of said secondary stopcock,

a fluid collector connected to the third port of said secondary stopcock and, when in operation, normally disposed below said secondary stopcock,

an automatic pressure regulator comprising an elongated tubing having first and second ends, said tubing having the first end connected to the second port of said primary stopcock, and the second end connected to said fluid collector,

means for adjustably mounting a portion of said elongated tubing intermediate its first and second ends onto said manometer tube to predetermine its vertical height along the length of said manometer tube,

a pressure tube having first and second ends, the first end of said pressure tube being connected to the third port of said primary stopcock,

an adaptor means for connecting a catheter or sub-arachnoid screw or other neurosurgical appliance to the second end of said pressure tube,

whereby, in operation, said manifold plate can be mounted on a support and vertically adjusted to precisely position it at a selected position with respect to the patient'"'"'s body, and said manometer tube is vertically extending, said fluid from the patient passing into said pressure tube being maintained at a pressure no greater than the pressure indicated by the position of the intermediate portion of said elongated tubing on said manometer tube.

20. Apparatus as in claim 19 further comprising a stopcock in said pressure tube, said stopcock having a port having filter.

21. Apparatus as in claim 19 further comprising a dripchamber mounted in the elongated tubing of said pressure regulator between the means for adjustably mounting said tubing to said manometer tube and said fluid collector.

22. Apparatus as in claim 21 further comprising an air vent through a wall of said dripchamber.

23. Apparatus as in claim 22 in which said air vent includes a filter of hydrophobic material of 0.22 micron pore size.

24. Apparatus as in claim 19 further comprising,

a patient stopcock having first, second, and third ports of which:

two of said ports are connected in line to said pressure tube between said primary stopcock and said adapter means,

said third port provides a vent to atmosphere.

25. Apparatus for diagnosing, monitoring, and treating elevated fluid pressure within an anatomical structure comprising,

a manifold plate, means for mounting said plate on a support so that it can be vertically adjusted whereby its height can be raised and lowered to precisely position said plate at a level chosen by the physician directly relating to anatomical structure within the patient'"'"'s body,

primary and secondary stopcocks each having first, second, and third ports and mounted on said manifold plate,

a third stopcock having first, second and third ports,

a dynamic pressure transducer having first and second ports fixedly mounted with respect to the manifold plate such that it is positioned colinearly with a line through said primary and secondary stopcocks,

the first port of said secondary stopcock being connected to the first port of said third stopcock, the second port of said third stopcock being connected to the first of said transducer ports, the first port of said primary stopcock being connected to the second of said transducer ports,

the third port of said third stopcock constituting a fluid injection site,

a calibrated manometer tube having one end connected to the second port of said secondary stopcock,

a fluid collector connected to the third port of said secondary stopcock and, when in operation, normally disposed below said secondary stopcock,

an automatic pressure regulator comprising an elongated tubing having first and second ends, said tubing having the first end connected to the second port of said primary stopcock, and the second end connected to said fluid collector,

means for adjustably mounting a portion of said elongated tubing intermediate its first and second ends onto said manometer tube to predetermine its vertical height along the length of said manometer tube,

a pressure tube having first and second ends, the first end of said pressure tube being connected to the third port of said primary stopcock,

an adapter means for connecting a catheter or sub-arachnoid screw or other neurosurgical appliance to the second end of said pressure tube,

whereby, in operation, said manifold plate can be mounted on a support and vertically adjusted to precisely position it at a selected position with respect to the patient'"'"'s body, and said manometer tube is vertically extending, said fluid from the patient passing into said pressure tube being maintained at a pressure no greater than the pressure indicated by the position of the intermediate portion of said elongated tubing on said manometer tube.

26. Apparatus as in claim 25 further comprising,

a T connection having first, second, and third ports,

said first port being connected to the third port of said third stopcock,

a syringe connected to said second port,

and a sterile fluid source being connected to said third port.

27. Apparatus as in claim 26 further comprising a first one-way valve between said third port of said T connection and said sterile fluid source, said valve having means for permitting flow of fluid only into said T connection.

28. Apparatus as in claim 27 further comprising a second one-way valve between said third port of said third stopcock and said T connection, said second one-way valve permitting fluid flow only toward said third port of said third stopcock.