# US 5,843,046 A · Catheter apparatus

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- Number: US 5,843,046 A
- Document ID: US5843046A
- Status: Granted
- Kind: A
- Application number: 08/864,935
- Filed: 1997-05-29
- Granted: 1998-12-01
- Earliest claimed: 1997-05-29
- Assignees: Paul J. Motisi
- Inventors: Paul J. Motisi; Dale Tokarz; Bruce Flesher
- Web page: https://patentgrep.com/patent/US5843046A

## CPC

- A61B 5/150992: {Blood sampling from a fluid line external to a patient, such as a catheter line, combined with an infusion line; Blood sampling from indwelling needle sets, e.g. sealable ports, luer couplings or valves}
- A61B 5/15003: {for venous or arterial blood}
- A61B 5/150221: {Valves}
- A61M 39/0606: {without means for adjusting the seal opening or pressure (A61M39/0693 takes precedence)}
- A61M 2039/0202: {for taking samples}
- A61M 2039/0633: {the seal being a passive seal made of a resilient material with or without an opening}
- A61M 2039/0646: {Duckbill-valve}
- 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

A catheter apparatus having a housing with a throughbore. A seal is mounted within the throughbore. The seal has a peripheral sealing surface that contacts an external surface of a sleeve when the sleeve is mounted within the throughbore. A one-way valve or check valve is mounted within the throughbore, preferably between the peripheral sealing surface and the sleeve. When the sleeve is withdrawn from the throughbore, the one-way valve prevents fluid, such as a blood sample, from flowing outside of the housing.

## Claims

### Claim 1

A catheter apparatus comprising:
a housing having a throughbore, a sheath, a portion of said sheath mounted within said throughbore;
a seal mounted within said throughbore, said seal having a peripheral sealing surface, a one-way valve mounted within said throughbore; and
a sleeve mounted within said throughbore, said sleeve extending through said peripheral sealing surface with an external surface of said sleeve contacting said peripheral sealing surface, said sleeve having a chamber and an open end portion in communication with said chamber, and a plunger closing said open end portion of said sleeve and slidably mounted within said chamber.

### Claim 2 (depends on 1)

A catheter according to claim 1 further comprising a cap, said cap retaining said seal in a mounted position with respect to said housing.

### Claim 3 (depends on 2)

A catheter according to claim 2 wherein said cap retains said seal in a mounted position within said throughbore.

### Claim 4 (depends on 2)

A catheter according to claim 2 wherein said cap is hermetically sealed about said throughbore and with respect to said housing.

### Claim 5 (depends on 2)

A catheter according to claim 2 wherein said cap has a passageway aligned with said throughbore, and said sleeve is positioned within said passageway.

### Claim 6 (depends on 1)

A catheter according to claim 1 wherein a portion of said throughbore has a circular cross section.

### Claim 7 (depends on 1)

A catheter according to claim 1 wherein said sheath is sealably mounted with respect to said housing forming a hermetic seal between said throughbore and an atmosphere external to said housing.

### Claim 8 (depends on 1)

A catheter according to claim 1 wherein said seal has an O-ring section forming said peripheral sealing surface.

### Claim 9 (depends on 1)

A catheter according to claim 1 wherein said one-way valve comprises a bulbous end portion having at least one slit positioned in a generally central portion of said bulbous end portion.

### Claim 10 (depends on 9)

A catheter according to claim 9 wherein said bulbous end portion is of a resilient deformable material.

### Claim 11 (depends on 9)

A catheter according to claim 9 wherein said bulbous end portion is integrated with said seal.

### Claim 12 (depends on 9)

A catheter according to claim 9 wherein said bulbous end portion has two said slits and said slits intersect each other.

### Claim 13 (depends on 9)

A catheter according to claim 9 wherein said bulbous end portion converges in a direction away from said peripheral sealing surface.

### Claim 14 (depends on 1)

A catheter according to claim 1 further comprising a retainer positioned within said throughbore and abutting said sheath, and said retainer having a guide surface for guiding a needle through said sheath.