# US 5,891,053 A · Blood-collecting device

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- Number: US 5,891,053 A
- Document ID: US5891053A
- Status: Granted
- Kind: A
- Application number: 08/776,407
- Filed: 1997-01-27
- Granted: 1999-04-06
- Earliest claimed: 1995-05-25
- Assignees: Kabushiki Kaisya Advance
- Inventors: Tetsuya Sesekura
- Web page: https://patentgrep.com/patent/US5891053A

## CPC

- A61B 5/1411: {by percutaneous method, e.g. by lancet}
- A61B 5/150022: {for capillary blood or interstitial fluid}
- A61B 5/150068: {by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced}
- A61B 5/150099: {by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes}
- A61B 5/150114: {by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced}
- A61B 5/150412: {Pointed piercing elements, e.g. needles, lancets for piercing the skin (blade-like piercing elements A61B5/150442)}
- A61B 5/150519: {Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device}
- A61B 5/150977: {Arrays of piercing elements for simultaneous piercing}
- A61B 5/15113: {Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button}
- A61B 5/15125: {comprising a vacuum or compressed fluids}
- A61B 5/15194: {fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A blood-collecting device includes a suction device for suctioning and thereby swelling a portion of a patient's skin by decompression so that a movable paracentetic needle can be driven into the swollen skin to puncture the skin. Once the skin has been punctured, the paracentetic needle is withdrawn while suction is maintained on the swollen skin in order to draw a blood sample from the patient.

## Claims

### Claim 1

A blood-collecting device which comprises:
suction means for suctioning a blood collection site of a patient's skin to induce swelling of the skin by decompression,
a moveable paracentetic member,
means for moving the paracentetic member toward the swollen skin to impact and puncture the skin, and
removal means for moving the paracentetic member away from the skin, wherein the suction means further permits blood to be drawn from the punctured skin.

### Claim 2 (depends on 1)

A device according in claim 1, wherein said decompression is in a range of -45 kpa to -60 kPa gauge pressure.

### Claim 3 (depends on 1)

A device according to claim 1 wherein the paracentetic member comprises a plurality of paracentetic needles.

### Claim 4 (depends on 3)

A device according to claim 3, wherein the paracentetic member comprises from 2 to 6 paracentetic needles.

### Claim 5 (depends on 1)

A device according to claim 1 wherein the paracentetic member comprises a single paracentetic needle.

### Claim 6 (depends on 1)

A device according to claim 1, wherein the paracentetic member comprises a needle support having a flat tip surface and a needle protruding from tip surface.

### Claim 7 (depends on 6)

A device according to claim 6, wherein the paracentetic needle protrudes a length of not more than 1 mm from the flat tip surface.

### Claim 8 (depends on 1)

A device according to claim 1, wherein the paracentetic member comprises a needle support having an inverted V-shaped tip surface ad a needle protruding from the inverted V-shaped tip surface.

### Claim 9 (depends on 8)

A device according to claim 8, wherein the paracentetic needle protrudes a length of not more than 1 mm from the inverted V-shaped tip surface.