Method and system for withdrawing blood

Patent metadata

Field	Value
Publication number	US-2016367176-A1
Application number	US-201615217404-A
Country	US
Kind code	A1
Filing date	Jul 22, 2016
Priority date	Apr 10, 2004
Publication date	Dec 22, 2016
Grant date	—

Abstract

A system for withdrawing blood from a body part that avoids formation of a drop of blood on the skin surface of the body part after blood removal. The system includes a collecting unit to withdraw blood, a lancing member configured for insertion into the body part and having a capillary to collect blood, and a pressure piece configured to apply pressure to the body part and having an actuator operably connected thereto. The pressure piece is movable relative to a support configured to exert pressure on the body part, and the actuator is configured to reduce the compressive force of the pressure piece after removing an amount of blood, whereby forming a drop of blood on the skin surface of the body part can be avoided.

First claim

What is claimed is:

1 . A system for withdrawing blood from a body part, comprising:
a pressure piece configured to apply pressure to a body part and having an actuator operably connected thereto; a lancing member configured for insertion into the body part and including a capillary to collect blood; a support configured to contact the body part; a collecting unit to withdraw blood; and the pressure piece being movable relative to the support in order to exert pressure on the body part, wherein the actuator is configured to reduce the compressive force of the pressure piece after removing an amount of blood, whereby forming a drop of blood on the skin surface of the body part can be avoided.

2 . The system of claim 1 , wherein the lancing member is formed on the collecting unit.

3 . The system of claim 1 , wherein the pressure piece is configured to be moved towards the support against a restoring force of the actuator by pressing the body part against the pressure piece.

4 . The system of claim 1 , wherein the actuator comprises a pretensioning element that further comprises a spring resting under pretension against the pressure piece.

5 . The system of claim 4 , wherein the actuator comprises a movable support to relax the pretensioning element.

6 . The system of claim 1 , wherein the actuator comprises a curve-controlled positioning drive for the movement of the pressure piece.

7 . The system of claim 1 , wherein the support comprises a positioning surface to which to apply the body part, the positioning surface being provided with an opening for the passage of the pressure piece.

8 . The system of claim 1 , wherein the pressure piece is formed as a ring and the lancing member is configured to be lanced through an opening in the ring into the body part.

9 . The system of claim 1 , wherein the pressure piece is formed by at least one bar configured to press down on the body part linearly or by a strut configured to press down on the body part in a punctiform manner.

10 . The system of claim 1 , wherein the pressure piece is elastically deformable.

11 . The system of claim 1 , further comprising a signal generator that is activated when a preset position is reached or when the support or the pressure piece is touched or reaches a stop position in order to generate a release signal for the activation of the lancing member.

12 . The system of claim 1 , wherein the collecting unit is operatively connected with a detection unit configured to analyze the blood.

13 . The system of claim 1 , wherein the collecting unit comprises a capillary transport channel to transport the blood.

Assignees

• Roche Diabetes Care Inc

Inventors

• Korner Stephan
• Jaeggi Rainer
• Griss Patrick
• Sarofim Emad
• Calasso Irio Giuseppe

Classifications

• A61B5/15113

  Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button · CPC title

• A61B5/150954

  Means for the detection of operative contact with patient, e.g. by temperature sensitive sensor · CPC title

• A61B5/150816

  by tactile feedback, e.g. vibration · CPC title

• A61B5/150419

  comprising means for capillary action · CPC title

• A61B5/150358

  Strips for collecting blood, e.g. absorbent · CPC title