Apparatus for suctioning and pumping body fluid from an incision

• US 6,485,439 B1
• Filed: 05/08/2000
• Issued: 11/26/2002
• Est. Priority Date: 04/28/1998
• Status: Expired due to Fees

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diagnostics Corporation (Roche Holding AG)
• Inventors: Roe, Jeffrey N., Douglas, Joel S.
• Primary Examiner(s): Shaver, Kevin
• Assistant Examiner(s): WINGOOD, PAMELA LYNN
• Application Number:
  US09/567,054
• Time in Patent Office: 932 Days
• Field of Search: 600/570, 600/583, 600/575, 600/578, 604/110, 604/195, 604/182, 604/192, 604/197
• US Class Current: 600/578
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150068 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150099 by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
• CPC Class Codes: A61B 5/150229 Pumps for assisting the blood sampling
• CPC Class Codes: A61B 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• CPC Class Codes: A61B 5/15109 Fully automatically triggered, i.e. the triggering does not require a deliberate action by the user, e.g. by contact with the patient's skin
• CPC Class Codes: A61B 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/15186 Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
• CPC Class Codes: 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

Abstract

A sampling device for sampling body fluid includes a casing which is pressed against a skin surface to produce a seal therewith. A cocking mechanism is pulled rearwardly to place a lancing device in a cocked state. By releasing a trigger, the lancing device is driven forward to produce an incision in the skin, and then is retracted out of the incision. A plunger mounted on the cocking mechanism is then retracted to generate a negative pressure at the front end of the casing to draw body fluid from the incision.

Claims

1. A sampling device for sampling body fluid, comprising:

a casing defining a longitudinal axis;

a skin-lancing mechanism for extending a lance through a longitudinal front end of the casing and against a skin surface to form an incision therein, and then retracting the lance back into the housing;

a trigger for releasably holding the skin-lancing mechanism in a cocked state;

an actuator for displacing the trigger to a release position for releasing the skin-lancing mechanism; and

a plunger separated from the actuator and being longitudinally rearwardly movable relative to both the skin-lancing mechanism and the actuator the plunger being constructed and arranged with the sampling device such that a negative pressure is generated at the front end of the casing by movement of the plunger away from the front end of the casing, the negative pressure acting to draw body fluid from the incision.

2. The sampling device according to claim 1 wherein the plunger is spring biased in a direction away from the front end of the casing.

3. A sampling device for sampling body fluid, comprising:

a casing defining a longitudinal axis;

a skin-lancing mechanism for extending a lance through a longitudinal front end of the casing and against a skin surface to form an incision therein, and then retracting the lance back into the housing;

a trigger for releasably holding the skin-lancing mechanism in a cocked state;

an actuator for displacing the trigger to a release position for releasing the skin-lancing mechanism; and

a plunger spring-biased in a direction away from the front end of the casing and arranged separated from the actuator and being longitudinally rearwardly movable relative to both the skin-lancing mechanism and the actuator for generating a negative pressure at the front end of the casing to draw body fluid from the incision.