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Apparatus for obtaining and analyzing a blood sample with a lancet coupling mechanism

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Apparatus for obtaining and analyzing a blood sample with a lancet coupling mechanism


An apparatus for obtaining and analyzing a blood sample is presented. The apparatus comprises an integrated drive unit having a common drive source and a drive force transmission gearing that couples a lancet drive, a device for advancing a magazine, and a sample transfer device to the drive source. A tensioning rotor and a drive rotor are mounted so that they are rotatable coaxially to one another. A first cam control converts the rotation of the drive rotor into a radial forward and reverse movement of a drive rod. A second cam control converts the rotational movement of the tensioning rotor into a linear movement of a link slide. A switching link moved by the link slide rotates the magazine an additional step. A third cam control converts the rotational movement of the tensioning rotor into a linear movement of a pressure tappet perpendicular to the piercing axis.
Related Terms: Lancet

Inventors: Hans List, Kai Fluegge
USPTO Applicaton #: #20120271126 - Class: 600309 (USPTO) - 10/25/12 - Class 600 
Surgery > Diagnostic Testing >Measuring Or Detecting Nonradioactive Constituent Of Body Liquid By Means Placed Against Or In Body Throughout Test

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The Patent Description & Claims data below is from USPTO Patent Application 20120271126, Apparatus for obtaining and analyzing a blood sample with a lancet coupling mechanism.

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CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of PCT/EP2010/005416, filed Sep. 3, 2010, which is based on and claims priority to EP 09012895.0, filed Oct. 13, 2009, which is hereby incorporated by reference.

BACKGROUND

The present disclosure generally relates to an apparatus for obtaining and analyzing a blood sample and, in particular, to an apparatus for obtaining and analyzing a blood sample having a lancet coupling mechanism.

Patients with metabolic diseases typically must regularly analyze their blood. Especially diabetics are instructed to regularly check the blood sugar level. For this purpose, a small wound is generated by means of a lancet, preferably on a fingertip. A small sample is then collected from the exiting blood and transferred to a test element in order to be analyzed.

In more recent times, small, automatically operating, handheld devices have been developed, which contain a magazine having a plurality of lancets implemented as disposable articles and a corresponding number of test elements. The analysis of the blood sample is performed by an integrated measuring device. Such highly integrated devices have an advantage that the patient only needs to carry a single apparatus that can perform a number of tests identically before the consumable material needs to be replaced.

The design requirements for a small hand-held apparatus that anyone can perform an automatic blood sugar test can be extraordinarily demanding since the device needs to be as small and light as possible. It should be able to be operated so easily and comfortably that a blood sugar test can be performed anywhere and as inconspicuously as possible. Of course, absolute reliability should be expected from a medical apparatus. Since diabetes is widespread disease, the manufacturing costs should remain low for a mass-produced product.

For a fully automatically operating blood sugar test device, a special drive mechanism may be required to execute various and highly differing movements. These movements may include the rapid piercing movement of the lancet and the subsequent retraction movement, the advancing of the magazine to bring an unused lancet into functional position, the coupling of a fresh lancet and the decoupling of the used lancet, and kinematics that transfer of the blood sample from the lancet to the test element.

Therefore, there is a need for an apparatus for obtaining and analyzing a blood sample that is compact and light with very high mechanical reliability and the least possible energy demand.

SUMMARY

According to the present disclosure, an apparatus for obtaining and analyzing a blood sample is disclosed. The apparatus can comprise a housing, a contact device provided on the housing for pressing against a body part from which the blood sample is to be taken, and a magazine movably mounted on the housing. The magazine can comprise a plurality of lancets. Each lancet can pierce the body part and retract from the body part to receive the blood sample exiting the pierced body part. The apparatus further comprises a device for advancing the magazine to bring a lancet into a functional position and a lancet drive having a drive rod coupled to the lancet located in the functional position. The lancet drive can execute a controlled piercing movement along a piercing axis. Test elements can be assigned to the lancets. Each test element can receive the blood sample in order to analyze the blood sample. The apparatus also can comprise an integrated drive unit comprising the lancet drive, the device for advancing the magazine, and a device for generating a sample transfer movement perpendicular to the piercing axis.

In accordance with one embodiment of the present disclosure, the apparatus can comprise a lancet coupling mechanism. The lancing coupling mechanism can comprise at least one chamber that extends in the direction of the piercing axis and comprises a lancet, a drive rod that penetrates into the chamber and is coupled to the lancet to execute a controlled forward and reverse movement along the piercing axis. The lancet can be elastically bendable around at least one bending axis extending transversely to the piercing axis. The chamber can comprise a shaft adapted to the cross section of the lancet. The shaft can have at least one curvature around an axis transverse to the piercing axis. The drive rod can be coupled to the lancet when the lancet is in the bent state. The drive rod can have a formfitting connection to the lancet when the lancet is in a relaxed state.

Accordingly, it is a feature of the embodiments of the present disclosure to an apparatus for obtaining and analyzing a blood sample that is compact and light with very high mechanical reliability and the least possible energy demand. Other features of the embodiments of the present disclosure will be apparent in light of the description of the disclosure embodied herein.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The following detailed description of specific embodiments of the present disclosure can be best understood when read in conjunction with the following drawings, where like structure is indicated with like reference numerals and in which:

FIG. 1 illustrates an apparatus for obtaining and analyzing a blood sample in a simplified perspective view according to an embodiment of the present disclosure.

FIG. 2 illustrates the drive unit of the apparatus of FIG. 1 in perspective with an enlarged scale according to an embodiment of the present disclosure.

FIG. 3a illustrates a view from below of the tensioning rotor of the drive unit of FIG. 2 according to an embodiment of the present disclosure.

FIG. 3b illustrates a view from above of the tensioning rotor of the drive unit of FIG. 2 according to an embodiment of the present disclosure.

FIG. 4 illustrates the tensioning rotor from above according to an embodiment of the present disclosure.

FIG. 5a illustrates the drive rotor of the drive unit of FIG. 2 from above according to an embodiment of the present disclosure.

FIG. 5b illustrates the drive rotor of the drive unit of FIG. 2 from below according to an embodiment of the present disclosure.

FIG. 6 illustrates a part of the apparatus of FIG. 1 having an inserted magazine in an enlarged perspective view with vertical section in the radial direction through the rotational axis according to an embodiment of the present disclosure.



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Previous Patent Application:
Medical sensor kit for combination with a chair to enable measurement of diagnostic information
Next Patent Application:
Devices and methods for delivery and/or withdrawal of fluids and preservation of withdrawn fluids
Industry Class:
Surgery
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stats Patent Info
Application #
US 20120271126 A1
Publish Date
10/25/2012
Document #
13445584
File Date
04/12/2012
USPTO Class
600309
Other USPTO Classes
International Class
/
Drawings
12


Lancet


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