DE202004005636U1 - Instrument for a rapid analysis of blood sugar has a finger pressure point, with an inflow opening for a blood drop and ventilation openings, for the blood to be drawn in by an underpressure for contact with the circuits - Google Patents

Instrument for a rapid analysis of blood sugar has a finger pressure point, with an inflow opening for a blood drop and ventilation openings, for the blood to be drawn in by an underpressure for contact with the circuits Download PDF

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Publication number
DE202004005636U1
DE202004005636U1 DE202004005636U DE202004005636U DE202004005636U1 DE 202004005636 U1 DE202004005636 U1 DE 202004005636U1 DE 202004005636 U DE202004005636 U DE 202004005636U DE 202004005636 U DE202004005636 U DE 202004005636U DE 202004005636 U1 DE202004005636 U1 DE 202004005636U1
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blood
finger pressure
pressure point
circuits
underpressure
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HONG WU PREC CO
Hong Wu Precision Co Ltd Chu Pei
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HONG WU PREC CO
Hong Wu Precision Co Ltd Chu Pei
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502715—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150015—Source of blood
    • A61B5/150022—Source of blood for capillary blood or interstitial fluid
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150053—Details for enhanced collection of blood or interstitial fluid at the sample site, e.g. by applying compression, heat, vibration, ultrasound, suction or vacuum to tissue; for reduction of pain or discomfort; Skin piercing elements, e.g. blades, needles, lancets or canulas, with adjustable piercing speed
    • A61B5/150061—Means for enhancing collection
    • A61B5/150099—Means for enhancing collection by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
    • A61B5/150213—Venting means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150358—Strips for collecting blood, e.g. absorbent
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/150007—Details
    • A61B5/150374—Details of piercing elements or protective means for preventing accidental injuries by such piercing elements
    • A61B5/150381—Design of piercing elements
    • A61B5/150412—Pointed piercing elements, e.g. needles, lancets for piercing the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15101—Details
    • A61B5/15103—Piercing procedure
    • A61B5/15105—Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/15—Devices for taking samples of blood
    • A61B5/151—Devices specially adapted for taking samples of capillary blood, e.g. by lancets, needles or blades
    • A61B5/15142—Devices intended for single use, i.e. disposable
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2562/00—Details of sensors; Constructional details of sensor housings or probes; Accessories for sensors
    • A61B2562/02—Details of sensors specially adapted for in-vivo measurements
    • A61B2562/0295—Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1486—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using enzyme electrodes, e.g. with immobilised oxidase
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/06—Auxiliary integrated devices, integrated components
    • B01L2300/0627—Sensor or part of a sensor is integrated
    • B01L2300/0645—Electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2300/00—Additional constructional details
    • B01L2300/08—Geometry, shape and general structure
    • B01L2300/0809—Geometry, shape and general structure rectangular shaped
    • B01L2300/0825—Test strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0481—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure squeezing of channels or chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • B01L2400/049—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/06—Valves, specific forms thereof
    • B01L2400/0605—Valves, specific forms thereof check valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/502723—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by venting arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
    • B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
    • B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
    • B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
    • B01L3/50273—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the means or forces applied to move the fluids

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hematology (AREA)
  • Engineering & Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
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  • Pathology (AREA)
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  • Biomedical Technology (AREA)
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  • Chemical & Material Sciences (AREA)
  • Dermatology (AREA)
  • Clinical Laboratory Science (AREA)
  • Dispersion Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Pain & Pain Management (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)

Abstract

The self-absorbent rapid probe, for blood analysis, has upper (1) and lower plates (2) and two electrically conductive circuits (3). The upper plate has a hemispherical finger pressure point (11), with a blood inflow opening (12) at its peak, and a number of ventilation openings (13) to ensure that a blood drop flows through the opening to be absorbed as the finger pressure forces air out through the ventilation holes. Release of the finger pressure gives an underpressure within its original structure to draw the blood into the interior and in contact with the circuits.

Description

HINTERGRUND DER ERFINDUNGBACKGROUND OF THE INVENTION

(a) Bereich der Erfindung(a) Field of the Invention

Die vorliegende Erfindung betrifft eine selbstansaugende Expresssonde für Blutanalysezwecke, bestehend aus einer unteren und einer oberen Platte, sowie zwei Leiterbahnen, dadurch ausgezeichnet, daß sich am Ende der oberen Platte ein kugelsegmentförmiger Fingerdruckpunkt befindet, an dessen Pol ein Ansaugloch ist, von dem aus die Blutstropfen nach innen gehen. Außerdem sind um das Ansaugloch verteilt eine Anzahl von von innen nach außen spitz zulaufenden Entlüftungslöchern, die bei Druck auf den Fingerdruckpunkt die Luft nach außen entweichen lassen und sich danach wieder schließen, so daß der nach dem Loslassen entstehende Unterdruck den Blutstropfen nach innen saugt, wodurch sich die Funktion der selbstansaugenden Expresssonde für Blutanalysezwecke ergibt.The present invention relates to a self-priming express probe for blood analysis purposes from a lower and an upper plate, as well as two conductor tracks, characterized in that there is a spherical segment-shaped finger pressure point at the end of the upper plate, at the pole of which there is a suction hole, from which the drops of blood follow go inside. Moreover are distributed around the suction hole a number from the inside out tapered ventilation holes that when the finger pressure point is pressed, the air escapes to the outside and then close again so that the one that arises after releasing Vacuum sucks the drop of blood inwards, which causes the function the self-priming express probe for blood analysis purposes.

(b) Beschreibung des derzeitigen Standes der Technik(b) Description of the current one State of the art

Bei der ersten Generation von Blutzuckeranalysegeräten, die auf optischer Basis arbeiteten, mußte der austretende Blutstropfen zuerst in das Gerät eingebracht werden, bevor die Analyse beginnen konnte, wodurch die Gefahr der Kontamination. erhöht wurde. In der Zwischenzeit wurde der Übergang von optischen zu elektrischen Analyseverfahren vollzogen. Das eine Ende der Sonde wird mit dem Analysegerät verbunden, die zu analysierende Blutflüssigkeit gelangt auf den seitlichen Spalt am anderen Ende der Sonde und nach einigen Sekunden automatisch von dort auf die Elektroden innerhalb der Sonde, wonach die Blutzuckeranalyse durchgeführt werden kann. Danach wird die Sonde verworfen. Ein direkter Kontakt zwischen Blutflüssigkeit und Analysemaschine findet nicht statt. Dadurch wird die Gefahr der Kontamination minimiert und nur eine geringe Menge Blut benötigt. Weitere Vorteile sind Zuverlässigkeit, Schnelligkeit, kein Reinigungsaufwand und hohe Genauigkeit bei niederen Kosten. Durch Einsatz anderer Enzymreaktionen kann das Verfahren auch für andere Tests, wie z.B. Harnsäure, Cholesterin, etc. verwendet werden. Die besagten Sonden machen Gebrauch von dem Prinzip, daß der Blutstropfen von selbst auf die Elektroden im Inneren fließt. Wenn nun das Blut des Patienten zu dickflüssig ist oder stark zur Gerinnung neigt, kann dies dazu führen, daß das Blut nicht ordungsgemäß in die Sonde gelangt (siehe 6) und das Meßergebnis verfälscht wird. Wegen ihres Einflusses auf die Gesundheit der Benutzer wird weltweit größter Wert auf ständige Verbesserung von Qualität und Sterilität medizinischer Geräte gelegt.With the first generation of blood glucose analyzers that worked on an optical basis, the emerging drop of blood had to be introduced into the device before the analysis could begin, thereby increasing the risk of contamination. was increased. In the meantime, the transition from optical to electrical analysis methods has been completed. One end of the probe is connected to the analyzer, the blood fluid to be analyzed reaches the lateral gap at the other end of the probe and after a few seconds automatically from there to the electrodes inside the probe, after which the blood sugar analysis can be carried out. The probe is then discarded. There is no direct contact between the blood fluid and the analysis machine. This minimizes the risk of contamination and only requires a small amount of blood. Other advantages are reliability, speed, no cleaning effort and high accuracy at low costs. By using other enzyme reactions, the method can also be used for other tests, such as uric acid, cholesterol, etc. The said probes make use of the principle that the drop of blood automatically flows onto the electrodes inside. If the patient's blood is too thick or has a tendency to clot, this can result in the blood not getting into the probe properly (see 6 ) and the measurement result is falsified. Because of their impact on the health of users, the greatest importance is placed on continually improving the quality and sterility of medical devices worldwide.

ZUSAMMENFASSUNG DER ERFINDUNGSUMMARY OF THE INVENTION

Gegenstand der Erfindung ist eine selbstansaugende Expresssonde für Blutanalysezwecke, gekennzeichnet durch eine Platte, auf deren vorderem Ende sich ein hohler kugelabschnittsförmiger Fingerdruckpunkt befindet, der am Gipfelpunkt eine Bluteintrittsöffnung hat, so daß ein dort aufgebrachter Blutstropfen sicher und hygienisch aufgenommen wird.The invention relates to a self - priming express probe for Blood analysis purposes, characterized by a plate on the front end a hollow spherical segment Finger pressure point, which has a blood inlet opening at the summit point, so that a Drops of blood applied there safely and hygienically absorbed becomes.

Ein weiteres Merkmal der selbstansaugenden Expresssonde für Blutanalysezwecke ist eine Anzahl von von innen nach außen spitz zulaufenden Entlüftungslöchern, die am Kugelumfang verteilt sind und sich bei Druck auf den Fingerdruckpunkt öffnen und so die Luft entweichen lassen.Another characteristic of self-priming Express probe for Blood analysis purposes is a number pointed from the inside out tapered ventilation holes that are distributed around the circumference of the ball and open when pressed on the finger pressure point and so let the air escape.

Durch den beim Loslassen des Fingerdruckpunkts in dessen Innerem entstehenden Unterdruck wird der Blutstropfen nach innen gesaugt.By releasing the finger pressure point the drop of blood is created inside the vacuum sucked inside.

KURZE BESCHREIBUNG DER ZEICHNUNGENSHORT DESCRIPTION THE DRAWINGS

1 Die selbstansaugende Expresssonde für Blutanalysezwecke im zusammengebauten Zustand 1 The self-priming express probe for blood analysis purposes when assembled

2 Die Einzelteile der selbstansaugenden Expresssonde für Blutanalysezwecke 2 The individual parts of the self-priming express probe for blood analysis purposes

3 Der Benutzungsvorgang der selbstansaugenden Expresssonde für Blutanalysezwecke 3 The process of using the self-priming express probe for blood analysis purposes

4 Ausschnitt aus 3, die Entlüftungslöcher darstellend 4 excerpt from 3 , representing the vent holes

5 Der Ansaugvorgang der selbstansaugenden Expresssonde für Blutanalysezwecke 5 The suction process of the self-priming express probe for blood analysis purposes

6 Herkömmliche Sonde als Kontrastbeispiel 6 Conventional probe as a contrast example

DETAILLIERTE BESCHREIBUNG DER BEVORZUGTEN AUSFÜHRUNGDETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

1 bis 5 zeigen eine neue selbstansaugende Expresssonde für Blutanalysezwecke, bestehend aus einer oberen Platte (1), einer unteren Platte (2) und zwei elektrischen Leiterbahnen (3). Die obere Platte (1) ist ein dünnes Plättchen an dessen vorderem Ende sich ein hohler kugelabschnittsförmiger Fingerdruckpunkt (11) befindet, der am Gipfelpunkt eine Bluteintrittsöffnung (12) hat und um dessen Umfang an der Basis eine Anzahl von innen nach außen spitz zulaufender Entlüftungslöcher (13) verteilt ist. Die untere Platte (2) ist ebenfalls ein dünnes Plättchen. Auf seiner Oberfläche sind links und rechts von der Mitte je eine elektrisch leitende Bahn (3) aufgebracht. Beide Platten werden nach dem Zusammensetzen mit Ultraschall verschweißt und bilden den Hauptteil der vorliegenden Erfindung. 1 to 5 show a new self-priming express probe for blood analysis purposes, consisting of an upper plate ( 1 ), a lower plate ( 2 ) and two electrical conductor tracks ( 3 ). The top plate ( 1 ) is a thin plate at the front end of which there is a hollow spherical finger pressure point ( 11 ) that has a blood inlet at the top ( 12 ) and around its circumference at the base has a number of ventilation holes tapering from the inside to the outside ( 13 ) is distributed. The bottom plate ( 2 ) is also a thin plate. On its surface there are an electrically conductive track on the left and right of the center ( 3 ) applied. Both plates are ultrasonically welded after assembly and form the main part of the present invention.

3 bis 5 zeigen wie die selbstansaugende Expresssonde für Blutanalysezwecke den Blutstropfen von der Fingerkuppe in die Eintrittsöffnung (12) saugt. Bei Druck auf den Fingerdruckpunkt (11) verändert der Kugelabschnitt seine Form und die in dem darunterliegenden Hohlraum eingeschlossene Luft entweicht durch die Entlüftungslöcher (13) bis Druckgleichgewicht zwischen Innen und Außen herrscht und sich die Entlüftungslöcher (13) wieder schließen. Nach dem Loslassen nimmt der Fingerdruckpunkt (11) seine ursprüngliche Gestalt wieder an. Der dabei entstehende Unterdruck saugt den Blutstropfen nach innen. 3 to 5 show how the self-priming express probe for blood analysis uses the drop of blood from the fingertip into the inlet opening ( 12 ) sucks. When pressing the finger pressure point ( 11 ) the spherical section changes its shape and the air enclosed in the underlying cavity escapes through the ventilation holes ( 13 ) until there is pressure equilibrium between inside and outside and the ventilation holes ( 13 ) close again. After releasing the finger pressure point ( 11 ) returned to its original shape. The resulting negative pressure sucks the drop of blood inwards.

Die Funktion dieser Sonde hängt in keiner Weise davon ab, daß der Blutstropfen aus eigener Kraft auf die Leiterbahnen gelangt, da er durch den Unterdruck dorthin gesaugt wird. Außerdem führt sie zu einer schnelleren Analyse, größerer Genauigkeit und höherer Zuverlässigkeit.The function of this probe is in no way dependent assuming that the Drops of blood get onto the conductor tracks under their own power because it is sucked there by the vacuum. It also leads to a faster one Analysis, greater accuracy and higher Reliability.

Claims (1)

Eine selbstansaugende Expresssonde für Blutanalysezwecke bestehend aus einer oberen Platte, einer unteren Platte und zwei elektrisch leitenden Leiterbahnen, gekennzeichnet durch einen hohlen kugelabschnittsförmigen Fingerdruckpunkt, der aus dem vorderen Ende der oberen Platte hervorragt und an seinem Gipfel eine Bluteintrittsöffnung hat, sowie eine Anzahl Entlüftungslöcher am Umfang seiner Basis; so daß ein Blutstropfen durch die Bluteintrittsöffnung am Gipfel des Fingerdruckpunkts eingesaugt werden kann, nachdem nach Druck auf den Fingerdruckpunkt die Luft aus seinem Innern durch die Entlüftungslöcher ausgetreten ist, die Entlüftungslöcher sich nach Erreichen des Druckausgleichs zwischen Innen und Außen geschlossen haben und das Loslassen des Fingerdruckpunkts zum Entstehen eines Unterdrucks innerhalb des seine ursprüngliche Gestalt wieder annehmenden Fingerdruckpunkts führt.A self-priming express probe for blood analysis purposes consisting of an upper plate, a lower plate and two electrically conductive conductor tracks, characterized by a hollow finger pressure point in the form of a spherical segment, which protrudes from the front end of the top plate and at its Peak a blood inlet has, as well as a number of ventilation holes on Scope of its base; so that a Drops of blood through the blood inlet at the top of the finger pressure point can be sucked in after pressing on the finger pressure point the air has escaped from inside through the ventilation holes, the ventilation holes themselves closed after pressure equalization between inside and outside and releasing the finger pressure point to create a negative pressure within its its original Takes shape again.
DE202004005636U 2004-04-08 2004-04-08 Instrument for a rapid analysis of blood sugar has a finger pressure point, with an inflow opening for a blood drop and ventilation openings, for the blood to be drawn in by an underpressure for contact with the circuits Expired - Lifetime DE202004005636U1 (en)

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DE202004005636U DE202004005636U1 (en) 2004-04-08 2004-04-08 Instrument for a rapid analysis of blood sugar has a finger pressure point, with an inflow opening for a blood drop and ventilation openings, for the blood to be drawn in by an underpressure for contact with the circuits

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* Cited by examiner, † Cited by third party
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WO2014083496A1 (en) * 2012-11-29 2014-06-05 Koninklijke Philips N.V. Cartridge for uptake and processing of a sample

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014083496A1 (en) * 2012-11-29 2014-06-05 Koninklijke Philips N.V. Cartridge for uptake and processing of a sample
US10525465B2 (en) 2012-11-29 2020-01-07 Koninklijke Philips N.V. Cartridge for uptake and processing of a sample

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