EP0843534A1 - Dispositif de prelevement - Google Patents

Dispositif de prelevement

Info

Publication number
EP0843534A1
EP0843534A1 EP95940968A EP95940968A EP0843534A1 EP 0843534 A1 EP0843534 A1 EP 0843534A1 EP 95940968 A EP95940968 A EP 95940968A EP 95940968 A EP95940968 A EP 95940968A EP 0843534 A1 EP0843534 A1 EP 0843534A1
Authority
EP
European Patent Office
Prior art keywords
fluid
cell
sampling
fluid chamber
valve device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95940968A
Other languages
German (de)
English (en)
Inventor
Jan Lauridsen
Tom Nilsson
Gerner Hansen
Karin Sundberg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amnitec AS
Original Assignee
Amnitec AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Amnitec AS filed Critical Amnitec AS
Publication of EP0843534A1 publication Critical patent/EP0843534A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
    • A61B10/0045—Devices for taking samples of body liquids
    • A61B10/0048—Devices for taking samples of body liquids for taking amniotic fluid samples

Definitions

  • the present invention relates to a sampling device for taking out a sample of a cell-containing liquid fluid from a human or an animal body.
  • a sampling device of this type for taking out a sample of a cell-containing amniotic fluid from an amniotic cavity is known from EP 0471721.
  • the present invention provides a sampling device by means of which it is possible to take out not only a sample with an increased concentration of cells, but also a fluid sample in the same operation.
  • the sampling device may be used not only for taking out a sample of an amniotic fluid for the purpose described in the above EP 0471721, but also for taking out samples of other kinds of cell-containing liquid body fluids, such as blood, and the free end of the sampling tube may be defined by or connected to a hollow needle or cannula fcr penetrating the wall of a body cavity from which a sample should be taken out .
  • the sampling tube has been placed in communication with an amniotic cavity, a blood vessel, or another fluid containing cavity of an animal or human body, and the valve device has been positioned in of its said first and second positions, a suitable volume of body fluid is drawn into the fluid chamber via the sampling tube.
  • valve device may be positioned in the other of said first and second positions and in said third position.
  • a minor part of the fluid volume is expelled from the fluid chamber so as to at least partly fill the fluid sample receptacle.
  • a major part of the fluid volume is expelled from the fluid chamber when the valve device is in said other position. This major part, which has passed the cell-filtering means or cell-retaining means may be returned to the body cavity via the sampling tube .
  • the sampling device may be used for taking out a volume of a liquid sample, for filtering cells from such sample, for retaining a minor part of the sample, and for almost immediately returning the major part of the filtered fluid to the body cavity from which it was withdrawn.
  • the valve device may be of any suitable type, such as a manually operatable three-way valve or cock, and the fluid chamber may, for example, be defined by a syringe barrel and by a piston displaceably arranged therein.
  • the sample receptacle may have a vent, which may, for example, comprise a filter of the type allowing gaseous, bu net liquid fluid to pass.
  • valve device When the valve device is in its third position it may define a third fluid flow path including the filtering means, so that the sample collected in the fluid sample receptacle have been filtered.
  • the valve device is placed in its second position when the fluid volume is drawn into the fluid chamber and is by-passing the filtering means.
  • the valve device may then be placed in its third position and as a first expulsion step a minor part of the fluid volume may be transferred from the fluid chamber to the fluid sample receptacle via the filtering means.
  • the valve device may now be placed in its first position, whereafter the remaining major part of the fluid volume is expelled from the fluid chamber and returned to the body cavity via the first path which includes the filtering means.
  • the sample receptacle may be of any suitable type and may, for example, be in the form of a hose or a tube section which may be closed at opposite ends. When a sample has been collected in the receptacle its opposite ends may be closed for example by means of clamps, whereafter the sample containing receptacle may be removed from the sampling device .
  • valve device the cell-filtering means, and the fluid sample receptacle are arranged in a common housing, a free end portion of the sampling tube extending outwardly from said housing.
  • a syringe defining the fluid chamber may be rigidly mounted on the housing so as to obtain a unitary sampling device .
  • the present invention relates to a method for operating the sampling device described above, said method comprising positioning the valve device in one of said first and second positions, drawing a volume of body fluid into the fluid chamber from a human or an animal body via the sampling tube, positioning the valve device in its third position, expelling a first part of the fluid volume from the fluid chamber so as to at least partly fill the sample receptacle with liquid fluid, positioning the valve device in the other of said first and second positions, and expelling a second part of the fluid volume from the fluid chamber so as to return filtered fluid to said body.
  • Fig. 1 is a perspective view showing an embodiment of the sampling device according to the invention
  • Fig. 2 is a longitudinally sectional view of part of the valve device shown in Fig. 1 in an enlarged scale
  • Fig. 3 is a top plane view of part of the sampling device shown in Fig. 1, an upper housing part having been removed
  • Fig. 4 is a cross sectional view of the valve and the surrounding housing
  • Fig. 5 is a longitudinal sectional view of a cell filtering device
  • Figs. 6-8 diagrammatically illustrate the function of the sampling device.
  • the sampling device shown in the drawings comprises a syringe barrel or cylinder 10 having its one end mounted to a housing comprising an upper shell 11 and a lower shell 12.
  • a piston 13 is displaceably arranged within the cylinder 10.
  • a three- way valve or cock 14 comprising a valve housing 15 and a valve member or valve plug 16 rotatably mounted in the valve housing is arranged within the housing defined by the upper and lower shells 11 and 12.
  • the sampling device further comprises a cell retaining or filtering device 17 and a vent filter 18 positioned within the housing defined by the shells 11 and 12.
  • the valve housing 15 has a number of radially extending tube stubs defining liquid inlet and outlet passages.
  • the syringe chamber defined within the cylinder 10 communicates with a valve passage 18 as best shown in Figs. 2 and 6-8.
  • a valve passage 19 communicates with a flexible tube or hose 30 (Figs. 6-8 ⁇ extending outwardly from the housing 11, 12 though a tubular exit 20, and the free outer end of the tube or hose may be connected to a hollow needle or cannula 2S (Figs. 6-8) .
  • a valve passage 21 is connected to a filter outlet end 22 via a hose (not shown) and a valve passage 23 is connected to a filter inlet end 24 via a hose 25 (Figs. 1 and 6-8) .
  • a valve passage 26 is connected to a fluid sample receptacle 27, which is indicated in Figs. 6-8, but not shown in the other Figures. The fluid sample receptacle 27 is vented through the filter 28.
  • a sampling device When the valve member 16 is placed in the position indicated in Fig. 6 the hollow needle or cannula 29, which is connected to the free end of the hose 30 may penetrate the wall of a body cavity, such as an amniotic cavity. The piston 13 may then be withdrawn so as to suck a volume of liquid body fluid into the cylinder 10. Now, the valve member 16 is turned to the position indicated in Fig. 7, and a small part of the liquid fluid is expelled from the cylinder 10. The fluid expelled passes though the filter 17 and into the sample receptacle 27 while air is vented through the filter 28. The valve member 16 may now be rotated to the position indicated in Fig. 8, and the remaining part of the liquid fluid may be expelled from the cylinder 10. The fluid expelled passes the filter 17 retaining cells therein, and the filtered fluid is returned to the body cavity via the hose 30 and the cannula 29.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Hematology (AREA)
  • Pathology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Investigating Or Analysing Biological Materials (AREA)

Abstract

Dispositif de prélèvement permettant de prélever un échantillon d'un liquide contenant des cellules, tel que le liquide amniotique, dans le du corps d'une personne ou d'un animal. Ce dispositif comprend une seringue (10) dotée d'un réservoir à liquide et d'un tube de prélèvement (29, 30). Un certain volume de liquide peut être aspiré le long d'un premier passage vers le réservoir par l'intermédiaire du tube, et ultérieurement expulsé hors du réservoir le long d'un autre passage. Ce dispositif comprend en outre un ensemble valve (14) pouvant adopter une première position dans laquelle un filtre cellulaire (17) est prévu dans l'un desdits passages, une seconde position dans laquelle le passage restant est délimité de façon qu'il contourne le filtre, et une troisième position dans laquelle le réservoir à liquide communique avec un récipient amovible pour échantillon liquide (27).
EP95940968A 1994-12-09 1995-11-30 Dispositif de prelevement Withdrawn EP0843534A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK141394 1994-12-09
DK141394 1994-12-09
PCT/DK1995/000483 WO1996017550A1 (fr) 1994-12-09 1995-11-30 Dispositif de prelevement

Publications (1)

Publication Number Publication Date
EP0843534A1 true EP0843534A1 (fr) 1998-05-27

Family

ID=8104559

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95940968A Withdrawn EP0843534A1 (fr) 1994-12-09 1995-11-30 Dispositif de prelevement

Country Status (5)

Country Link
EP (1) EP0843534A1 (fr)
JP (1) JPH11514245A (fr)
AU (1) AU4252896A (fr)
CA (1) CA2207276A1 (fr)
WO (1) WO1996017550A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITPA970006A1 (it) * 1997-02-21 1998-08-21 Target Srl Set pediatrico monouso
WO2015090877A1 (fr) * 2013-12-18 2015-06-25 Ge Healthcare Uk Limited Filtre de seringue
GB2523591B (en) * 2014-02-28 2016-03-30 Aspirate N Go Ltd Aspirators
TWI552781B (zh) * 2014-09-30 2016-10-11 Liquid suction and discharge filter
CN104783840B (zh) * 2015-04-24 2017-07-28 方海艳 妇产科羊水取样保存装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT391998B (de) * 1987-02-02 1990-12-27 Falko Dr Skrabal Vorrichtung zur bestimmung der konzentration zumindest einer medizinischen substanz in lebenden organismen
US5000192A (en) * 1990-01-02 1991-03-19 Sealfon Andrew I Prenatal specimen collection method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9617550A1 *

Also Published As

Publication number Publication date
JPH11514245A (ja) 1999-12-07
AU4252896A (en) 1996-06-26
WO1996017550A1 (fr) 1996-06-13
CA2207276A1 (fr) 1996-06-13

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