SE505376C2

SE505376C2 - Device for taking samples in blood donation procedures

Info

Publication number: SE505376C2
Application number: SE9504059A
Authority: SE
Inventors: Erik Bertils
Original assignee: Etg Production Ab
Priority date: 1995-11-15
Filing date: 1995-11-15
Publication date: 1997-08-18
Also published as: SE9504059D0; SE9504059L

Abstract

The hose (2) is emptied of its contents of blood into the blood container (1) by being pressed together and is refilled with mixed blood from the container. The device comprises an apparatus housing (3), an unloading surface (4) on which the blood container is placed for sampling, a hose emptying device (5) comprising two rollers (6) working against each other, a drive unit (13) for driving one or both rollers and a control system (15) for controlling the drive unit. The drive unit comprises a start sensor (16) which monitors when a hose end is pushed into the hose emptying device and starts the drive unit. The hose end is then drawn in between the rollers and is simultaneously pressed together. A stop sensor (17) monitors when the complete hose is fed through the emptying device and stops the drive unit. A changeover unit (18) reverses the drive unit to a feed-back direction for the hose.

Description

505 376 10 15 20 25 30 35 Figur 2 visar samma provtagningsanordning sedd uppifrån med ett snitt genom slangtömningsanordningen. 505 376 10 15 20 25 30 35 Figure 2 shows the same sampling device seen from above with a section through the hose emptying device.

Figur 3 visar samma provtagningsanordning sedd bakifrån.Figure 3 shows the same sampling device seen from behind.

Provtagningsanordning enligt uppﬁnningen är således avsedd för användning vid uttagande av ett för innehållet i en blodbehållare 1 representativt prov i en till blod- behållaren ansluten kollaberbar slang 2 genom ett förfarande som innefattande tömning av slangen på dess innehåll av blod till blodbehållaren genom samman- pressning av slangen och återfyllning av slangen med blod från blodbehållaren.The sampling device according to the invention is thus intended for use in taking a sample representative of the contents of a blood container 1 in a collapsible hose 2 connected to the blood container by a method which comprises emptying the tube of its blood content into the blood container by compressing the tubing and refilling the tubing with blood from the blood vessel.

Tömningen och återfyllningen av slangen kan upprepas flera gånger vid samma provtagningstillfälle innan slangen försluts i en eller flera provsektioner med en slangsvets. Mellan tömning och återfyllning av slangen blandas blodet genom t.ex. vaggning av blodbehållaren.The emptying and refilling of the hose can be repeated several times at the same sampling time before the hose is sealed in one or more sample sections with a hose weld. Between emptying and refilling the hose, the blood is mixed by e.g. rocking of the blood vessel.

Anordningen innefattar ett apparathus 3; en avlastningsyta 4 på vilken den för provtagning avsedda blodbehållaren 1 placeras; en slangtömningsanordning 5 innefattande två mot varandra verkande rullar 6 och 7; en drivenhet 13 för drivning av en eller båda rullama och ett styrsystem 15 för styming av drivenheten.The device comprises an apparatus housing 3; a relief surface 4 on which the blood container 1 intended for sampling is placed; a hose emptying device 5 comprising two opposing rollers 6 and 7; a drive unit 13 for driving one or both rollers and a control system 15 for controlling the drive unit.

Styrsystemet innefattar en startsensor 16, en stoppsensor 17 och en omkopplare 18. Startsensom är anordnad att känna av när en slangände förs in i slangtöm- ningsanordningen 5 och starta drivenheten 13, varvid slangänden dras in mellan rullama 6 och 7 under samtidig sammanpressning av slangen. Stoppsensom 17 är anordnad att känna av när hela slangen matats in i slangtömningsanordningen och stoppa drivenheten och omkopplaren 18 är anordnad att reversera drivenheten 13 till en återmatningsriktning för slangen.The control system comprises a start sensor 16, a stop sensor 17 and a switch 18. The start sensor is arranged to detect when a hose end is inserted into the hose emptying device 5 and start the drive unit 13, the hose end being pulled in between the rollers 6 and 7 while simultaneously compressing the hose. The stop sensor 17 is arranged to sense when the entire hose is fed into the hose emptying device and to stop the drive unit and the switch 18 is arranged to reverse the drive unit 13 to a return direction of the hose.

I den i figurema visade utföringsforrnen utgörs avlastningsytan 4 av ett lutande plan på apparathuset 3. Slangtömningsanordningen 5 är anordnad som en uppstickande del vid avlastningsytans övre ände. Förutom rullar innefattar slangtömningsanord- ningen 5 en skärm 8, som sträcker sig över rullama och är förskjutbart fäst i appa- rathuset i två fästpunkter 11 och 12 (fig. 3). Skärmen har en ingångsöppning 9 för den slang 2 som ska tömmas på blod. lngångsöppningen är vänd mot avlastnings- ytan 4 och i skärmens motsatta ände finns en motsvarande utgångsöppning 10 för den tömda slangdelen. Rullama består av en drivrulle 6, som via en axel 14 är för- bunden med drivenheten 13, och en mothållsrulle 7, som med fjäderkraft pressar mot drivrullen och följer dess rotation. Drivenheten utgörs lämpligen av en reverser- 10 15 20 25 30 35 fsos 576 bar elektrisk motor. Under skärmen, innanför ingångsöppningen 9 sitter styrsyste- mets startsensom 16, som kan bestå av en fotocell som känner av när slangänden sticks in i ingångsöppningen. Skärmens infästning 11 och 12 i apparathuset består av två stift (ﬁg. 1) som går genom hål i apparathusets vägg och på insidan är för- sedda med fjädrar som pressar skärmen mot apparathuset. När skärmen utsätts för en kraft mot sin inloppssida (vid ingångsöppningen) förskjuts skärmen mot kraften i dessa fjädrar. Styrsystemets stoppsensor 17, som i figuren visas som en lägesbry- tare, aktiveras av denna förskjutning och stoppar drivenheten. Styrsystemet kan vidare innefatta en tidsfördröjningsanordning 19 som aktiveras av lägesbrytaren och efter en inställt tidsperiod återstartar drivenheten, via omkopplaren 18. l stället för en tidsfördröjningsanordning kan även drivenheten återstartas manuellt.In the embodiment shown in the figures, the relief surface 4 consists of an inclined plane of the apparatus housing 3. The hose emptying device 5 is arranged as a protruding part at the upper end of the relief surface. In addition to rollers, the hose emptying device 5 comprises a screen 8, which extends over the rollers and is slidably attached to the apparatus housing at two attachment points 11 and 12 (Fig. 3). The screen has an inlet opening 9 for the hose 2 to be emptied of blood. The inlet opening faces the relief surface 4 and at the opposite end of the screen there is a corresponding outlet opening 10 for the emptied hose part. The rollers consist of a drive roller 6, which is connected via a shaft 14 to the drive unit 13, and an abutment roller 7, which presses with spring force against the drive roller and follows its rotation. The drive unit suitably consists of a reversible 576 bar electric motor. Below the screen, inside the entrance opening 9, is the control system's start sensor 16, which may consist of a photocell which senses when the hose end is inserted into the entrance opening. The attachment 11 and 12 of the screen to the device housing consists of two pins (ﬁ g. 1) which pass through holes in the wall of the device housing and on the inside are provided with springs which press the screen against the device housing. When the screen is subjected to a force against its inlet side (at the entrance opening), the screen is displaced against the force in these springs. The control system stop sensor 17, which is shown in the figure as a position switch, is activated by this displacement and stops the drive unit. The control system may further comprise a time delay device 19 which is activated by the position switch and after a set time period restarts the drive unit, via the switch 18. Instead of a time delay device the drive unit can also be restarted manually.

Anordningen fungerar på följande sätt: Blodbehållaren 1 placeras på den lutande avlastningsytan 4 och den vidhängande kollaberbara slangen 2 sticks in i slangtömningsanordningens 5 ingångsöppning 9.The device works as follows: The blood container 1 is placed on the inclined relief surface 4 and the attached collapsible hose 2 is inserted into the entrance opening 9 of the hose emptying device 5.

Fotocellen 16 känner av slangen och startar drivenheten 13, som via axeln 14 rote- rar drivrullen 6 i inmatningsriktning för slangen. Mothållsrullen 7 roterar med drivrul- len och den fri slangänden dras in i nypet mellan rullama. Slangen sammanpressas i sin helhet från sin yttersta spets och blodet i slangen trycks in i blodbehållaren allteftersom slangen matas fram mellan rullama. Den tömda slangdelen förs ut genom utgångsöppningen 10 (fig. 3) varvid operatören kan inspektera att den blivit helt tömd på blod. När hela slangen matats in i slangtömningsanordningen 5 dras blodbehållaren 1 mot skännen 8, som då förskjuts bakåt i sina infästningspunkter 11 och 12 i apparathuset 3. Lägesbrytaren 17 aktiveras av denna förskjutning och stoppar drivenheten 13. Samtidigt aktiveras tidsfördröjningsanordningen 19, som efter en förvald tid återstartar drivenheten via omkopplaren 18. Omkopplaren rever- serar motoms drivriktning, varvid rullama 6 och 7 matar tillbaka slangen som därvid återfylls med blod från blodbehållaren. Under den tid som slangtömningsanord- ningen står stilla med tömd slang, blandas blodet genom vaggnlng av blodbehålla- ren. Vaggningen kan ske manuellt eller med en i apparaten inbyggd vaggningsan- ordning, som t.ex. vaggar den lutande avlastningsytan 4 eller apparathuset 3 i dess helhet. Förfarandet kan upprepas flera gånger och efter den sista utmatningen och återfyllningen av slangen sektioneras den i en eller flera provsektioner med en slangsvets.The photocell 16 senses the hose and starts the drive unit 13, which via the shaft 14 rotates the drive roller 6 in the feed direction for the hose. The abutment roller 7 rotates with the drive roller and the free hose end is pulled into the nip between the rollers. The tubing is compressed in its entirety from its outermost tip and the blood in the tubing is forced into the blood vessel as the tubing is fed between the rollers. The emptied hose part is led out through the outlet opening 10 (Fig. 3) whereby the operator can inspect that it has been completely emptied of blood. When the entire hose is fed into the hose emptying device 5, the blood container 1 is pulled towards the scaffolds 8, which are then displaced backwards at their attachment points 11 and 12 in the apparatus housing 3. The position switch 17 is activated by this displacement and stops the drive unit 13. At the same time the time delay device 19 is activated. restarts the drive via the switch 18. The switch reverses the drive direction of the motor, whereby the rollers 6 and 7 feed back the hose, which is then refilled with blood from the blood vessel. During the time that the hose emptying device is stationary with the hose emptied, the blood is mixed by rocking the blood container. The rocking can be done manually or with a rocking device built into the device, such as rock the inclined relief surface 4 or the apparatus housing 3 in its entirety. The process can be repeated several times and after the last discharge and refilling of the hose, it is sectioned in one or more test sections with a hose weld.

Claims

505 376 10 15 20 25 30 35 Patent claims:

Sampling device for taking a sample representative of the contents of a blood container (1) in a collapsible hose (2) connected to the blood container, the hose being emptied of its content of blood into the blood container by compression and refilling with mixed blood from the blood container , characterized in that the device comprises an apparatus housing (3); a relief surface (4) on which the blood vessel for sampling is placed; a hose emptying device (5) comprising two opposing rollers (6,7); a drive unit (13) for driving one or both rollers; a control system (15) for controlling the drive unit comprising a starting sensor (16) arranged to detect when a hose end is inserted into the hose emptying device (5) and start the drive unit (13), the hose end being pulled in between the rollers during simultaneous compression of the hose; a stop sensor (17) which is arranged to sense when the entire hose has been fed through the hose emptying device and to stop the drive unit and a switch (18) arranged to reverse the drive unit to a return direction for the hose.

Device according to claim 1, characterized in that the control system (15) comprises a time delay device (19) which is arranged to be activated by the stop sensor (17) and after a predetermined time restarts the drive unit in the feedback direction.

Device according to Claim 1, characterized in that the relief surface (4) consists of an inclined plane of the apparatus housing (3).

Device according to claim 1, characterized in that the hose emptying device (5) comprises a screen (8) which covers the rollers (6,7) and is slidably attached to the apparatus housing and has an inlet opening (9) for the hose to be emptied of blood and outlet opening (10) for the emptied hose part.

Device according to Claim 1, characterized in that the rollers consist of a drive roller (6) whose shaft (14) is coupled to the drive unit (13) and an abutment roller (7) which bears against the drive roller with spring force. 10 isos 376

Device according to Claim 1, characterized in that the drive unit (13) consists of a reversible electric motor.

Device according to Claim 1, characterized in that the starting sensor (16) consists of a photocell which is arranged inside the inlet opening (9) of the hose emptying device.

Device according to Claim 1, characterized in that the stop sensor (17) is arranged at the displaceable attachment (11, 12) of the insert in the apparatus housing and is arranged to sense a displacement of the shield (8) which occurs when the entire hose is fed into the emptying device. so that the bdod container is pressed against the screen.

Device according to Claim 8, characterized in that the stop sensor (17) consists of a position switch.