SE512552C2

SE512552C2 - Puncture guide for computer tomography

Info

Publication number: SE512552C2
Application number: SE9000878A
Authority: SE
Inventors: Dan Aakerfeldt; Anders Magnusson
Original assignee: Bard Inc C R
Priority date: 1989-11-27
Filing date: 1990-03-12
Publication date: 2000-04-03
Also published as: SE9000878D0; SE9000878L

Abstract

The equipment includes a support for locating a fixed reference point adjacent to a patient's body. A path is computed and a predefined direction through the puncture entry point is adjusted using the support. An instrument holder moves the puncture instrument along the defined path. Depth of penetration is determined and the extent of the movement of the instrument along the predetermined path is limited.

Description

Ulià äsümml 512 552 figur 3 är en sidosektionsvy av en hållare och en hylsa för en biopsiprovtagare eller dylikt, som visar hylsans rekylmotverkande fäste eller stoppanslag i ingrepp med hållarens hylla; och figur 4 är en planvy av biopsiprovtagarhållaren. Ulià äsümml 512 552 figure 3 is a side sectional view of a holder and a sleeve for a biopsy sampler or the like, showing the recoil-retaining bracket or stop stop of the sleeve in engagement with the holder's shelf; and Figure 4 is a plan view of the biopsy sampler holder.

I figur l visas en hållare av en punktionsanordning allmänt betecknad med hänvisningssiffran 10. Hållaren 10 innefattar ett styrelement 1, ett laxstjärtspår 5 med en förskjutbar hylla 6, en skruv 7 som är i ingrepp med hyllan 6 för varierbar höjdin- ställning av densamma medelst en skruvskalle 8, varvid höjdin- ställningen motsvarar det inställda nåldjupet och avläses på skalor 9.Figure 1 shows a holder of a puncture device generally designated by the reference numeral 10. The holder 10 comprises a guide element 1, a salmon tail groove 5 with a displaceable shelf 6, a screw 7 which engages the shelf 6 for variable height adjustment thereof by means of a screw head 8, the height setting corresponding to the set needle depth and being read on scales 9.

I figur 2 är en hylsa 2 anordnad i spåret 5. Hylsan 2 uppbär en biopsiprovtagare ll innefattande en nål 12, som styrs i en ej visad nàlstyrning i styrelementet l, vilket beskrivits i vår under behandling varande ansökan.In Figure 2, a sleeve 2 is arranged in the groove 5. The sleeve 2 carries a biopsy sampler 11 comprising a needle 12, which is guided in a needle guide (not shown) in the guide element 1, as described in our application pending.

Figur 3 visar en hållare 10 med en hylsa 2 med delvis bortskurna delar som är belägen i det nedersta läget av spåret 5, dvs på hyllan 6. Nedan kommer hylsans 2 fäste eller stoppanslag vid den i spåret 5 belägna hyllan 6 att beskrivas i anslutning till fig 3-4. Hyllan 6 är enligt föreliggande uppfinning försedd med en uppåtstående, fribärande tapp 4 med en förtjockad skalle 4a. I övrigt överenstämmer hyllans utformning och funktion med vår under behandling varande ansökan. Hylsan 2 är nedtill försedd med en utbuktning 2a av sådan storlek att den passar i utrymmet mellan hyllans 6 bottenyta eller anslagsyta 6b och tappens förtjockade skalle 4a. Hylsan 2 är glidbart anordnad i spåret 5 såsom visas i fig 4 och när hylsan 2 har skjutits till botten av spåret 5, dvs till hyllans 6 bottenyta 6b, snäpper hylsans utf buktning 2a in i mellanrummet mellan bottenytan 6b och tappens 4 förtjockade skalle 4a, varvid bottenytan 6b ligger an mot utbuktningens 2a undre yta 2b. Genom denna utformning av fästet eller stoppanslaget enligt föreliggande uppfinning sitter hylsan IM 4:; Il 512 552 3 2 stadigt fast på hàllaren 10 och därmed förhindras rekyl av biopsiprovtagarens nål vid punktionen.Figure 3 shows a holder 10 with a sleeve 2 with partially cut away parts which are located in the lowest position of the groove 5, i.e. on the shelf 6. Below, the attachment or stop stop of the sleeve 2 to the shelf 6 located in the groove 5 will be described in connection with fig 3-4. According to the present invention, the shelf 6 is provided with an upright, cantilevered pin 4 with a thickened skull 4a. In other respects, the design and function of the shelf correspond to our application under consideration. The sleeve 2 is provided at the bottom with a bulge 2a of such a size that it fits in the space between the bottom surface or abutment surface 6b of the shelf 6 and the thickened skull 4a of the pin. The sleeve 2 is slidably arranged in the groove 5 as shown in Fig. 4 and when the sleeve 2 has been pushed to the bottom of the groove 5, i.e. to the bottom surface 6b of the shelf 6, the bulge 2a of the sleeve snaps into the space between the bottom surface 6b and the thickened skull 4a 4. wherein the bottom surface 6b abuts against the lower surface 2b of the bulge 2a. By this design of the bracket or stop according to the present invention, the sleeve IM 4:; 512 552 3 2 firmly attached to the holder 10 and thus prevent recoil of the biopsy sampler's needle at the puncture.

Claims

512 552 PATENT REQUIREMENTS

A stop stop for a sleeve (2) which is slidably arranged in a dovetail groove (5) of a holder (10), which stop stop is arranged adjustably along the length of a longitudinally extending holder (10) for a biopsy sampler device (II), detachably attached to a puncture device, for adjusting the penetration depth of the biopsy sampler, and having a shelf (6) with a stop surface (6b) intended to cooperate with a stop surface (2b) on the sleeve (2) to limit the displacement of the sleeve (2) along the salmon tail groove (5), characterized in that the stop stop comprises a projecting part (4,4a) located on the shelf (6) and a bulging part (2a) located on the sleeve (2), which parts are shaped to each other and form a firm attachment of the sleeve (2) to the holder (10) as they snap into each other, thereby preventing recoil of the biopsy sampler needle from puncture.

Stop stop according to claim 1, characterized in that it comprises on the one hand an upright, cantilevered pin (4) located at the shelf (6) with a thickened skull (4a) and on the other hand a bulging part (2a) of the sleeve (2), which bulged part cooperates with the pin (4) to snap into the space between the bottom surface (6b) of the shelf (6) and the thickened skull (4a) of the pin (4), the bottom surface (6b) abutting against a lower surface (2b) of the bulge (2a). lw