DE3022499C2 - Method and device for the application of transducers for the determination of the bleeding behavior from standard stab wounds - Google Patents

Description

1.1 At the site of the stab wound to be applied (40) a guide ring (31) is attached in such a way that it concentrically surrounds it

\ 2 The precision snapper (10) is placed on the guide ring (31), essentially perpendicular to the skin surface, in such an angular position that positive guide means (32) of the guide ring (31) mk complementary shaped guide means (12) of the precision snapper (10) come into engagement which guide means force a certain direction or angular position of the Schnepperschneide (11) and thus the cut-like stab wound (41) produced.

13 After removing the precision snapper (10) the Durchflußküvei'i (21) in such a 3s Angular position placed on the guide ring (31) that the positive guide means (32) of the Guide ring (31) with complementary shaped guide means (26) of the flow cell (21) come into engagement in such a way that the open channel section (23) coincides with the standard stab wound (41).

2. The method according to claim 1, characterized in that a double adhesive ring (33) between the guide ring (31) and the surface of the body part (40) through which the Guide ring (31) is fixed on the body surface in the intended position and orientation.

3. The method according to claim 1 and 2, characterized in that the flow cell (21) for the ongoing measurement in the intended position achieved by the enforcement measures and Angular alignment by means of the double adhesive ring (33) according to claim 2 on the skin surface is fixed.

4. Device for performing the method according to claims 1 to 3, characterized by

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4.1 a guide ring (31) to be attached to the skin surface of the body part (40), ar which a standard stab wound (41) is to be made, which has guide means (32) by means of which both the precision snapper ( 10) and for the flow cell (21) which can then be placed on the guide ring (31), a predetermined position and angular alignment is enforced.

4.2 Guide means (12) on the lower face (13) of the precision snapper (10), which is complementary to the guide means (32) of the Guide ring (31) are formed, and

43 by guide means (26) on the flow cell (21) which are complementary to the guide means (32) of the guide ring (31) are.

5. Apparatus according to claim 4, characterized by a double adhesive ring (33) which can be stuck to the skin and is used for fastening the guide ring (31) and for fastening the flow cell (21) on the main surface of the body part (40), on which the standard stab wound (41) is placed centrally to the guide ring and to the double adhesive ring shall be.

6. Apparatus according to claim 4, characterized in that the positive guide means (32) of the Guide ring (31) of two diametrically opposite, out of the plane of the guide ring (31) protruding cams (32) and the associated positive guide means on the precision snapper (10) and on the flow-through cuvette (21) from complementarily shaped to these cams, diametrically opposite and in the edge of the bottom surface of this Parts incorporated incisions or bores (12 or 26) exist.

7. Device according to claims 4 and 6, characterized in that the flow cell (21) has a circumferential groove or groove (25) on the edge of its bottom surface, which is complementary to the Guide ring (31) is shaped so that it is inserted into the flow cell (21) when it is placed Inserting groove or groove and forming a socket for the flow cell (21)

8. Device according to claims 4 to 7, characterized in that the annular surface of the Double adhesive ring (33) is widened inwardly relative to the annular surface of the guide ring (31), so that essentially only the standard stab wound (41) is released from its ring opening (34).

It is a device for determining the bleeding time in an artificially placed small one Known standard stab wounds (Anton H. Sutor et al. Bleeding from Standardized Skin Punctures, American Journal of Clinical Pathology, vol. 55, no. 5, May 1971, pp. 541 ... 550), with which certain blood properties or disorders of hemostasis and coagulation can be diagnosed. This is accompanied by the bleeding time and the characteristic course of the bleeding, the so-called "bleeding picture", continuously through chemical or photoelectric analyzes of the content of the Blood in a liquid rinsing medium is determined via the standardized stab wound of a certain size and shape is directed. For this purpose, a flow cell for the liquid rinsing medium, especially for sterilized Water placed on the wound, the flow channel of which is open to the wound, so that it flows out of the wound exiting blood is taken along by the flushing medium and passed to the measuring and evaluation device. Further Details of this called "hemorrhagometry"

te measurement methods can be found in the cited literature.

Furthermore, a precision snapper is known (DE-AS 2642 8S6), which is responsible for setting the for the called measurement method required standard stab wounds is used to achieve reproducible results. This precision snapper is particularly characterized by its freedom from recoil, so that its handling is easy even for inexperienced medical workers. However, it is both in the setting of the Standard puncture wound using the precision snapper as well as when attaching the flow-through cuvette to the established standard stab wound to ensure that this cut-like standard stab wound is one for the physiological Conditions have a particularly favorable position and orientation and that also that of the standard stab wound open section of the flow channel for the flushing medium in the flow cell exactly above this Standard stab wound comes to lie and has the same orientation. This therefore required another Considerable attention to the medical staff both in the preparation of the precision chopper as well as when attaching the flow cell over the wound created.

The invention specified in claim 1 and claim 4 is therefore based on the object that Method and device for the application of the precision snapper and the transducer for to automate the determination of the bleeding behavior from a standard stab wound in this way and to simplify that inevitably the predetermined correct position and orientation of the knife edge of the Schneppers, the standard stab wound and the flow cell is achieved.

This object is achieved according to the characterizing part of claim 1 or claim 4.

By using specific guide means and a guide ring, the desired position and Alignment of the knife edge of the precision snapper and the flow channel of the flow cell is inevitably brought about, the attention of the medical staff need only be directed to it be that the guide means of the guide ring with the complementary shaped guide means on the Precision Schnepper and engage the flow cell. An advantageous development of the Invention consists in the use of a double adhesive ring, by means of which both the guide ring as also the flow cuvette in the inevitably brought about position and equipment on the body part it is recorded and secured where the blood is to be taken from a standard stab wound.

The invention is explained in more detail below with reference to figures which show an embodiment.

F i g. 1 is a side view of a precision sniper, which is used to produce standard stab wounds

F i g. 2a shows a flow cell conventionally used for hemorrhagometry in a view of its Floor area and fig. 2b in a section parallel to the axis

F i g. 3a shows in section the guide means according to the invention in the form of a ring and its position in relation to FIG the standard stab wound to be generated.

F i g. 3b is a view from above of the arrangement according to FIG. 3a.

The figures are drawn to a ratio of 2: 1, so that they are twice the natural size.

The one with F i g. 1 precision snapper shown in view 10 can be appropriately constructed according to the teaching of DE-AS 26 42 896, so that with him a Recoil-free triggering and piercing of the knife 11 of the precision sniper is reached into the skin. This peculiarity creates one in depth and length reproducible incision wound 41 (see FIGS. 3a and 3b) in the skin area of that part of the body 40 which is well suited for hemorrhagometric measurements, e.g. B. the forearm. With the help of the handle 2 is at Such a Precision Schnepper the firing pin serving to drive the knife 11 is withdrawn until it is held in place by a locking bolt that snaps into place. This locking bolt can by actuating a Push button are disengaged so that the firing pin is released and the knife blade 11 in the Skin surface 40 penetrates. The desired depth of the standard stab wound 41 can be made on the precision sniper can be set.

In order to achieve the object on which the invention is based, a Guide ring 31 applied, which is placed over the part of the body used for the measurement and preferably there is attached by means of a double adhesive ring 33 (see Fig.3a and 3b). The position of the guide ring 31 and its orientation is to be chosen so that the location of the elongated incision to be produced in its Center and its direction with the connection direction between two protruding from the guide ring 31, diametrically opposite guide cam 32 corresponds accordingly are at the Front surface of the precision snapper, from which his knife pops out, two complementary to these Guide cams 32 formed, diametrically opposite incisions or holes 12 attached, so that when the sniper 10 is placed on the guide ring 31, the angular position of the former increases for so long is change, which does not cause any difficulties until the guide cams 32 in these incisions or Engage the holes 12 on the snapper. Since the direction of the knife edge 11 of the sniper is set so that that it coincides with the direction of the connection between the incisions 12 is then inevitable also the longitudinal direction of the standard stab wound 41 set in the body part 40 in the connecting direction between the two guide cams 32 of the guide ring31.

After the standard stab wound 41 has been placed, the precision snap 10 is removed and the flow cell 21 is placed on the guide ring 31 in its place. This is then to be rotated on the guide ring for a long time until the guide cams 32 can snap into two diametrically opposed incisions or bores 26 formed complementarily to them on the edge of the flow cell. The guide ring 31 for its part then engages in the circumferential, collar-shaped incision 25 of the flow-through cuvette 21, so that the guide ring forms a holder for this cuvette. In addition, the bottom surface of the flow cell 21 then comes into contact with the annular zone of the double adhesive ring 33 lying within the guide ring 31 and is held in this position by the adhesive effect. Since the part 23 of the flow channel 22, 23, 24 for the rinsing medium that is open towards the bottom surface extends in the connecting direction between the two incisions or bores 26, it then lies exactly over the standard stab wound 41 and has the same orientation as this. This can

the flushing medium conveyed through the flow channel 22, 23, 24, the blood exiting from the wound 41 carry it with you and send it to the evaluation device.

It can thus be seen that the guide ring 31 and its dimensions, which are based on the dimensions of the Precision snapper 10, its knife edge 11 and the dimensions of the flow cell 2t and its Flow channel 22, 23, 24 are matched for the flushing medium, as well as the complementary shape and arrangement of the guide cams 32 and the Bores and incisions 12 and 26 inevitably the correct and matching position of the standard stab wound 41 to be generated, the Schnepperschneide II and of the part 23 of the flow channel 22, 23 of the flow cell 21 that is open towards the wound. this significantly facilitates the handling of these parts in the case of the hemorrhagometric method described at the beginning Measurement method.

1 sheet of drawings

Claims (1)

Patent claims: 1, method for the application of transducers for the determination of the bleeding behavior from standard stab wounds by first creating a stab wound (41) of standardized dimensions in the skin of a body part (40) of the test subject with the help of a precision snapper (10) and then on this wound (41) a flow cuvette (21) for a liquid rinsing medium is attached, the flow channel (22, 23, 24) of which is open along a channel section (23) to the puncture wound (41) so that the blood exiting from it is carried along by the rinsing medium and fed to a measuring element is s share in the rinsing medium continuously tracked measuring, characterized by the following process steps; is, by means of which the content of blood or blood components: