CAPILLARY BLOOD SAMPLING

Abstract

The present disclosure relates to capillary blood sampling. In one aspect, the present disclosure provides a finger lancing device comprising a body having a chamber for receiving a finger and a lancing device comprising a lancing member actuator for actuating a lancing member to lance a finger received in the chamber.

Claims

1. A finger lancing device comprising: a body having a chamber for receiving a finger; and a lancing device comprising a lancing member actuator for actuating a lancing member to lance a finger received in the chamber.

2. A finger lancing device according to claim 1, further comprising the lancing member, wherein the lancing member actuator is configured to actuate the lancing member to lance the finger inserted into the chamber.

3. A finger lancing device according to claim 1 or claim 2, further comprising a wipe provided within the chamber for wiping the finger before lancing.

4. A finger lancing device according to claim 3, wherein the wipe is provided on a wall of the chamber, optionally near an end of the chamber for receiving the finger.

5. A finger lancing device according to any preceding claim, further comprising an absorbent wipe provided on a wall of the chamber for wiping away a first drop of blood.

6. A finger lancing device according to any preceding claim, further comprising an openable seal, the openable seal being at an end of the chamber for receiving the finger.

7. A finger lancing device according to claim 6 when dependent on claim 3, wherein the wipe is provided on the openable seal, optionally on the inner side of the openable seal.

8. A finger lancing device according to any preceding claim, further comprising a capillary collection device for collecting a blood sample from the finger received in the chamber.

9. A finger lancing device according to claim 8, wherein the capillary collection device has a fill line to indicate a volume of blood required.

10. A finger lancing device according to any preceding claim, wherein the body is flexible.

11. A finger lancing device according to any preceding claim, wherein the body is transparent.

12. A body for a finger lancing device comprising a chamber for receiving a finger, wherein the body comprises a hole for receiving a lancing device.

13. A body according to claim 12, further comprising an openable seal covering the hole for receiving the lancing device.

14. A body according to claim 12 or claim 13, wherein the body further comprises a hole for receiving a capillary collection device.

15. A body according to claim 14, further comprising an openable seal covering the hole for receiving the capillary collection device.

16. A body according to any of claims 12 to 15, further comprising an openable seal, the openable seal being at an end of the chamber for receiving the finger.

17. A finger lancing device according to claim 16, wherein a wipe for wiping the finger before lancing is provided on the openable seal, optionally on the inner side of the openable seal.

18. A kit comprising a body according to any of claims 12 to 17 and at least one of a lancing device or a capillary collection device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Embodiments will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0031] FIG. 1 illustrates a finger lancing device in the form of a blood collection device;

[0032] FIG. 2 illustrates a hand next to the blood collection device before the little finger of the hand is inserted into the device;

[0033] FIG. 3 illustrates the hand and device with the little finger of the hand inserted into or received within the chamber of the device;

[0034] FIG. 4 is a cross-sectional side view of the blood collection device;

[0035] FIG. 5 is a cross-sectional perspective view of the blood collection device;

[0036] FIG. 6 is a cross-sectional end view of the blood collection device using the same cross section as FIG. 5;

[0037] FIG. 7 shows the finger in a position where a drop of blood from the lanced site on the finger has been brought into contact with the end of the capillary collection device of the blood collection device; and

[0038] FIGS. 8A and 8B illustrate perspective views of the blood collection device showing an openable seal.

DETAILED DESCRIPTION

[0039] FIG. 1 illustrates a finger lancing device which in this implementation is a blood collection device 100. The device 100 comprises a body 102 having a space or chamber within it for receiving a finger. The device 100 also comprises a lancing device 104 connected to the body. The lancing device 104 comprises a lancet or lancing member within it which is arranged to lance into the space within the body 102. The lancing device 100 also comprises a lancing member actuator for activating the lancing member. The device 100 also comprises a capillary collection device 106. One end of the capillary collection device 106 is arranged to open into the chamber within the body 102.

[0040] The device 100 can be used to obtain a blood sample from a finger. To do this, the end of a finger is inserted into the chamber and the lancing member actuator is activated by pressing its end so that the lancing member inside it pierces the skin of the end of the finger within the chamber. The finger is then turned so that the blood touches the end of the capillary collection within the chamber so that the blood is drawn into the capillary collection device 106 by capillary action.

[0041] The lancet or lancing member may be provided as a separate, disposable component.

[0042] The device need not comprise a capillary collection device. Such a configuration can be used as a finger lancing device (as opposed to a blood collection device). In such a configuration, the finger lancing device may be used to prick the finger before removing the finger. In this way, the blood can be applied to a separate transfer or collection device such as a capillary collection device, e.g. a capillary tube.

[0043] FIG. 2 illustrates a hand 200 next to the blood collection device 100 before the little finger of the hand is inserted into the device 100. The body 102 of the device has an opening to the chamber inside the body into which the finger is inserted.

[0044] FIG. 3 illustrates the hand 200 and device 100 with the little finger of the hand inserted into or received within the chamber.

[0045] FIG. 4 is a cross-sectional side view of the blood collection device 100 and hand 200 in which the little finger 126 has been inserted into the chamber 103 of the body 102. The figure shows the little finger 126 in a position where the lancing device 104 can be activated to prick the finger.

[0046] The body 102 is generally circular in cross section and the chamber 103 or space inside the body for receiving the finger is generally cylindrical in shape.

[0047] A wipe 110 is provided within the chamber 103 on a wall of the chamber. The wipe is for wiping the finger before lancing. As the finger is inserted into the chamber 103 (before reaching the position depicted) the wipe 110 is used to wipe the finger clean. The wipe 110 is provided within the chamber on a wall of the chamber between the opening 105 and the point where the lancing member will prick the finger so that, as the finger enters the chamber 103, the finger is wiped on wipe 110. The wipe 110 can be positioned in any suitable position for wiping the finger, and in this example is provided near the opening. The wipe 110 in this example is a 70% alcohol wipe.

[0048] An elastomeric ring 108 is provided within the chamber on a wall of the chamber. The ring 108 helps guide the finger and can provide an interference fit to accommodate different finger sizes. In a configuration with an elastomeric ring, the body 102 may be made of a rigid material such as plastic, though other less rigid/flexible materials may be used.

[0049] FIG. 5 is a cross-sectional perspective view of the device 100. The cross section has been taken along a plane cutting through the body 102, chamber 103, lancing device 104 and capillary collection device 106. FIG. 6 is a cross-sectional end view of the device 100 which uses the same cross section. FIG. 6 is a magnified view when compared to FIG. 5 and does not show the whole lancing device 104 or the whole capillary collection device 106.

[0050] Referring to FIG. 5, the device 100 is shown with the body 102, chamber 103, lancing device 104 and capillary collection device 106. As illustrated, the lancing device 104 comprises a lancing member actuator 114 and a lancing member 124 (or lancet). Finger 126, which has been inserted into the chamber 103 can be pricked by pressing the actuator 24 which is arranged to drive the lancing member towards the finger so that the lancing member pricks the finger. The capillary collection device comprises a capillary tip 111 and is described in more detail below with reference to FIG. 7.

[0051] Lancing devices such as lancing device 104 are known and are commercially available. One example lancing device is the Accu-Chek™ Safe-T Pro Plus lancing device available from Roche Diagnostics, a division of F Hoffmann-La Roche AG. Embodiments may use any lancing device, including commercially available devices, such as those available from Roche Diagnostics, or a specially designed device. The lancing device 104 is connected to the body 102. As can be seen, the lancing device 104 connects to body 102 via a hole 115 for receiving the lancing device 104. In the depicted configuration the lancing device is held in the hole 115 through a press or friction fit. In other configurations, the lancing device 104 can be bonded to the body, for example with a suitable adhesive such as a silicone adhesive.

[0052] Referring to FIG. 6, an absorbent wipe 112 is provided on the wall of the chamber between the lancing device 104 and the capillary collection device 106. More specifically, the wipe is provided inside the chamber on the wall of the chamber between the position where the lancing member enters the chamber and the position where the opening of one end of the capillary tip of the capillary collection device connects to the chamber. As can be seen, the wipe 112 is held in place by L-shaped formations 121 and projection 123.

[0053] After the finger has been pricked using the lancing device, the finger can be rotated within the chamber in the direction of the wipe 112. The first drop of blood can be absorbed by the wipe 112. The finger can then be rotated further in the same direction so that blood from the lanced finger comes into contact with the end of the end of capillary tip 111 of the capillary collection device 106. Blood is then drawn into the capillary collection device.

[0054] Referring to FIG. 7, the figure shows the finger in a position where a drop of blood 113 from the lanced site on the finger has been brought into contact with the end of the capillary tip 111 of the capillary collection device 106.

[0055] As mentioned above, the capillary collection device 106 comprises a capillary tip 111. One end of the capillary tip fits into a hole 119 in the body 102 and at the other end there is a fill line 116 to indicate a volume of blood required. The device 106 also comprises a filter at the end of the capillary tip, just beyond the fill line. The device also comprises a piston 107 that sits within a piston housing. The piston 107 is provided with a ventilation hole at the end. After the capillary tip 111 of the collection device is filled to the fill line with blood, the device can be removed from the body 102 and the piston 107 can be used to dispense the blood sample.

[0056] Capillary collection devices such as the capillary collection device 106 are known and are commercially available. One example capillary collection device is the Minivette™ POCT collection device available from Sarstedt AG & Co. Embodiments may use any capillary collection device, including commercially available devices, such as those available from Sarstedt AG & Co, or a specially designed device. The capillary collection device 106 is connected to the body 102. As can be seen, the capillary collection device 106 connects to body 102 via a hole 119 for receiving the lancing device 104. In the depicted configuration the capillary collection device is held in the hole 119 through a press or friction fit. In other configurations, other ways of connecting the components may be used.

[0057] In some configurations the capillary and fill area are visible so the operator can see the blood flow in and know whether any ‘milking’ of the finger to express further blood is needed.

[0058] The device 100 can be provided with an openable seal which seals the opening of the chamber 103. FIGS. 8A and B depict perspective views of the device 100 with an openable seal 130. In FIG. 8A the seal is sealed and in FIG. 8B the seal is depicted in a near removed position. In this embodiment the seal 130 is a peelable film seal that is applied to the body chamber to keep the device sealed from the external environment and to help prevent the wipe 110 drying out. The seal can be made of any commercially available sealing film such as a medical grade sealing film (e.g. a plastic film, typically a polyester film). An adhesive such as a medical grade silicone or acrylic adhesive can be used to adhere the seal 130 to the body 102. The wipe 110 can be provided on the inside of the openable seal instead of being provided on a wall of the chamber. Wipes in both locations can be provided in some configurations.

[0059] In some configurations, the body 102 is flexible. That is, the body is made from a flexible material so that further drops of blood can be expressed from the finger 126 through the body 102. Such configurations may not include an elastomeric ring.

[0060] In some configurations, the body 102 is transparent.

[0061] The body 102 may be made of any suitable material. In some configurations, the body is made from a silicone, urethane or any medical grade elastomer. The body can be made in any suitable way. One way of making the body is using a mould.

[0062] The body 102 has been described in connection with the lancing device 104 and the capillary collection device 106. The body can be made as a separate component and later connected to the lancing device and the capillary collection device. The body 102 can be produced and sold separately, for the user to assemble with a lancing device and/or a capillary collection device that they have sourced separately. The finger lancing device 100 may be pre-assembled and sold in pre-assembled form. The finger lancing device 100 may be sold as a kit of parts comprising the body and one or both of the lancing device 104 and capillary collection device 116. The holes 115 and 119 may each be sealed with a removable seal when the body is provided on its own or as a kit of unassembled parts. The seals can be made of any commercially available sealing film such as a medical grade sealing film (e.g. a plastic film, typically a polyester film). An adhesive such as a medical grade silicone or acrylic adhesive can be used to adhere the seals to the body 102.

[0063] The lancing device and capillary collection device can be commercially available devices such as those referenced above. The lancing device and capillary collection device are typically disposable components. The body of the finger lancing device/blood collection device may also be disposable or may be used more than once, particularly in a simple embodiment without any one-use components.

[0064] The embodiments of the invention shown in the drawings and described above are exemplary embodiments only and are not intended to limit the scope of the appended claims, including any equivalents as included within the scope of the claims. Various modifications are possible and will be readily apparent to the skilled person in the art. It is intended that any combination of non-mutually exclusive features described herein are within the scope of the present invention. That is, features of the described embodiments can be combined with any appropriate aspect described above and optional features of any one aspect can be combined with any other appropriate aspect.