EXTRACTION DEVICE FOR COLLECTING BLOOD SAMPLES, INCLUDING A CATHETER AND A SAFETY SYSTEM

Abstract

Provided is an Extraction Device for Collecting Blood Samples, including a Catheter and a Safety System EDCBSCSS wherein a catheter is inserted through a cannula, which retracts once the catheter is inside a vein, by means of a spring and safety latch mechanism, retaining the cannula within a housing. The retracted cannula remains immobile within the housing thus avoiding reutilization of the devise and accidental puncture wounds during its disposal. This EDCBSCSS has the advantages (a) among others of assuring that the cutting element has been disabled; (b) possessing a safety system for medical personal so that after the procedure no accidental puncture wounds occur and (c) being easy to handle. The EDCBSCSS is made up of three sequential operational systems, which are puncturing and retracting system which are located within housings and comprise a puncturing cannula; a catheter; a catheter space, a spring and a safety latch.

Claims

1. An Extraction Device for Collecting Blood Samples, including a Catheter and a Safety System EDCBSCSS wherein the Extraction Device comprises a catheter (2) which encloses a puncturing cannula (1); the catheter surrounds the puncturing cannula (1) and is connected to a catheter space (3), wherein said catheter space is connected to housing components (5) and (4), said puncturing cannula is connected to a safety latch (8) which is within the housing components (5) and (4); wherein a cap space (6) is connected the end opposite of the end of the catheter housing (3) from which the catheter protrudes; wherein said cap space (6) is connected to a cap (7); and wherein a spring (9) is located between the safety latch (8) and the puncturing cannula space (1), wherein the spring pushes the safety latch (8) once the safety latch (8) is free, in order to retrieve the puncturing cannula (1), and wherein an activation of the safety latch houses the an extraction cannula (10) within the cap and through the cap space.

2. The Extraction Device for Collecting Blood Samples, including a the Catheter and the Safety System EDCBSCSS as claimed in claim 1, wherein the puncturing cannula (1) and the extraction cannula (10) being linked to the safety latch (8) which is fixed inside the housings (4) and (5); the safety latch (8) is pushed by the spring (9) located between the safety latch (8) and the catheter space (3), in a charge state activated by the spring, the puncturing cannula (1) is within the catheter (2), while the collecting cannula is outside the cap (7) but inside a pivot guide (63) of the cap space (6) in the charge state the EDCBSCSS is ready for a puncturing procedure and placing of the catheter (2) in order to proceed with extracting blood, once the catheter (2) is in a vein, a retraction mechanism of the puncturing cannula (1) is activated and the extraction cannula is ready for collecting a blood sample.

3. The Extraction Device for collecting Blood Samples, including a the Catheter and the Safety System EDCBSCSS, as described in claim 1 above, wherein the cap space (6) which is joined to the components, the cap (7), the extraction cannula (10) and a tube holder (13) form the collecting system of the EDCBSCSS.

4. The Extraction Device for Collecting Blood Samples, including a the Catheter and the Safety System EDCBSCSS, as described in claim 1 wherein, the housing (5), a head of the safety latch (82), a neck of the safety latch (85) which when activated disconnect housing (5) and slide due to decompression of the spring (9), and the safety latch (8) will shift within the housing components (4) and (5) guided by housing guides (41) until the safety latch (8) connects by way of the safety latch head (82) with a rear anchoring slot (52), remaining fixed in position connected by the safety latch head (82) with the rear anchoring slot (52), and wherein the puncturing cannula (1), upon being attached to the safety latch (8) will move together with the safety latch (8), so that only the catheter (2) remains inside the vein while the extraction cannula (10) joined to the safety latch (8) will slide inside the cap (7) which constitute a system for blood collection.

5. The Extraction Device for Collecting Blood Samples, including a the Catheter and the Safety System EDCBSCSS, as described in claim 1 wherein, the safety latch (8) comprises of a rectangular base (88) with two slide guides (83) in the lower part located on each side of the rectangular base (88) the two slide guides (83) along with housing guides (41) control the direction of the displacement of the safety latch (8); on a top part of the rectangular base (88), a pliable neck (85) protrudes and on a tip of the pliable neck (85) is a head of the safety latch (82); wherein a function of the head of the safety latch (82) is to insert in the front anchoring slot (53) to conform a charge state of the EDCBSCSS and also the head of the safety latch (82) is inserted into a rear anchoring slot in order to activate the collection and safety systems of the EDCBSCSS.

6. The Extraction Device for Collecting Blood Samples, including a the Catheter and the Safety System EDCBSCSS, as described in claim 1 wherein, the catheter space (3), the catheter housings (4) and (5), the cap space (6) and the cap (7) all joined together to form a single body.

7. The Extraction Device for Collecting Blood Samples, including a the Catheter and the Safety System EDCBSCSS, as described in claim 1 which further comprises, a safety system in which housings (4) and (5) act simultaneously with the safety latch (8), the puncturing cannula (1) and the spring (9).

8. The Extraction Device for Collecting Blood Samples, including the Catheter and the Safety System EDCBSCSS, as described in claim 2 wherein, the housing (5), a head of the safety latch (82), a neck of the safety latch (85) which when activated disconnect housing (5) and slide due to decompression of the spring (9), and the safety latch (8) will shift within the housing components (4) and (5) guided by housing guides (41) until the safety latch (8) connects by way of the safety latch head (82) with a rear anchoring slot (52), remaining fixed in position connected by the safety latch head (82) with the rear anchoring slot (52), and wherein the puncturing cannula (1), upon being attached to the safety latch (8) will move together with the safety latch (8), so that only the catheter (2) remains inside the vein while the extraction cannula (10) joined to the safety latch (8) will slide inside the cap (7) which constitute a system for blood collection.

9. The Extraction Device for Collecting Blood Samples, including the Catheter and the Safety System EDCBSCSS, as described in claim 3 wherein, the housing (5), a head of the safety latch (82), a neck of the safety latch (85) which when activated disconnect housing (5) and slide due to decompression of the spring (9), and the safety latch (8) will shift within the housing components (4) and (5) guided by housing guides (41) until the safety latch (8) connects by way of the safety latch head (82) with a rear anchoring slot (52), remaining fixed in position connected by the safety latch head (82) with the rear anchoring slot (52), and wherein the puncturing cannula (1), upon being attached to the safety latch (8) will move together with the safety latch (8), so that only the catheter (2) remains inside the vein while the extraction cannula (10) joined to the safety latch (8) will slide inside the cap (7) which constitute a system for blood collection.

10. The Extraction Device for Collecting Blood Samples, including the Catheter and a the Safety System EDCBSCSS, as described in claim 2 wherein, the safety latch (8) comprises of a rectangular base (88) with two slide guides (83) in the lower part located on each side of the rectangular base (88) the two slide guides (83) along with housing guides (41) control the direction of the displacement of the safety latch (8); on a top part of the rectangular base (88), a pliable neck (85) protrudes and on a tip of the pliable neck (85) is a head of the safety latch (82); wherein a function of the head of the safety latch (82) is to insert in the front anchoring slot (53) to conform a charge state of the EDCBSCSS and also the head of the safety latch (82) is inserted into a rear anchoring slot in order to activate the collection and safety systems of the EDCBSCSS.

11. The Extraction Device for Collecting Blood Samples, including the Catheter and a the Safety System EDCBSCSS, as described in claim 3 wherein, the safety latch (8) comprises of a rectangular base (88) with two slide guides (83) in the lower part located on each side of the rectangular base (88) the two slide guides (83) along with housing guides (41) control the direction of the displacement of the safety latch (8); on a top part of the rectangular base (88), a pliable neck (85) protrudes and on a tip of the pliable neck (85) is a head of the safety latch (82); wherein a function of the head of the safety latch (82) is to insert in the front anchoring slot (53) to conform a charge state of the EDCBSCSS and also the head of the safety latch (82) is inserted into a rear anchoring slot in order to activate the collection and safety systems of the EDCBSCSS.

12. The Extraction Device for Collecting Blood Samples, including the Catheter and a the Safety System EDCBSCSS, as described in claim 4 wherein, the safety latch (8) comprises of a rectangular base (88) with two slide guides (83) in the lower part located on each side of the rectangular base (88) the two slide guides (83) along with housing guides (41) control the direction of the displacement of the safety latch (8); on a top part of the rectangular base (88), a pliable neck (85) protrudes and on a tip of the pliable neck (85) is a head of the safety latch (82); wherein a function of the head of the safety latch (82) is to insert in the front anchoring slot (53) to conform a charge state of the EDCBSCSS and also the head of the safety latch (82) is inserted into a rear anchoring slot in order to activate the collection and safety systems of the EDCBSCSS.

13. The Extraction Device for Collecting Blood Samples, including the Catheter and a the Safety System EDCBSCSS, as described in claim 2 wherein, the catheter space (3), the catheter housings (4) and (5), the cap space (6) and the cap (7) all joined together to form a single body.

15. The Extraction Device for Collecting Blood Samples, including the Catheter and a the Safety System EDCBSCSS, as described in claim 3 wherein, the catheter space (3), the catheter housings (4) and (5), the cap space (6) and the cap (7) all joined together to form a single body.

16. The Extraction Device for Collecting Blood Samples, including the Catheter and a the Safety System EDCBSCSS, as described in claim 4 wherein, the catheter space (3), the catheter housings (4) and (5), the cap space (6) and the cap (7) all joined together to form a single body.

17. The Extraction Device for Collecting Blood Samples, including the Catheter and a the Safety System EDCBSCSS, as described in claim 1, wherein said catheter is a flexible plastic catheter.

18. The Extraction Device for Collecting Blood Samples, including the Catheter and the Safety System EDCBSCSS, as described in claim 1, wherein said catheter is a flexible plastic catheter. the Safety System EDCBSCSS, as described in claim 2 above, wherein the cap space (6) which is joined to the components, the cap (7), the extraction cannula (10) and a tube holder (13) form the collecting system of the EDCBSCSS.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 shows an isometric view of the Extraction Device for Collecting Blood Samples including a Catheter and Safety System, from here on out called EDCBSCSS.

[0021] FIG. 2 is an exploded drawing showing the parts that make up the EDCBSCSS.

[0022] FIG. 3 shows the details of the protective tube and primary housing of the EDCBSCSS.

[0023] FIG. 4 shows a top and side view of the EDCBSCSS and the way in which the front protective tube is connected.

[0024] FIG. 5 shows an isometric image of the EDCBSCSS connected to the tube holder and the way the front protective tube is uncoupled.

[0025] FIG. 6 shows an isometric image of the EDCBSCSS, with the cannula retracted, and the retracting system of the puncturing cannula is shown in detail.

[0026] FIG. 7 shows a lateral cut A-A in which details of EDCBSCSS in a charged state are shown.

[0027] FIG. 8 shows a lateral cut A-A in which details of the EDCBSCSS in retraction and collecting of blood are shown.

[0028] FIG. 9 shows an isometric image of the space of the cap.

[0029] FIG. 10 shows an isometric image of the safety latch of the cannula holder.

[0030] FIG. 11 shows an isometric image of the set of safely latches of the cannula in their final configuration.

DETAILED DESCRIPTION OF THE INVENTION

[0031] For the detailed description we will refer to the figures of the preferred version of the present invention.

[0032] An isometric view of the Extraction device for collecting blood samples including a catheter and a safety system is shown in FIG. 1. The catheter (2) surrounds the puncturing cannula (1). The catheter (2) is connected to the catheter space (3) and this in turn is connected to the housing components (5) and (4). The puncturing cannula is connected to the safety latch (8) which is within the housings (5) and (4). At the opposite end of the catheter space (3) the cap space (6) is connected. This is connected to the cap (7). A spring (9) can be found between the safely latch (8) and the puncturing cannula space (1) and this pushes the safety latch (8) once it is free, in order to retrieve the puncturing cannula (1) and this houses the extraction cannula (10) within the cap and through the cap space. The group of catheter space (3), cap space (6) and housing components (5) and (4) form a single unit when assembled.

[0033] The EDCBSCSS consists of 10 elements as shown in the exploded view in FIG. 2. As may be seen in this FIG. 2, the parts which make up the EDCBSCSS are: (1) puncturing cannula; (2) catheter; (3) catheter space; (4) top housing; (5) bottom housing; (6) cap space; (7) cap; (8) cannula port safety latch; (9) spring and (10) collecting cannula.

[0034] For transporting, the EDCBSCSS is housed in the protective tubes (11) and (12) shown in FIG. 3, whose function is to protect the EDCBSCSS during moving and prevent any contact at all with the needle before the EDCBSCSS is used. It is also equipped with the design characteristics necessary for sterilization. When the protective tube (12) is removed, part of the housings (4) and (5), the cap space (6) and the cap (7) are exposed, and only the front protecting tube (11) remains in place, covering the catheter (2), puncturing cannula (1) and the catheter space (3), as show in FIG. 4. In this way the device is ready to be connected to the tube holder (13) and the EDCBSCSS is now ready for the puncturing and blood extraction procedure, as shown in FIG. 5. In FIG. 4 we can see details of the front protecting tube (11). These details ease the use of EDCBSCSS. The front protecting tube (11) present an indicator in the shape of an arrow (111) which lets the user know the direction and position of the tip of the puncturing cannula (1). Also, the front protecting tube has two wings (113) which connect to the rear protecting tube, leaving the handling curvatures (51) free, making it unnecessary to remove the front protecting tube until the procedure begins.

[0035] The detail of the EDCBSCSS in the charge state is shown in FIG. 6. The puncturing cannulas (1) and the collecting cannula (10) are linked to the safety latch (8) which is fixed inside the housings (4) and (5). This safety latch (8) is pushed by the spring (9) located between the safety latch (8) and the catheter space (3). In this charge state the puncturing cannula (1) is within the flexible catheter (2), while the collecting cannula is outside the rubber cap (7) but inside the pivot guide (63) of the cap space (6). In this position the EDCBSCSS is ready for the puncturing procedure and the placing of the catheter (2) in order to proceed with extracting the blood. Once the catheter (2) is in the vein, the retraction mechanism of the puncturing cannula (1) is activated and the collection cannula is ready for collecting the blood sample.

[0036] FIG. 8 shows the details of the EDCBSCSS in the retraction and blood collecting state. Once the puncturing has taken place and the catheter (2) and puncturing cannula (1) are in the patient's vein, the retraction mechanism of the EDCBSCSS may be activated. This is done by pushing the top housing (5) towards the head of the safety latch (82) which due to its geometric conditions will flex the neck of the safety latch (85) and disconnect the housing (5). At the same time it will be shifted due to the decompression of the spring (9). The safety latch (8) will shift within the housings (4) and (5) guided by the housing guides (41) until it connects by way of the safety latch head (82) with the rear anchoring slot (52), remaining fixed in this position. The puncturing cannula (1), upon being attached to the safety latch (8) will move together with it, so that only the catheter (2) remains inside the vein while the collecting cannula (7) joined to the safety latch (8) will slide inside the cap (7), habilitating the system for collecting blood. In the configuration the extraction of blood of the EDCBSCSS forms a flow channel made up of the catheter (2), puncturing cannula (1), safety latch flow channel (81) and extraction cannula (10). This channel presents the optimal geometric conditions for easy and efficient extraction of blood once the vacuum tube is connected to the extraction cannula (10).

[0037] FIG. 9 shows an isometric image of the cap space (6), which connects to the components, cap (7), the collecting cannula (10) and the tube holder (13) which makes up the collection system of the flow channel of the EDCBSCSS. The cap space (6) has standard threads (61) which are used to attach commercial tube holders for extracting blood samples, and also a hollow pivot on the cap (62) which is used to connect the cap (7), and on the opposite side there is a hollow pivot guide for the collecting cannula (63) in which the collecting cannula (10) is stored and guided when the system for retracting the puncturing cannula (1) is retracted. The cap space is joined to the housings (4) and (5) in such a way as to form a single body.

[0038] FIGS. 10 and 11 show details of the system for retracting the puncturing cannula of the flow channel of the EDCBSCSS. The safety latch (8) consists of a rectangular base (88) with two slide guides (83) in the lower part located on each side of the rectangular base (88). These guides along with the housing guides (41) control the direction of the displacement of the safety latch (8). On the top part of the rectangular base (88) a pliable neck (85) protrudes on whose tip is the head of the safety latch (82) whose function is to insert in the front anchoring slot (53) to conform the charge state of the EDCBSCSS. Once the reaction system is activated, the head of the safety latch (82) is inserted into the rear anchoring slit in order to activate the collection and safety system of the EDCBSCSS. On the front of the safety latch (8) a puncturing cannula pivot protrudes (84) and this supports and anchors the puncturing cannula (1) and acts as a guide for placing the spring (9). This pivot is hollow and constitutes a safety latch flow channel (81) which connects the puncturing cannula (1) to the collecting cannula (10) and together with the catheter (2) constitute the flow channel for extracting and collecting the blood sample towards the vacuum tube collector.

REFERENCES

[0039] [1] Lavery I, Ingram P. Blood sampling: best practice. Nursing Standard, 2005, 19: 55 65.

[0040] [2] Berkeris L et al. Trends in blood culture contamination. A College of American Pathologist Q-tracks study of 356 institutions. Archives of Pathology and Laboratory Medicine, 2005, 123: 1222-1226.

[0041] [3] McCALL, R. E.; TANKERSLEY, C. M. Phlebotomy Essentials. Philadelphia, Lippincott Williams & Wilkins, 3rd ed., 2003.

[0042] The invention has been described sufficiently so that a person with knowledge in the field may reproduce and obtain the results, which we mention in the present invention. However, anyone skilled in the art of the present invention may be capable of making modifications not described in the present application. If for the application of these modifications in a determined structure or in the process of manufacturing, the matter claimed in the following claims is required, said structures are considered within the scope of the invention.