Transfer device for positive sample of blood culture bottle

Abstract

The invention relates to the field of biological devices, in particular to a blood culture bottle positive sample transfer device which comprises a connecting pipe and at least two puncture needles, the puncture needles are communicated with an opening of the connecting pipe, a protective cover is arranged on the outer wall of the connecting pipe, and the protective cover is arranged on the outer wall of the connecting pipe. And the puncture needle close to the protective cover is arranged in the protective cover. A connecting seat is arranged at one end of the connecting tube, the protective cover is arranged on the outer wall of the connecting seat, and the puncture needle is communicated with the connecting tube through the connecting seat. And the protective cover is in threaded connection with the connecting seat. The device has the advantages that the blood sample in the culture bottle can be conveniently transferred, and pollution and biological hazards to the blood sample are avoided as much as possible.

Description

Technical Field

[0001] The invention relates to the field of biological devices, in particular to a transfer device for positive samples of blood culture bottles. Background Art

[0002] After the blood culture instrument completes the cultivation of bacteria in the blood sample, it will automatically detect the positive and negative of the blood, screen the positive culture bottles and negative culture bottles, extract the blood samples in the positive culture bottles, and transfer them to the vacuum blood collection bottles.

[0003] At present, a syringe is generally used to insert a needle into a culture bottle, and a blood sample is drawn from the culture bottle. Then, after the syringe needle is pulled out of the culture bottle, it is inserted into a vacuum blood collection bottle, and the blood sample is injected into the vacuum blood collection bottle. However, this method requires the syringe to be inserted and pulled out back and forth, which is cumbersome to operate. In addition, during the process of inserting and pulling out the syringe, the needle is difficult to be pulled out from the rubber stopper of the vacuum blood collection bottle or the culture bottle, which causes external gas to enter the culture bottle and the vacuum blood collection bottle, and there is a risk of contaminating the blood sample. Summary of the invention

[0004] In order to facilitate the transfer of blood samples in culture bottles and avoid contamination of the blood samples as much as possible, the present invention provides a transfer device for positive samples in blood culture bottles.

[0005] The present invention provides a device for transferring positive samples from a blood culture bottle, which adopts the following technical solution:

[0006] A transfer device for positive samples in a blood culture bottle comprises a connecting tube and a puncture needle. The puncture needle is provided with at least two needles and is connected to an opening of the connecting tube. A protective cover is provided on the outer wall of the connecting tube, and the puncture needle close to the protective cover is arranged in the protective cover.

[0007] In a specific possible implementation mode, a connection seat is provided at one end of the connection tube, the protective cover is arranged on the outer wall of the connection seat, and the puncture needle close to the protective cover is connected to the connection tube through the connection seat.

[0008] In a specific embodiment, a guide cover is provided on the outer wall of the puncture needle connected to the end of the connecting tube away from the protective cover.

[0009] In a specific possible implementation manner, the protective cover is detachably connected to the connecting seat.

[0010] In a specific embodiment, the depth of the protective cover is greater than the length of the puncture needle.

[0011] In a specific possible implementation scheme, a blocking ring is provided on the inner wall of the connecting tube, a branch tube is provided on the connecting tube, one end of the branch tube is connected to the connecting tube, and the other end is closed, the end of the branch tube connected to the connecting tube is close to the end of the connecting tube connected to the culture bottle, a ball is provided in the branch tube, the diameter of the ball is larger than the inner diameter of the blocking ring, and the end of the branch tube connected to the connecting tube is provided with an expansion ring, the inner diameter of the expansion ring is smaller than the diameter of the ball.

[0012] In a specific possible implementation scheme, a limiting ring is provided in the branch pipe, and the limiting ring is arranged on a side of the ball away from the expansion ring, and the inner diameter of the limiting ring is smaller than the inner diameter of the expansion ring.

[0013] In a specific possible implementation scheme, a support portion is provided on the outer wall of the protective cover;

[0014] The support portion is in the shape of a hollow truncated cone with a diameter gradually increasing in a direction away from the protective cover.

[0015] In a specific possible implementation manner, the support portion is disposed on a side of the protective cover facing away from the puncture needle, so that when the support portion is placed on a horizontal plane, the opening of the puncture needle in the protective cover is disposed upward.

[0016] In a specific possible implementation manner, the support portion has a clearance opening for allowing the connecting tube to pass through the support portion.

[0017] In a specific possible implementation manner, a fixing block is provided on the inner wall of the support portion, the fixing block is arranged on a side of the support portion close to the yield opening, and a clamping block is provided on the side wall of the fixing block.

[0018] In a specific implementation scheme, a blocking cover is provided on the outer wall of the puncture needle connected to the end of the connecting tube away from the protective cover, and the blocking cover is provided with a through hole for the puncture needle to pass through, and the diameter of the through hole is smaller than the diameter of the rubber stopper of the vacuum blood collection bottle.

[0019] The present invention also provides a device for transferring positive samples from a blood culture bottle, which adopts the following technical solution:

[0020] A device for transferring positive samples of a blood culture bottle comprises a connecting seat and a puncture needle. The puncture needle is connected to the connecting seat and the puncture needle penetrates the connecting seat at one end connected to the connecting seat.

[0021] In a specific possible implementation mode, a protective cover is provided on the connecting seat, and one end of the puncture needle is arranged in the protective cover.

[0022] In a specific possible implementation scheme, a guide cover is provided on the connecting seat, and the end of the puncture needle away from the protective cover is arranged in the guide cover.

[0023] In a specific possible implementation manner, the guide cover is arranged at an end of the connecting base away from the protective cover.

[0024] The present invention also provides a device for transferring positive samples from a blood culture bottle, which adopts the following technical solution:

[0025] A device for transferring positive samples from a blood culture bottle comprises a connecting seat and at least two puncture needles, one of the puncture needles is connected to the connecting seat, and the other puncture needle is also connected to the connecting seat, and the connecting seat connects the puncture needles.

[0026] In a specific possible implementation mode, a protective cover is provided on the connecting seat, and one of the puncture needles is arranged in the protective cover.

[0027] In a specific possible implementation mode, a guide cover is provided on the connecting seat, and a puncture needle is arranged in the guide cover.

[0028] In a specific possible implementation manner, the guide cover is arranged at an end of the connecting base away from the protective cover.

[0029] In a specific embodiment, a sealing sleeve is provided on the puncture needle.

[0030] In summary, the present invention includes at least one of the following beneficial technical effects:

[0031] 1. One puncture needle is connected to the culture bottle, and the other puncture needle is connected to the vacuum blood collection tube. The two puncture needles are connected through a connecting tube, so that after the culture bottle is turned upside down, the blood in the culture bottle can be transferred to the vacuum blood collection tube. After collecting enough blood samples in the vacuum blood collection tube, the puncture needle is pulled out of the vacuum blood collection tube and the culture bottle to complete the transfer of the blood sample. This eliminates the process of manually drawing blood samples with a syringe and transferring them, reduces the contact between blood samples and air, and reduces the risk of blood samples being contaminated. And you only need to pull out the puncture needle from the vacuum blood collection tube, and you can use your fingers to hold the rubber plug of the vacuum blood collection tube tightly, which avoids the situation where the rubber plug is pulled out of the vacuum blood collection tube when the puncture needle is pulled out of the rubber plug.

[0032] 2. By providing a support portion, the inverted culture bottle can be supported by the support portion, making it easy to insert another puncture needle into the vacuum blood bottle, thereby facilitating the transfer of blood samples.

[0033] 3. After collecting enough blood samples in the vacuum blood collection tube, squeeze the branch tube so that the ball passes through the expansion ring under the action of air pressure and enters the connecting tube. The blocking ring blocks the ball from rolling toward the vacuum blood collection tube. At the same time, due to the pressure of the blood, the ball is pressed against the side wall of the blocking ring, and the opening of the blocking ring is closed, so that the blood cannot continue to flow into the vacuum blood collection tube. It is no longer necessary to manually pinch the connecting tube to block the blood from flowing into the vacuum blood collection tube, which makes it more convenient to pull out the puncture needle from the vacuum blood collection tube.

[0034] 4. The connection seat and the puncture needle connect the vacuum blood collection tube and the culture bottle, eliminating the need for a connecting tube. By inverting the culture bottle, the start and stop of the transfer of the blood sample can be conveniently controlled.

[0035] 5. The setting of the sealing sleeve prevents the gas in the culture bottle from escaping after the puncture needle is connected to the culture bottle, effectively avoiding the splashing of droplets. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of Example 1.

[0037] Figure 2 It is a cross-sectional view showing the internal structure of the protective cover.

[0038] Figure 3 It is a cross-sectional view showing the internal structure of the guide cover.

[0039] Figure 4 It is a schematic diagram of the overall structure after Example 2 is connected with a vacuum blood collection tube.

[0040] Figure 5 It is a schematic diagram showing the internal structure of the support part.

[0041] Figure 6 It is a cross-sectional view showing the internal structure of the branch pipe.

[0042] Figure 7 It is a schematic diagram of the overall structure of Example 3.

[0043] Figure 8 It is a cross-sectional view showing the internal structure of the protective cover in Example 3.

[0044] Explanation of the reference numerals: 1. connecting tube; 2. first puncture needle; 3. second puncture needle; 4. connecting seat; 5. protective cover; 6. sliding seat; 7. clamp; 8. baffle; 9. supporting portion; 10. clearance port; 11. fixing block; 12. clamping block; 13. blocking cover; 14. through hole; 15. branch tube; 16. blocking ring; 17. expansion ring; 18. ball; 19. limiting ring; 20. guide cover; 21. sealing sleeve. DETAILED DESCRIPTION

[0045] The following is combined with Figure 1-8 The present invention is described in further detail.

[0046] Embodiment 1:

[0047] Reference Figure 1 and Figure 2 The transfer device for positive samples in a blood culture bottle includes a connecting tube 1 and a puncture needle. Two puncture needles are provided, and the two puncture needles are respectively arranged at the two ends of the connecting tube 1. For the convenience of description, the first puncture needle 2 and the second puncture needle 3 are used to distinguish. One end of the connecting tube 1 is detachably connected to a connecting seat 4. The first puncture needle 2 is fixed to the end of the connecting seat 4 away from the connecting tube 1, and the second connecting tube 1 is connected to the other end of the connecting tube 1. The first puncture needle 2 is used to be inserted into the rubber stopper of the culture bottle. Through the grabbing connection, it is convenient to apply a thrust to the first puncture needle 2 through the connecting seat 4, so as to facilitate the first puncture needle 2 to be inserted into the culture bottle. The second puncture needle 3 is inserted into the vacuum blood collection tube. Since the vacuum blood collection tube is under negative pressure and the culture bottle is under positive pressure, the culture bottle is inverted, and the positive blood sample in the culture bottle will flow into the vacuum blood collection tube through the connecting tube 1. After enough blood sample is obtained in the vacuum blood collection tube, the connecting tube 1 is squeezed to stop the blood sample from flowing into the vacuum blood collection tube, and the culture bottle is reset. At this time, the first puncture needle 2 is removed from the culture bottle, and the second puncture needle 3 is removed from the vacuum blood collection tube.

[0048] Reference Figure 1 and Figure 2 A baffle 8 is fixed on the side wall of the second puncture needle 3. By grabbing the baffle 8, it is convenient to apply pushing and pulling forces to the second puncture needle 3, so as to facilitate inserting the second puncture needle 3 into the rubber stopper of the vacuum blood collection bottle, or pulling the second puncture needle 3 out of the rubber stopper of the vacuum blood collection bottle.

[0049] In order to improve the stability of the first puncture needle 2 when inserted into the culture bottle stopper, the connecting seat 4 is made of medical hard plastic, that is, the connecting seat 4 is not easy to elastically deform or plastically deform under the action of external force. In order to facilitate the control of the connection and blockage of the connecting tube 1, the connecting tube 1 is made of medical soft plastic, that is, the connecting tube 1 can be elastically deformed under the squeeze of fingers.

[0050] Reference Figure 1 and Figure 2 A protective cover 5 is threadedly connected to the outer wall of the connecting seat 4, and the first puncture needle 2 is arranged in the protective cover 5. The depth of the protective cover 5 is greater than the length of the first puncture needle 2, which can not only prevent the first puncture needle 2 from piercing the staff, but also prevent external pollutants from contacting the puncture needle, thereby reducing the possibility of contamination of the first puncture needle 2. At the same time, since there is positive pressure in the culture bottle, when the first puncture needle 2 is inserted into the rubber stopper of the culture bottle, there is a situation where the blood coagulation sample in the culture bottle splashes. The protective cover 5 can block the splashed blood sample in the protective cover 5 to prevent the blood sample from contaminating the surrounding environment.

[0051] Reference Figure 1 and Figure 2 , the connecting tube 1 is provided with a sliding seat 6, the sliding seat 6 can slide along the connecting tube 1, and the sliding seat 6 is provided with a clamp 7, and the clamp 7 can rotate relative to the sliding seat 6. It can be understood that the outside air entering the culture bottle may contaminate the blood sample in the culture bottle, and the outside air entering the vacuum blood collection tube may contaminate the vacuum blood collection tube or the blood sample in the vacuum blood collection tube. Conversely, the blood sample in the culture bottle or the vacuum blood collection tube entering the outside air may contaminate the external environment, causing mutual contamination. Therefore, before collecting the blood sample, the clamp 7 is clamped on the connecting tube 1, and the connecting tube 1 undergoes elastic deformation at this time and is in a blocked state, which can reduce the contact between the culture bottle, the vacuum blood collection tube and the external environment and avoid mutual contamination. After the first puncture needle 2 is connected with the culture bottle and the second puncture needle 3 is connected with the vacuum blood collection tube, the clamp 7 is squeezed and rotated, so that the connecting tube 1 loses the clamping effect of the clamp 7, and the connecting tube 1 is restored to be connected, and the blood sample can enter the vacuum blood collection tube. After collecting enough blood samples in the vacuum blood collection tube, the clamp 7 is clamped on the connecting tube 1 again, and the connecting tube 1 is blocked again, which is convenient for taking out the first puncture needle 2 from the culture bottle and the second puncture needle 3 from the vacuum blood collection tube, and can also reduce the air exchange between the outside and the culture bottle and the vacuum blood collection tube to avoid contamination. The position of the clamp 7 can be adjusted by sliding the sliding seat 6.

[0052] Reference Figure 3 In some other embodiments, the baffle 8 on the second puncture needle 3 can be removed, and the guide cover 20 can be fixed on the second puncture needle 3. When the second puncture needle 20 is inserted into the vacuum blood collection tube, the guide cover 20 is first sleeved on the vacuum blood collection tube to guide the insertion direction of the second puncture needle 3, so as to facilitate the second puncture needle 3 to be inserted into the vacuum blood collection tube quickly and accurately.

[0053] The implementation principle of Example 1 of the present invention is as follows: select a suitable protective cover 5 to connect with the connecting seat 4, clamp the clamp 7 on the connecting tube 1, the connecting tube 1 is in a blocked state, insert the first puncture needle 2 into the rubber stopper of the culture bottle, and insert the second puncture needle 3 into the vacuum blood collection tube. Invert the culture bottle and loosen the clamp 7. At this time, the culture bottle is connected to the vacuum blood collection tube, and the blood sample enters the vacuum blood collection tube to collect the blood sample. After collecting enough blood samples in the vacuum blood collection tube, clamp the connecting tube 1 again with the clamp 7. At this time, the connection between the vacuum blood collection tube and the culture bottle is disconnected. After the culture bottle is reset, remove the first puncture needle 2 from the culture bottle, remove the second puncture needle 3 from the vacuum blood collection tube, and complete the transfer of the blood sample.

[0054] Embodiment 2:

[0055] Reference Figure 4 and Figure 5 , the difference between Example 2 and Example 1 is that: a support portion 9 is fixed to one end of the protective cover 5 facing the connecting seat 4, and the support portion 9 is in the shape of a hollow truncated cone as a whole, and the diameter of the support portion 9 gradually increases in the direction away from the protective cover 5. A clearance opening 10 is provided at the top of the support portion 9, so that the connecting tube 1 can pass through the support portion 9. During the blood sample transfer process, in order to invert the culture bottle, the staff generally holds the culture bottle and inverts the culture bottle. When the staff needs to stop the transfer of the blood sample, they can only use one hand to operate the clamp 7 to clamp the connecting tube 1, which is inconvenient. By reversing the positions of the protective cover 5 and the support portion 9, the original protective cover 5 is at the bottom and the support portion 9 is at the top, and the reverse is that the support portion 9 is at the bottom and the protective cover 5 is at the top, and the culture bottle is inverted at this time. Further, relying on the truncated cone structure of the support portion 9, the support stability of the support portion 9 on the culture bottle can be improved. The connecting tube 1 can pass through the support portion 9 through the clearance opening 10. The support of the support part 9 allows the staff to operate the clamp 7 with both hands without holding the culture bottle.

[0056] Reference Figure 4 and Figure 5 A fixing block 11 is fixed on the inner wall of the support part 9. The fixing block 11 is arranged on one side of the support part 9 close to the clearance opening 10. A clamping block 12 is fixed on the side wall of the fixing block 11. There is a gap between the clamping block 12 and the inner wall of the support part 9. The connecting tube 1 can be clamped in the gap between the clamping block 12 and the inner wall of the support part 9, thereby improving the stability of the connecting tube 1 in the support part 9. In the process of inverting the culture bottle, the connecting tube 1 is not easy to rotate or swing in the support part 9 under the clamping action of the clamping block 12, so that the connecting tube 1 can be stably clamped in the clearance opening 10, eliminating the process of manually adjusting the position of the connecting tube 1, and making the transfer of blood samples more convenient.

[0057] Reference Figure 4 The transfer device for positive samples of the blood culture bottle also includes a blocking cover 13, which is arranged at one end of the connecting tube 1 away from the protective cover 5. Before the second puncture needle 3 is inserted into the vacuum blood collection bottle, the blocking cover 13 is sleeved on the vacuum blood collection tube. A through hole 14 is provided on the blocking cover 13, and the diameter of the through hole 14 is smaller than the diameter of the rubber plug of the vacuum blood collection tube and larger than the diameter of the second puncture needle 3. The second puncture needle 3 is inserted into the rubber plug of the vacuum blood collection tube through the through hole 14 and is connected with the vacuum blood collection tube. When the second puncture needle 3 needs to be pulled out, the blocking piece 8 is grasped with one hand, and the blocking cover 13 and the vacuum blood collection tube are grasped with the other hand, so that the second puncture needle 3 can be easily pulled out from the vacuum blood collection tube. At the same time, due to the blocking effect of the blocking cover 13, the rubber plug of the vacuum blood collection tube cannot be pulled out downward under the drive of the second puncture needle 3, thereby avoiding the situation that the blood sample in the vacuum blood collection tube is contaminated when the second puncture needle 3 is pulled out.

[0058] Reference Figure 4 and Figure 6 , the difference between Example 2 and Example 1 is that the sliding seat 6 and the clamp 7 may no longer be provided on the connecting tube 1. The connecting tube 1 is connected with a branch tube 15, and the end of the branch tube 15 away from the connecting tube 1 is in a closed state. An expansion ring 17 is fixed on the inner wall of the end of the branch tube 15 close to the connecting tube 1, and a ball 18 is provided on the side of the expansion ring 17 facing the inside of the branch tube 15, and a limiting ring 19 is provided on the side of the ball 18 away from the expansion ring 17. The limiting ring 19 is fixed on the inner wall of the branch tube 15, and the inner diameter of the limiting ring 19 is less than the inner diameter of the expansion ring 17 and less than the diameter of the ball 18, and the limiting ring 19 and the expansion ring 17 are both in close contact with the circumferential surface of the ball 18. A blocking ring 16 is fixed in the connecting tube 1, and the inner diameter of the blocking ring 16 is smaller than the diameter of the ball 18. The blocking ring 16 is longer than the branch tube 15 from the connecting seat 4.

[0059] When the transfer of the blood sample needs to be stopped, the branch tube 15 is squeezed to increase the air pressure in the branch tube 15, thereby prompting the ball 18 to enter the connecting tube 1 under the action of the air pressure. The pushing action of the blood causes the ball 18 to move toward the blocking ring 16, and the ball 18 abuts against the blocking ring 16 and closes the blocking ring 16, thereby preventing the blood sample from further flowing into the vacuum blood collection tube, making it easier for the staff to perform subsequent operations.

[0060] The implementation principle of Example 2 of the present invention is: connect the first puncture needle 2 to the culture bottle, put the first blocking cover 13 on the vacuum blood collection bottle, and connect the second puncture needle 3 to the vacuum blood collection bottle. Invert the culture bottle and the support part 9, support the culture bottle by the support part 9, and place the support part 9 on a carrier such as a desktop. After completing the collection of the blood sample in the vacuum blood collection bottle, squeeze the branch tube 15 so that the ball 18 enters the connecting tube 1 to block the connecting tube 1. Reset the culture bottle and remove the first puncture needle 2 from the culture bottle. Hold the blocking cover 13 with one hand and the baffle 8 with the other hand to pull the second puncture needle 3 out of the vacuum blood collection bottle.

[0061] Embodiment 3:

[0062] Reference Figure 7 and Figure 8The difference between Example 3 and Example 1 is that the connecting tube 1 is omitted in Example 3, and the first puncture needle 2 and the second puncture needle 3 are respectively arranged at opposite ends of the connecting seat 4, and the first puncture needle 2 and the second puncture needle 3 are connected at one end in the connecting seat 4. The connecting seat 4 is provided with a protective cover 5 at one end of the first puncture needle 2, and the protective cover 5 is threadedly connected to the connecting seat 4; the connecting seat 4 is provided with a guide cover 20 at one end of the second puncture needle 3, and the guide cover 20 is threadedly connected to the connecting seat 4, and the openings of the protective cover 5 and the guide cover 20 face oppositely. The first puncture needle 2 and the second puncture needle 3 are both covered with a sealing sleeve 21, and the sealing sleeve 21 seals the openings of the first puncture needle 2 and the second puncture needle 3 to prevent dust and the like from entering the first puncture needle 2 and the second puncture needle 3.

[0063] The implementation principle of Example 3 of the present invention is as follows: the protective cover 5 is sleeved on the culture bottle, the connecting seat 4 is pressed, and the first puncture needle 2 first punctures the sealing sleeve 21, passes through the sealing sleeve 21, and then punctures the rubber plug of the culture bottle. The positive pressure in the culture bottle causes the gas in the culture bottle to flow toward the second puncture needle 3. The sealing sleeve 21 seals the opening of the second puncture needle 3, so that the gas in the culture bottle cannot escape from the second puncture needle 3, and the droplets of the blood sample in the culture bottle are blocked from splashing with the flow of gas. The vacuum blood collection tube is inserted into the guide sleeve. During the insertion of the vacuum blood collection tube, the guide sleeve guides the insertion of the vacuum blood collection tube. When the rubber plug of the vacuum blood collection tube contacts the sealing sleeve 21, as the vacuum blood collection tube moves further, the sealing sleeve 21 contacts the tip of the second puncture needle 3, and the second puncture needle 3 punctures the sealing sleeve 21 and further punctures the rubber plug of the vacuum blood collection tube. At this time, the culture product is connected with the vacuum blood collection tube. By inverting the culture bottle, the blood sample can be transferred to the vacuum blood collection tube. Inverting the bottle again stops the transfer of blood sample into the vacutainer.

[0064] It is easy to understand that in some other embodiments, the first puncture needle 2 and the second puncture needle 3 can use the same puncture needle, that is, the puncture needle passes through the connecting seat 4, and the two ends of the puncture needle extend into the protective cover 5 and the guide cover 20 respectively. In addition, the first puncture needle 2 and the second puncture needle 3 do not have to be arranged oppositely, that is, the orientation of the protective cover 5 and the guide cover 20 does not have to be arranged oppositely, and the first puncture needle 2 and the second puncture needle 3 can be connected so that the culture bottle and the vacuum blood collection tube are connected. It is conceivable that the protective cover 5 and the guide cover 20 can be selected and used according to actual conditions, that is, according to actual conditions, only the protective cover 5 or the guide cover 20 can be set on the connecting seat 4.

[0065] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for transferring positive samples from blood culture bottles, characterized in that: It comprises a connecting tube (1) and a puncture needle, wherein at least two puncture needles are provided, the puncture needles are connected to the opening of the connecting tube (1), a protective cover (5) is provided on the outer wall of the connecting tube (1), and the puncture needle close to the protective cover (5) is arranged in the protective cover (5).

2. The blood culture bottle positive sample transfer device according to claim 1, characterized in that: A connecting seat (4) is provided at one end of the connecting tube (1), the protective cover (5) is arranged on the outer wall of the connecting seat (4), and the puncture needle close to the protective cover (5) is connected to the connecting tube (1) through the connecting seat (4).

3. The blood culture bottle positive sample transfer device according to claim 1, characterized in that: A guide cover (20) is provided on the outer wall of the puncture needle connected to the end of the connecting tube (1) away from the protective cover (5).

4. The blood culture bottle positive sample transfer device according to claim 2, characterized in that: The protective cover (5) is detachably connected to the connecting seat (4).

5. The blood culture bottle positive sample transfer device according to claim 1, characterized in that: The depth of the protective cover (5) is greater than the length of the puncture needle.

6. The blood culture bottle positive sample transfer device according to claim 1, characterized in that: A blocking ring (16) is provided on the inner wall of the connecting tube (1), and a branch tube (15) is provided on the connecting tube (1). One end of the branch tube (15) is connected to the connecting tube (1) and the other end is closed. The end of the branch tube (15) connected to the connecting tube (1) is close to the end of the connecting tube (1) connected to the culture bottle. A ball (18) is provided in the branch tube (15), and the diameter of the ball (18) is larger than the inner diameter of the blocking ring (16). An expansion ring (17) is provided at the end of the branch tube (15) connected to the connecting tube (1), and the inner diameter of the expansion ring (17) is smaller than the diameter of the ball (18).

7. The device for transferring positive samples from blood culture bottles according to claim 6, characterized in that: A limiting ring (19) is provided in the branch pipe (15), and the limiting ring (19) is arranged on a side of the ball (18) away from the expansion ring (17), and the inner diameter of the limiting ring (19) is smaller than the inner diameter of the expansion ring (17).

8. The blood culture bottle positive sample transfer device according to claim 1, characterized in that: A support portion (9) is provided on the outer wall of the protective cover (5); the support portion (9) is in the shape of a hollow truncated cone with a diameter gradually increasing in a direction away from the protective cover (5).

9. The blood culture bottle positive sample transfer device according to claim 8, characterized in that: The support portion (9) is arranged on a side of the protective cover (5) facing away from the puncture needle, so that when the support portion (9) is placed on a horizontal plane, the opening of the puncture needle in the protective cover (5) is arranged upward.

10. The blood culture bottle positive sample transfer device according to claim 8, characterized in that: The support portion (9) has a clearance opening (10) for the connecting pipe (1) to pass through the support portion (9).

11. The blood culture bottle positive sample transfer device according to claim 10, characterized in that: A fixing block (11) is provided on the inner wall of the support portion (9), and the fixing block (11) is arranged on a side of the support portion (9) close to the clearance opening (10), and a clamping block (12) is provided on the side wall of the fixing block (11).

12. The blood culture bottle positive sample transfer device according to claim 1, characterized in that: A blocking cover (13) is provided on the outer wall of the puncture needle connected to the end of the connecting tube (1) away from the protective cover (5), and a through hole (14) is provided on the blocking cover (13) for the puncture needle to pass through, and the diameter of the through hole (14) is smaller than the diameter of the rubber stopper of the vacuum blood collection bottle.

13. A device for transferring positive samples from blood culture bottles, characterized in that: It comprises a connecting seat (4) and a puncture needle, wherein the puncture needle is connected to the connecting seat (4), and the puncture needle penetrates from the connecting seat (4) at one end connected to the connecting seat (4).

14. The blood culture bottle positive sample transfer device according to claim 13, characterized in that: The connecting seat (4) is provided with a protective cover (5), and one end of the puncture needle is arranged in the protective cover (5).

15. The blood culture bottle positive sample transfer device according to claim 14, characterized in that: The connecting seat (4) is provided with a guide cover (20), and the end of the puncture needle away from the protective cover (5) is arranged in the guide cover (20).

16. The blood culture bottle positive sample transfer device according to claim 15, characterized in that: The guide cover (20) is arranged at an end of the connecting seat (4) away from the protective cover (5).

17. A device for transferring positive samples from blood culture bottles, characterized in that: It comprises a connecting seat (4) and at least two puncture needles, one of the puncture needles is connected to the connecting seat (4), and the other puncture needle is also connected to the connecting seat (4), and the connecting seat (4) connects the puncture needles.

18. The blood culture bottle positive sample transfer device according to claim 17, characterized in that: The connecting seat (4) is provided with a protective cover (5), and a puncture needle is arranged in the protective cover (5).

19. The device for transferring positive samples from blood culture bottles according to claim 18, characterized in that: The connecting seat (4) is provided with a guide cover (20), and a puncture needle is arranged in the guide cover (20).

20. The blood culture bottle positive sample transfer device according to claim 19, characterized in that: The guide cover (20) is arranged at an end of the connecting seat (4) away from the protective cover (5).

21. The blood culture bottle positive sample transfer device according to claim 13 or 17, characterized in that: The puncture needle is covered with a sealing sleeve (21).

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