WO2014019192A1 - Integral vacuum blood collection apparatus with indwelling catheter - Google Patents

Description

 Integral vacuum blood collection device with indwelling catheter Technical field

 The invention relates to a human external vacuum blood collection device for clinical medical treatment, in particular to an integral vacuum blood collection device with an indwelling catheter.

 Background technique

 A vacuum blood collection device in the prior art is shown in FIG. 1 and FIG. 2, and includes a blood collection needle and a blood sample collection tube. One end of the blood collection needle is a vascular puncture needle 11 and the other end is provided with a rubber sleeve blood collection needle 12, and the middle is connected by a soft connection tube 13. When the device is used for blood collection, the protective sleeve on the two needle tubes is first removed, and the blood vessel is inserted into the needle tube. 11 Pierce the patient's arm vein, wait for the blood to enter the blood collection catheter, and the medical staff immediately press the needle handle of the blood vessel needle 11 with the little finger to prevent the needle tube from falling off; because the blood sample collection tube 2 The sealing rubber plug is very thick, and the blood collecting needle 12 has a large angle of the bevel, the needle tip is blunt, and the blood collecting needle 12 is tight when the sealing tube is subjected to axial compression, so the hands need to be used to take the blood collecting needle 12 Piercing into the blood sample collection tube is quite inconvenient to operate. Due to blood sample collection tube 2 The inside is negative pressure and the blood flows into the collection tube at a faster rate. To collect the required sample volume, if multiple blood samples need to be collected, the blood collection needle 12 can be pulled out from the collection tube 2 by both hands. At this time, the blood collection tube 12 The outer soft rubber sleeve is restored, and the blood collection needle tube is wrapped to prevent the blood in the catheter from flowing out to pollute the environment, and then the previous intubation operation is repeated; if it is not necessary to draw blood, the human needle on the human body must be pulled out first. Then, put on the needle tip sheath, and then remove the blood collection needle 12 on the collection tube 2 . It can be seen that the vacuum blood collection device has a separate structure of the blood collection needle 1 and the collection tube 2, and the blood collection process needs to pay attention to the soft connection tube at the same time. The two needles lead to complicated and cumbersome operation, multiple operation steps even require hands and a certain and just enough force to complete the extraction and insertion of the needle tube, and at this time, it is impossible to care for the needle tube at the other end, and thus It involves the coordinated operation of more than one medical staff. This complicated and cumbersome operation and the presence of two needles, Invisibly increases the workload and psychological burden of medical staff, and it is prone to misuse in the case of patients with unconsciousness, incitement, uncooperative patients, and infants and children with large physical activity. The puncture needle inserted into the blood vessel is easy to oscillate during the puncture process and the blood collection process. This swing directly causes the needle tip of the puncture needle to damage the blood vessel. This kind of injury can hardly be avoided without cooperating with the large range of the limb movement of the patient. And the damage caused is even greater.

 Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to overcome the deficiencies in the prior art and to provide an integrated vacuum blood collection device having an indwelling catheter which is simplified in structure, simple in operation, and difficult to damage blood vessels.

 The object of the present invention is achieved by the following route.

 Integral vacuum blood collection device with indwelling catheter The utility model comprises a puncture needle tube, a soft extension tube, a blood collection needle tube and a blood sample collection tube with an operation handle, etc., and the main point of the composition is that the blood collection needle holder has a cylindrical cavity and a cylindrical cavity tail. The end is open, the blood collection needle tube is fixed on the front end wall thereof and extends backward into the cylindrical cavity, and the blood sample collection tube tube plug is inserted into the cylindrical cavity in a pluggable manner in front, and the tube shape is empty The length of the cavity is smaller than the length of the blood sample collection tube, and the tail of the blood sample collection tube inserted in the cylindrical cavity is exposed outside the cylindrical cavity, and the front end surface of the blood sample collection tube and the front end wall of the cylindrical cavity have gap A. The back wall of the blood sample collection tube plug has a sealing layer pierceable by the rear end of the blood collection tube, and the thickness of the sealing layer is smaller than the gap A. The thickness of the cylindrical cavity has a connection structure adapted to the blood sample collection tube plug, which is coupled with the blood sample collection tube plug to form a tight connection relationship, and the blood sample collection tube is loaded through the structure. And removing the cylindrical cavity, the puncture needle is an indwelling needle, the indwelling needle catheter die, the soft extension tube die, the blood collection needle tube core, and the blood sample collection tube lumen after being pierced by the sealing layer constitute a blood channel .

In this way, the blood collection needle holder is added and the blood sample collection tube is connected with the blood collection needle holder and the blood collection needle tube in advance, so that the whole blood collection device is integrated, and the above-mentioned cylindrical cavity and the tube plug are not only convenient for blood sample collection. The tube is loaded and removed, and at the same time, it is connected with the blood sample collection tube tube plug to form a tight connection relationship, so that the blood sample collection tube inserted in the cylindrical cavity is not easy to fall off when standing upright, and the touch is sensed. The degree of insertion of the blood sample collection tube installed in the cylindrical cavity is given to facilitate installation. The puncture needle is replaced by an indwelling needle. The indwelling needle can be a general medical indwelling needle. Thus, the needle tip only serves to puncture the blood vessel and guide the catheter into the blood vessel. Once the blood is returned, the needle tip is evacuated and the blood vessel is flexible. The catheter is retained in the blood vessel as a channel for blood collection; in an emergency, the catheter can be temporarily placed for infusion after blood collection.

In actual use, firstly, the needle tip of the indwelling needle is inserted into the blood vessel of the human body. After seeing the blood returning, the needle is pushed back and the handle is retracted, the needle tip is retracted into the catheter a little, the puncture height is lowered, the catheter is sent into the blood vessel, and then the retraction is continued. After the tip of the needle reaches the catheter, at this time, the blood enters the soft extension tube die from the catheter tube, and the blood is filled with the soft extension tube, the small thumb is gently pressed to fix the catheter, and the remaining four fingers pinch the blood collection needle seat, due to the tube sealing layer Thinner, the other hand gently pushes the blood sample collection tube from the bottom, allowing the needle of the blood collection needle to pass through the sealant and enter the collection tube until the collection tube touches the front wall of the cylindrical cavity and cannot move forward; After the negative pressure in the tube, the blood quickly flows into the blood collection tube to the required sample volume. If multiple blood samples need to be collected, the blood collection needle holder can be pinched, the blood sample collection tube can be easily withdrawn, and a new collection tube can be inserted for blood collection. After the blood collection is finished, the human end catheter is withdrawn first, and then the blood collection tube is withdrawn. Since the blood collection needle holder is longer than the blood collection needle tube, it can ensure that the needle tip of the blood collection needle does not injure the person, and the blood collection needle is in the process of repeatedly changing the blood collection tube. The seat also plays a role of insertion and guiding. The blood collection needle tip does not puncture the person, so it plays a safety protection role. At the same time, the blood collection needle sealing tube rebounds and seals, and the blood collection needle head is sealed to avoid blood pollution.

It can be seen that the two bodies in the prior art are separated and integrated, the structure is simplified, the operation is simple and easy, and the phenomenon that the puncture needle tip damages the blood vessel is prevented, and the occurrence of phlebitis and the metal allergy release are reduced.

 The object of the present invention can also be achieved by the following means.

 The length of the indwelling needle catheter is 18-22 mm.

 Generally, the length of the medical indwelling needle catheter is long, and since the catheter in this patent is mainly used for blood collection, the length is optimal after trial and error.

 Also included is an infusion connector secured to the end of the soft extension tube through which the soft extension tube is detachably coupled to the blood collection needle holder.

In an emergency, after the blood is collected, the present invention can be used for infusion. The setting of the infusion connector facilitates the connection with the infusion device. When used, the soft connecting tube can be clamped by the flow stop clamp, the blood flow channel can be blocked, the blood collection needle holder can be detached from the infusion connector, and the previously prepared infusion set can be inserted immediately. Infusion treatment can be performed by opening the extension tube upper stop clip and restoring the fluid passage.

 Such an infusion connector can be a conventional direct head, needleless connector.

 The invention can be further optimized to:

 When the cylindrical cavity and the plug are in an adapted connection state, the rear end of the blood collection needle is just in front of the sealing layer to be pierced.

 This makes it easy to grasp the degree of pre-insertion of the blood collection needle on the inserted touch.

 The adapted connection configuration has a variety of options, such as the size of the inner diameter of the barrel and the transition fit. The following is an optimized choice:

 The configuration in the cylindrical cavity that fits the plug is a plurality of configurations that are circumferentially distributed or symmetrically distributed along the inner wall of the cylindrical cavity.

 The elastic snap configuration can be a short arc cam or the blood sample collection tube plug is made of a resilient material.

The elastic snap-in configuration can cause an elastic tight connection between the inner wall of the cylindrical cavity and the plug, but the blood sample collection tube can still be pushed forward or backward relative to the cylindrical cavity when an axial force is applied.

Such short arc convex card points, as the name suggests, are bumps protruding from the inner wall of the cylindrical cavity, the thickness is low and the front and rear sides have curved transitions to facilitate the crawling of the pipe plug.

It is also possible to add other fitting connection structures on the basis of the elastic snap-in configuration to achieve better use effect. The following is one of the optimized use:

The configuration in the cylindrical cavity that fits the plug is a plurality of elastic snap contacts that are circumferentially distributed or symmetrically distributed along the inner wall of the cylindrical cavity, and another suitable configuration is made in the tube. L on the outer circumference of the plug a groove and a projecting point formed on the inner wall of the cylindrical cavity, the protruding point entering from the end of the vertical section of the L-shaped groove at the front end face of the pipe plug The groove can slide therein, and when the inner wall of the cylindrical cavity is elastically caught by the pipe plug, the protruding point has entered L In the vertical section of the shaped groove but not yet reaching the bottom end of the vertical section, the rear end of the blood collection needle tube is just before the sealing layer to be pierced, and after the current blood sample collection tube to the blood collection needle tube pierces the sealing layer, The protruding point just reaches the bottom end of the vertical section, at this time, the blood sample collection tube is rotated, and the protruding point enters A cross-section in an L-shaped groove.

 In this way, L The cross-section in the slot can lock the freedom of the blood sample collection tube in the axial direction so that it can neither push forward nor retreat relative to the blood collection needle holder.

 The blood sample collection tube can also be connected to the cylindrical cavity in this way:

 The blood sample collection tube is threaded into the cylindrical cavity and the adapted configuration is a threaded connection configuration.

The blood sample collection tube plug is composed of a sealing rubber plug and a protective cover, the sealing rubber plug is plugged in the collecting tube lumen, and the protective cover is plugged on the collecting tube nozzle and the sealing rubber plug.

 The configuration adapted to the cylindrical cavity is generally provided on the protective cover.

The blood collection needle tube is covered with a blood collection sealing sleeve, and the blood sample collection tube tube plug center is provided with a core hole extending axially to the sealing layer, and the inner diameter of the core hole is slightly larger than the outer diameter of the blood collection sealing sleeve.

In this way, when the blood collection needle tube and the blood collection sealing sleeve penetrate the tube plug along the core hole, the blood collection sealing sleeve is subjected to the axial compression compression and the radial distortion expansion deformation, which is just pressed and rubbed against the inner hole wall of the core hole, and the blood collection needle tube is not allowed. Take out the sealant plug.

 The blood sample collection tube plug sealing layer has a thickness of 3-0.5 MM, preferably 1.5-0.5 MM.

 This allows the blood collection tube to easily penetrate the sealing layer.

The blood collection needle holder is disposed at a position corresponding to the inner portion of the blood sample collection tube in the cylindrical cavity, and a long groove is arranged along the axial direction of the blood collection needle seat as an operation window. The operation window has two, relative distribution On both sides of the cylindrical cavity.

In this way, the blood can be observed through the operation window, the state of the blood volume in the blood sample collection tube can be observed, the insertion state and the insertion degree of the blood sample collection tube can also be observed, and the blood sample collection tube can be first passed through the operation window. The pinch plug is forced back out of the blood sample collection tube to prevent detachment of the collection tube body from the tube plug when exiting the blood sample collection tube.

In summary, the present invention has the following advantages over the prior art: adding a blood collection needle holder and previously connecting the blood sample collection tube with the blood collection needle holder and the blood collection needle tube, so that the entire blood collection device becomes an integral structure, and the tubular shape is empty The configuration of the cavity and the plug is adapted to the structure of the elastic snap, which is convenient for the blood sample collection tube inserted in the cylindrical cavity to not fall off when standing upright, and is also installed in the cylindrical cavity from the tactile sensation. The blood sample collection tube is inserted to facilitate the installation. The entire device structure is simplified and the operation is simple and easy. The replacement of the puncture needle into the indwelling needle prevents the puncture needle tip from damaging the blood vessel, reduces the occurrence of phlebitis and the metal allergy release. In an emergency state, the catheter can be temporarily indwelled for blood transfusion after blood collection.

 DRAWINGS

 BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the state in which a blood sample collection tube of a vacuum blood collection device is inserted in the prior art.

 Fig. 2 is a schematic view showing the state in which the blood sample collection tube of the vacuum blood collection device is withdrawn in the prior art.

 Fig. 3 is a perspective view showing the appearance of an integral vacuum blood collection device having an indwelling catheter according to the present invention.

 Fig. 4 is a schematic view showing the structure of an integrated vacuum blood collection device having an indwelling catheter according to the present invention.

 Fig. 5 is a view showing the state of the integrated vacuum blood collection device with an indwelling catheter according to the present invention after blood collection.

 Fig. 6 is a schematic front view showing the structure of a blood collection needle holder in the first embodiment of the present invention.

 Fig. 7 is a schematic plan view showing the structure of a blood collection needle holder in the first embodiment of the present invention.

 Figure 8 is a schematic view showing the structure of a blood sample collection tube protective cover in the second embodiment of the present invention.

 Figure 9 is a schematic perspective view showing the structure of a blood sample collection tube protective cover in the second embodiment of the present invention.

 Figure 10 is a schematic perspective view showing the structure of a blood sample collection tube protective cover in a preferred embodiment of the present invention.

 Label description:

 11 puncture needle 12 blood collection needle 13 soft connection tube 14 blood collection gland 2 blood sample collection tube 21 sealing layer 22 Protective cover 23 Sealant plug 24 Core hole 25L Groove vertical section 26L Groove cross section 3 Blood collection needle seat 31 Cylindrical cavity 32 Operating window 33 Short arc convex card point 4 Infusion connector 5 Stop clip.

The invention will now be described in greater detail with reference to the drawings.

detailed description

 Embodiment 1:

 Referring to Fig. 3 and Fig. 4, an integral vacuum blood collection device with an indwelling catheter, including a puncture needle 11 and a soft connecting tube 13 , blood collection needle 12, blood sample collection tube 2, blood collection needle holder 3 and an infusion connector 4 . The puncture needle 11 is a closed type indwelling needle having a puncture needle with a blood return groove, and the length of the indwelling needle catheter is 20 mm, the indwelling needle has a wrap in the figure, but it can also be without a wrap. The soft connecting tube 13 is connected at one end to the puncture needle tube 11 and the other end is connected to the infusion connector 4 , the infusion connector 4 It is a direct head fixed to the end of the soft extension tube 13 through which the soft extension tube 13 is detachably connected to the blood collection needle holder 3. Blood collection needle holder 3 has a cylindrical cavity 31 The end of the cylindrical cavity is open, and the blood collection needle 12 is fixed on the front end wall thereof and extends rearward into the cylindrical cavity 31. The blood sample collection tube 2 is inserted in the front and inserted in the pluggable manner. Cylindrical cavity 31 The length of the cylindrical cavity 31 is smaller than the length of the blood sample collection tube 2, and the tail of the blood sample collection tube 2 inserted in the cylindrical cavity is exposed outside the cylindrical cavity 31, and the blood sample collection tube 2 There is a gap A between the front end surface and the front end wall of the cylindrical cavity 31, and the blood sample collection tube 2 has a sealing layer 21 which can be pierced by the rear end of the blood collection needle tube 12, and the sealing layer 21 The thickness is smaller than the thickness of the gap A, and the cylindrical cavity 31 has a configuration adapted to the blood sample collection tube 2, the indwelling needle tube core, the soft connecting tube 13 the tube, and the blood collection tube 12 The wick and the blood sample collection tube 2 after being pierced by the sealing layer 21 form a blood channel.

 Referring to Fig. 4, the blood sample collection tube 2 tube plug is composed of a sealing rubber plug 23 and a protective cover 22, and the sealing rubber plug 23 The sleeve is plugged into the collection tube lumen, and the protective cover 22 is capped on the collection tube nozzle and the sealing plug 23. The front end surface of the blood sample collection tube 2 is the front end surface of the protective cover. The aforementioned blood sample collection tube 2 The sealing layer 21 of the rear end wall of the pipe plug is located on the sealant plug. The seal layer thickness is 1.0MM.

 Referring to Figure 6 and Figure 7, the cylindrical cavity 31 The inner fit to the plug is a configuration of two resilient snaps that are circumferentially symmetrically distributed along the inner wall of the cylindrical cavity. The elastic snap construction is a short arc convex click point 33, which is a short arc convex click point 33 Made of elastic material. When the protective cover 22 of the blood sample collection tube 2 is in contact with the short arc convex click point 33, the rear end of the blood collection needle 12 is just in front of the sealing layer 21 to be pierced.

 Referring to Fig. 6 and Fig. 7, the blood collection needle holder 3 is contained in the cylindrical cavity with the blood sample collection tube 2 in the tube plug 31 A long slot is provided along the axial direction of the blood collection needle holder 3 as an operation window 32. The operation window 32 has two opposite sides and is relatively distributed on both sides of the cylindrical cavity 31. This operation window 32 It is offset from the short arc convex card point 33 by 90 degrees.

 Referring to Fig. 4 and Fig. 5, the blood collection needle tube 12 is covered with a blood collection sealing sleeve 14 The blood sample collection tube plug center is provided with a core hole 24 extending axially to the sealing layer 21, and the inner diameter of the core hole 24 is slightly larger than the outer diameter of the blood collection sealing sleeve 14. In this way, the blood collection needle 12 is brought with the blood collection sealing sleeve 14 When the plug hole is inserted through the core hole 24, the blood collection sealing sleeve 14 is subjected to axial compression and compression, and is radially twisted and expanded, just like the core hole 24 The inner hole wall is pressed and rubbed, and the blood collection needle tube is not allowed to come out of the sealing rubber plug.

 Referring to Figure 5, the infusion connector 4 can also be a needleless connector for catheter indwelling connection.

In actual use, firstly, the needle tip of the indwelling needle is inserted into the blood vessel of the human body. After seeing the blood returning, the needle is pushed back and the handle is retracted, the needle tip is retracted into the catheter a little, the puncture height is lowered, the catheter is sent into the blood vessel, and then the retraction is continued. After the tip of the needle reaches the catheter, at this time, the blood enters the soft extension tube die from the catheter tube, and the blood is filled with the soft extension tube. The small finger is gently pressed to fix the catheter, and the remaining four fingers pinch the blood collection needle holder. 3. Since the tube seal layer 21 is relatively thin, the other hand gently pushes the blood sample collection tube 2 from the bottom, and the needle tip of the blood collection needle tube 12 passes through the sealing layer 21 into the collection tube until the collection tube and the cylindrical cavity 31. The front end wall can no longer move forward; due to the negative pressure inside the collection tube, the blood quickly flows into the blood collection tube 2 to the required sample volume. If multiple blood samples need to be collected, the blood collection needle holder 3 can be pinched and penetrated. Through operation window 32 Pinch the blood sample collection tube 2 and easily withdraw it, then insert a new collection tube to collect blood. After the blood collection is completed, the indwelling catheter of the human body is withdrawn first, and then the blood collection tube 2 is withdrawn. If you need infusion, you can use the flow clamp 5 to clamp the soft connection tube. 13、Exit the blood collection tube 2, and then exit the blood collection needle holder 3. At this time, the infusion operation can be performed through the infusion connector 4. Since the blood collection needle holder 3 is longer than the blood collection needle 12, the blood collection needle can be ensured 12 The tip of the needle does not injure people, and during the process of repeatedly changing the blood collection tube, the blood collection needle holder 3 also serves as an insertion guide, and the blood collection needle tip does not puncture the person, so that the safety protection function is provided, and the blood collection sealing sleeve is also provided. The rebound was sealed and 12 blood collection tubes were sealed to avoid blood contamination.

 The parts not described in this embodiment are the same as the prior art.

 Embodiment 2:

 Referring to Fig. 8 and Fig. 9, the structure of the cylindrical cavity 31 which is adapted to the pipe plug is composed of short arc convex points 33 And a threaded connection configuration in which male and female threads in the threaded connection are formed on the inner peripheral wall of the protective cover 22 and the cylindrical cavity 31, respectively. First, the blood sample collection tube 2 is screwed into the cylindrical cavity 31 In the middle, when the short arc convex card point 33 is touched, the screwing is stopped, and the rear end of the blood collecting needle 12 is just in front of the sealing layer 21 to be pierced. When blood is collected, the blood collection needle can be passed through the sealing layer 21 again by spiraling.

 The parts not described in this embodiment are the same as those in the first embodiment.

 Best embodiment:

 Refer to Figure 10 The configuration in the cylindrical cavity that fits the pipe plug is a plurality of elastic snap contacts distributed circumferentially or symmetrically along the inner wall of the cylindrical cavity, the elastic snap contact structure being a short arc convex The card point, the short arc convex card point and the blood sample collection tube plug are made of an elastic material. Another suitable configuration is made in the plug protection cover 22 an L-shaped groove on the outer peripheral surface and a projecting point formed on the inner wall of the cylindrical cavity, the protruding point entering from the end of the vertical section 25 of the L-shaped groove at the front end face of the pipe plug The slot can slide therein, and when the inner wall of the cylindrical cavity is elastically engaged with the plug protection cover, the protruding point has entered the vertical section 25 in the L-shaped slot but has not yet reached the bottom of the vertical section 25. End, at this time, the blood collection tube 12 Immediately before the sealing layer 21 to be pierced, the front blood sample collection tube 2 to the blood collection needle 12 pierce the sealing layer 21, the protruding point just reaches the vertical section 25 At the bottom end, the blood sample collection tube 2 is rotated at this time, and the projecting point enters the cross-fold section 26 in the L-shaped groove. Thus, the cooperation of the cross-section 26 in the L-shaped groove with the protruding point can lock the blood sample collection tube 2 The degree of freedom in the axial direction makes it impossible to push forward or backward relative to the blood collection needle holder 3.

 The parts not described in this embodiment are the same as those in the first embodiment.

Claims (15)

Integral vacuum blood collection device with indwelling catheter The utility model comprises a puncture needle tube, a soft extension tube, a blood collection needle tube and a blood sample collection tube with an operation handle, etc., characterized in that the method further comprises a blood collection needle holder, the blood collection needle holder has a cylindrical cavity, and the cylindrical cavity tail end Open, the blood collection needle tube is fixed on the front end wall thereof and extends backward into the cylindrical cavity, and the blood sample collection tube tube plug is inserted in the cylindrical cavity in a pluggable manner in front, the cylindrical cavity The length of the blood sample collection tube is smaller than the length of the blood sample collection tube, and the tail of the blood sample collection tube inserted in the cylindrical cavity is exposed outside the cylindrical cavity, and there is a gap between the front end surface of the blood sample collection tube and the front end wall of the cylindrical cavity. A. The back wall of the blood sample collection tube plug has a sealing layer pierceable by the rear end of the blood collection tube, and the thickness of the sealing layer is smaller than the gap A. The thickness of the cylindrical cavity has a connection structure adapted to the blood sample collection tube plug, which is coupled with the blood sample collection tube plug to form a tight connection relationship, and the blood sample collection tube is loaded through the structure. And removing the cylindrical cavity, the puncture needle is an indwelling needle, the indwelling needle catheter die, the soft extension tube die, the blood collection needle tube core, and the blood sample collection tube lumen after being pierced by the sealing layer constitute a blood channel . The integrated vacuum blood collection device with an indwelling catheter according to claim 1, wherein the length of the indwelling needle catheter is 18-22 Millimeter. An integrated vacuum blood collection device having an indwelling catheter according to claim 1, wherein Also included is an infusion connector secured to the end of the soft extension tube through which the soft extension tube is detachably coupled to the blood collection needle holder. An integrated vacuum blood collection device having an indwelling catheter according to claim 1, wherein When the cylindrical cavity and the plug are in an adapted connection state, the rear end of the blood collection needle is just in front of the sealing layer to be pierced. An integrated vacuum blood collection device having an indwelling catheter according to claim 4, wherein The configuration of the cylindrical cavity adapted to the plug is a plurality of elastic snap contacts distributed circumferentially or symmetrically along the inner wall of the cylindrical cavity, through which the inner wall of the cylindrical cavity is constructed by elastic snapping The plug is in an elastically tightly connected state, but the elastic retarding force is less than the manually applied axial force. An integrated vacuum blood collection device having an indwelling catheter according to claim 5, wherein The elastic snap configuration can be a short arc cam or the blood sample collection tube plug is made of a resilient material. An integrated vacuum blood collection device having an indwelling catheter according to claim 6, wherein The short arc convex snap point is a bump protruding from the inner wall of the cylindrical cavity, the thickness is low and the front and rear sides have arc-shaped transitions for facilitating the plug creeping. An integrated vacuum blood collection device having an indwelling catheter according to claim 1 or 4, wherein The configuration in the cylindrical cavity that fits the plug is a plurality of elastic snap contacts that are circumferentially distributed or symmetrically distributed along the inner wall of the cylindrical cavity, and another suitable configuration is made in the tube. L on the outer circumference of the plug a groove and a projecting point formed on the inner wall of the cylindrical cavity, the protruding point entering from the end of the vertical section of the L-shaped groove at the front end face of the pipe plug The groove can slide therein, and when the inner wall of the cylindrical cavity is elastically caught by the pipe plug, the protruding point has entered L In the vertical section of the shaped groove but not yet reaching the bottom end of the vertical section, the rear end of the blood collection needle tube is just before the sealing layer to be pierced, and after the current blood sample collection tube to the blood collection needle tube pierces the sealing layer, The protruding point just reaches the bottom end of the vertical section, at this time, the blood sample collection tube is rotated, and the protruding point enters A cross-section in an L-shaped groove. An integrated vacuum blood collection device having an indwelling catheter according to claim 1 or 4, wherein The blood sample collection tube is threaded into the cylindrical cavity and the adapted configuration is a threaded connection configuration. An integrated vacuum blood collection device having an indwelling catheter according to claim 1, wherein The blood sample collection tube plug is composed of a sealing rubber plug and a protective cover, the sealing rubber plug is plugged in the collecting tube lumen, and the protective cover is plugged on the collecting tube nozzle and the sealing rubber plug. An integrated vacuum blood collection device having an indwelling catheter according to claim 1, wherein The blood sample collection tube plug is composed of a sealing rubber plug and a protective cover, the sealing rubber plug is plugged in the collecting tube lumen, and the protective cover is plugged on the collecting tube nozzle and the sealing rubber plug to match the cylindrical cavity. The construction is placed on the protective cover. An integrated vacuum blood collection device having an indwelling catheter according to claim 1, wherein The blood collection needle tube is covered with a blood collection sealing sleeve, and the blood sample collection tube tube plug center is provided with a core hole extending axially to the sealing layer. The inner diameter of the core hole is slightly larger than the outer diameter of the blood collection sealing sleeve, and the blood collection needle tube is taken along with the blood collection sealing sleeve. When the core hole penetrates the pipe plug, the blood collection sealing sleeve is subjected to axial compression and compression, and is radially twisted and expanded, and is pressed against the inner wall of the core hole. The integrated vacuum blood collection device with an indwelling catheter according to claim 1, wherein the thickness of the blood sample collection tube plug sealing layer is 3-0.5MM. An integrated vacuum blood collection device having an indwelling catheter according to claim 13, wherein Blood sample collection tube plug sealing layer thickness is 1.5-0.5MM. An integrated vacuum blood collection device having an indwelling catheter according to claim 1, wherein The blood collection needle holder is disposed at a position corresponding to the inner portion of the blood sample collection tube in the cylindrical cavity, and a long groove is arranged along the axial direction of the blood collection needle seat as an operation window. The operation window has two, relative distribution On both sides of the cylindrical cavity.

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