CN111631784A - Central venous puncture needle, central venous catheter and central venous puncture method - Google Patents
Central venous puncture needle, central venous catheter and central venous puncture method Download PDFInfo
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- CN111631784A CN111631784A CN202010557822.5A CN202010557822A CN111631784A CN 111631784 A CN111631784 A CN 111631784A CN 202010557822 A CN202010557822 A CN 202010557822A CN 111631784 A CN111631784 A CN 111631784A
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- 238000000034 method Methods 0.000 title claims abstract description 57
- 230000001681 protective effect Effects 0.000 claims abstract description 91
- 238000004891 communication Methods 0.000 claims abstract description 38
- 238000002955 isolation Methods 0.000 claims abstract description 18
- 210000004204 blood vessel Anatomy 0.000 claims description 24
- 239000004033 plastic Substances 0.000 claims description 5
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000002985 plastic film Substances 0.000 claims description 3
- 229920006255 plastic film Polymers 0.000 claims description 3
- 239000008280 blood Substances 0.000 abstract description 36
- 210000004369 blood Anatomy 0.000 abstract description 36
- 239000000443 aerosol Substances 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000012851 eutrophication Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000003191 femoral vein Anatomy 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000004 hemodynamic effect Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000004731 jugular vein Anatomy 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000001321 subclavian vein Anatomy 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0021—Catheters; Hollow probes characterised by the form of the tubing
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0043—Catheters; Hollow probes characterised by structural features
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/09—Guide wires
- A61M2025/09125—Device for locking a guide wire in a fixed position with respect to the catheter or the human body
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Abstract
The invention relates to a central venous puncture needle, a central venous catheter and a central venous puncture method, which comprise a needle tube and a needle seat, wherein the needle seat comprises a first communicating end, a second communicating end and a third communicating end, the first communicating end, the second communicating end and the third communicating end are communicated through a flow passage arranged in the needle seat, one end of the needle tube is fixed at the first communicating end and communicated with the flow passage, and the other end of the needle tube is provided with a needle point; the first communication end is provided with an isolation protection part, the isolation protection part comprises a flexible protective sleeve, and the flexible protective sleeve is compressed and/or folded at the first communication end and used for unfolding along the length direction of the needle tube and covering at least part of guide wires in the process of placing the tube; the puncture needle is simple and compact in structure, and can achieve the purpose of isolating the guide wire in the process of placing the tube, so that the guide wire pasted with blood is effectively prevented from being directly exposed in the air, and the blood can be effectively prevented from splashing and forming aerosol in the air.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a central venous puncture needle capable of preventing blood from splashing, a central venous catheter and a central venous puncture method.
Background
The central venous catheterization (also called central venous catheterization) is widely applied to tumor patients, and the common central venous catheterization ways at present comprise internal jugular veins, subclavian veins and femoral veins, and are mainly suitable for central venous pressure measurement, hemodynamic monitoring, temporary and permanent pacing, venous eutrophication, electrophysiological examination and the like.
When the central venous catheterization is implemented, a set of central venous catheter is generally required, the central venous catheter generally comprises a puncture needle, a guide wire and a catheter, and the central venous catheterization usually comprises the following operation steps:
firstly, a puncture needle punctures a target blood vessel;
secondly, the guide wire is fed in through the puncture needle, namely the puncture needle is used as a tunnel, so that the guide wire is inserted into the target blood vessel through the puncture needle;
withdrawing the puncture needle, namely withdrawing the puncture needle from the outer side of the guide wire;
fourthly, the guide wire is used as a guide, the guide pipe is sleeved on the guide wire, and one end of the guide pipe is inserted into the target blood vessel through the guide wire, so that the guide pipe is arranged at a preset position;
finally, the guide wire is drawn out from the interior of the catheter, thereby finishing the operation of placing the catheter.
In the whole process of catheterization, because the guide wire is inserted into a target blood vessel first and then is drawn out from the target blood vessel, in the process, the outer surface of the guide wire can be pasted with more blood (namely, the guide wire can take the blood out of the target blood vessel).
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a puncture needle with a simple and compact structure, which can achieve the purpose of isolating a guide wire in the process of placing a tube, thereby effectively preventing the guide wire pasted with blood from being directly exposed in the air and effectively preventing the blood from splashing and forming aerosol in the air.
The invention provides a central venous puncture needle capable of preventing blood from splashing, aiming at solving the problem that a guide wire stuck with blood is directly exposed in air in the process of placing a tube, and comprising a needle tube and a needle seat, wherein the needle seat comprises a first communication end, a second communication end and a third communication end, the first communication end, the second communication end and the third communication end are communicated through a flow channel arranged in the needle seat, one end of the needle tube is fixed at the first communication end and communicated with the flow channel, and the other end of the needle tube is provided with a needle point; the first communicating end is provided with an isolation protection part, the isolation protection part comprises a flexible protection sleeve, and the flexible protection sleeve is compressed and/or folded at the first communicating end and used for unfolding and covering at least one part of guide wires along the length direction of the needle tube in the process of placing the tube. In the scheme, the needle seat is of a three-way structure so as to meet the operation requirement in the tube placing process, the first communication end is communicated with the needle tube, and the second communication end and the third communication end are respectively communicated with the first communication end, so that the second communication end and the third communication end can be matched with each other in the tube placing process, the second communication end can be communicated with the injector, and the guide wire can be placed into a blood vessel from the third communication end through the first communication end and the needle tube; after one end of the guide wire is smoothly placed into a blood vessel, when the puncture needle needs to be withdrawn, a medical worker can manually unfold the flexible protective sleeve, so that the flexible protective sleeve can cover the guide wire exposed outside the body, and blood on the guide wire at the part is isolated due to the needle withdrawal process; when emboliaing the pipe, because the seal wire is in the flexible protective sheath, thereby make whole sleeve pipe process go on in the flexible protective sheath, and at last take out the seal wire in-process, all can accomplish in the flexible protective sheath, so that accomodate the seal wire in the seal wire protection pipe that corresponds under the isolation protection of flexible protective sheath, at whole in-process, paste and have whole covers in the flexible protective sheath of the seal wire of blood, play the purpose of isolation, thereby effectively prevent to paste and have blood the seal wire can directly expose in the air, can effectively prevent that blood from splashing and form aerosol in the air.
Preferably, the flexible protective sleeve is a plastic film with a cylindrical structure. Not only is convenient for compressing and accommodating, but also can cover the guide wire.
In order to facilitate the fixing of the flexible protection sleeve, further, one end of the flexible protection sleeve is fixed to the first communication end. So as to stably fix the whole isolation protection part on the needle seat, and in the using process, especially in the process of withdrawing the puncture needle, the flexible protection sleeve can be conveniently disconnected from the first communication end under the action of external force, so that the puncture needle can be smoothly separated from the flexible protection sleeve.
The second aspect of the invention is to solve the problem that the flexible protective sleeve is convenient to compress and/or fold to the minimum volume, and is stably arranged on the needle seat, and further, the isolation protection part further comprises a storage barrel, the storage barrel is arranged outside the first communication end, one end of the storage barrel is fixed on the first communication end, the other end of the storage barrel is provided with a first connecting part, one end of the flexible protective sleeve is provided with a second connecting part matched with the first connecting part, one end of the flexible protective sleeve is detachably fixed on the storage barrel through the matching of the second connecting part and the first connecting part, and the flexible protective sleeve is folded and/or stored between the storage barrel and the outer wall of the first communication end. In this scheme, through setting up the storage cylinder, can be convenient fold and/or accomodate in the inside of storage cylinder with flexible protective sheath for flexible protective sheath can be stable keep minimum volume state, and the one end of flexible protective sheath can be fixed in the storage cylinder through the cooperation detachable of second connecting portion and first connecting portion, not only can realize the fixed to flexible protective sheath, avoids flexible protective sheath to drop, because second connecting portion can be in the tip and the cooperation of first connecting portion of storage cylinder, can play certain effect that blocks to flexible protective sheath, can avoid flexible protective sheath to deviate from in the storage cylinder.
In order to facilitate the arrangement of the second connecting part, the flexible protective sleeve further comprises a first end head, the first end head is of an annular structure, one end of the flexible protective sleeve is connected with the first end head, and the second connecting part is arranged at the first end head. So that the first end head can be detachably fixed on the storage barrel through the matching of the second connecting part and the first connecting part.
Preferably, the second connecting part is an external thread arranged on the first end, the first connecting part is an internal thread arranged on the containing barrel, the external thread is matched with the internal thread,
or, the second connecting part is arranged in the internal thread of the first end, the first connecting part is arranged in the external thread of the storage barrel, and the internal thread is matched with the external thread. Through the cooperation of internal thread and external screw thread, can realize detachable threaded connection.
Preferably, the other end of the flexible protective sleeve is connected with the storage barrel.
The third aspect of the invention aims to solve the problem that the flexible protective sleeve is smoothly unfolded and is not separated from the needle seat in a destructive manner, and further comprises a second end head, wherein the second end head is of an annular structure, the second end head is sleeved between the storage barrel and the outer wall of the first communication end, and the other end of the flexible protective sleeve is connected to the second end head. Set up the second end through the other end at flexible protective sheath, make the other end of flexible protective sheath have certain weight and more regular shape, so that in the assembly process, can be convenient establish into the storage cylinder with the second end cover in, thereby be more convenient for with flexible protective sheath folding and/or accomodate into the storage cylinder in, furthermore, through setting up the second end, need not to link to each other flexible protective sheath and first intercommunication end or storage cylinder, when in-service use, keep away from the storage cylinder gradually along with the first end of flexible protective sheath, make flexible protective sheath can expand gradually and break away from the storage cylinder, the second end that can drive the flexible protective sheath other end at last breaks away from the storage cylinder smoothly, thereby the expansion function of smooth completion whole flexible protective sheath.
In order to prevent the second end head from automatically separating from the containing barrel, further, the inner diameter of the first end head is smaller than the outer diameter of the second end head. Thereby make first end can block the effect to the second end of inside to can prevent effectively that the second end is automatic to break away from the containing barrel.
Preferably, the first end head and/or the second end head are made of rubber or plastics. So as to have certain flexibility and be more convenient to use.
Preferably, the outer diameter of the second end is smaller than or equal to the inner diameter of the containing barrel, and the inner diameter of the second end is larger than the outer diameter of the first communication end. So as to smoothly sleeve the second end head between the outer walls of the storage barrel and the first communication end.
Preferably, the needle seat is made of plastic.
A central venous catheter comprises a guide wire, a catheter and the puncture needle.
In a fourth aspect, the present invention provides a central venous puncture method capable of preventing blood from splashing, including the central venous catheter, the method includes the following steps:
step 1, determining a puncture point, and enabling a needle tip of a puncture needle to enter a target blood vessel through puncture of the puncture point;
step 2, inserting one end of a guide wire into the target blood vessel through a third communication end, a flow passage and a needle tube;
step 3, pulling the flexible protective sleeve open to enable the flexible protective sleeve to be unfolded along the length direction of the needle tube and cover the needle tube between the puncture point and the needle seat;
step 4, moving the needle seat along the direction far away from the puncture point so as to withdraw the puncture needle and keep the position of the guide wire unchanged; in the process, the puncture needle drives the flexible protective sleeve to unfold, the guide wire is covered in the flexible protective sleeve, and after the flexible protective sleeve is completely unfolded, the flexible protective sleeve is separated from the needle base;
step 5, sleeving one end of the catheter in the guide wire in the flexible protective sleeve, and guiding the catheter by using the guide wire so that one end of the catheter is inserted into a preset position of the target blood vessel along the guide wire;
and 6, drawing out the guide wire from the interior of the catheter in the flexible protective sleeve, and accommodating the guide wire into the guide wire protective tube. In the whole process, the guide wire is arranged inside the flexible protective sleeve and cannot be directly exposed in the air, so that not only can nearby surgical instruments such as surgical drapes and bed sheets not be polluted, but also blood can not be splashed outwards, and aerosol can be effectively prevented from being formed in the air.
Compared with the prior art, the central venous puncture needle, the central venous catheter and the central venous puncture method which can prevent blood from splashing outward have simple and compact structures, and can achieve the purpose of isolating the guide wire in the process of placing the catheter, thereby effectively preventing the guide wire stuck with blood from being directly exposed in air, and effectively preventing the blood from splashing outward and forming aerosol in the air.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a conventional central vein puncture needle.
Fig. 2 is a schematic structural diagram of a central venous puncture needle capable of preventing blood from splashing according to embodiment 1 of the present invention, wherein the flexible protective sheath is in a compressed and/or folded state.
Fig. 3 is a structural diagram of a central venous puncture needle capable of preventing blood from splashing according to embodiment 1 of the invention, wherein the flexible protective sleeve is in a unfolding state.
Fig. 4 is a schematic structural diagram of a central venous puncture needle capable of preventing blood from splashing according to embodiment 2 of the present invention, wherein the flexible protective sheath is in a compressed and/or folded state.
Figure 5 is a partial cross-sectional view of a central venous access needle having blood splash protection provided in accordance with example 2 of the present invention, wherein the flexible protective sheath is in a compressed and/or folded state.
Fig. 6 is a structural diagram of a central venous puncture needle capable of preventing blood from splashing according to embodiment 2 of the invention, wherein the flexible protective sleeve is in a unfolding state.
Fig. 7 is a schematic view of the central venous puncture needle capable of preventing blood from splashing in the embodiment 2 of the invention after the flexible protective sleeve is separated from the puncture needle.
Description of the drawings
A needle tube 101, a needle tip 102, a needle hub 103, a first communicating end 104, a second communicating end 105, a third communicating end 106,
The insulation protection part 200, a first end 201, a flexible protection sleeve 202, a second end 203, a storage barrel 204, a first connecting part 205 and a second connecting part 206.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, the present embodiment provides a central venipuncture needle capable of preventing blood from splashing outward, including a needle tube 101 and a needle holder 103, where the needle holder 103 includes a first communicating end 104, a second communicating end 105, and a third communicating end 106, the first communicating end 104, the second communicating end 105, and the third communicating end 106 are communicated with each other through a flow channel disposed in the needle holder 103, one end of the needle tube 101 is fixed to the first communicating end 104 and is communicated with the flow channel, and the other end of the needle tube 101 is configured with a needle tip 102 for puncturing; the needle holder 103 may preferably be made of plastic; as shown in fig. 1, for example, the needle holder 103 may adopt a needle holder 103 commonly used in the prior art, for example, in order to facilitate connection of a syringe, the second communicating end 105 may be further provided with a connector adapted to the syringe, which is not described herein again;
as shown in fig. 2 and fig. 3, in the present embodiment, the first communicating end 104 is provided with an isolation protection portion 200, the isolation protection portion 200 includes a flexible protection sleeve 202, and the flexible protection sleeve 202 is compressed and/or folded at the first communicating end 104 for unfolding along the length direction of the needle tube 101 and covering at least a part of the guide wire during the tube placing process. In this embodiment, the needle holder 103 is a three-way structure so as to meet the operation requirement of the tube insertion process, since the first communicating end 104 is communicated with the needle tube 101, and the second communicating end 105 and the third communicating end 106 are respectively communicated with the first communicating end 104, so that during the tube insertion process, the second communicating end 105 and the third communicating end 106 can be matched with each other, the second communicating end 105 can be communicated with the injector, and the guide wire can be inserted into the blood vessel from the third communicating end 106 and through the first communicating end 104 and the needle tube 101; after one end of the guide wire is smoothly placed into a blood vessel, when the puncture needle needs to be withdrawn, a medical worker can manually unfold the flexible protective sleeve 202, so that the flexible protective sleeve 202 can cover the guide wire exposed outside the body, and blood on the guide wire at the part is isolated due to the needle withdrawal process; when emboliaing the pipe, because the guide wire is in flexible protective sheath 202, thereby make whole sleeve pipe process go on in flexible protective sheath 202, and draw the guide wire in-process at last, all can accomplish in flexible protective sheath 202, so that accomodate the guide wire in the guide wire protection tube that corresponds under flexible protective sheath 202's isolation protection, in whole process, the whole quilt of guide wire that glues to paste and have blood is covered in flexible protective sheath 202, play the purpose of isolation, thereby effectively prevent to glue the guide wire that has blood and can directly expose in the air, can effectively prevent that blood from spattering and form aerosol in the air outward.
As shown in fig. 2, the flexible protective sheath 202 may preferably be a cylindrical plastic film; not only is convenient for compressing and accommodating, but also can cover the guide wire.
To facilitate securing of the flexible boot 202, in a further aspect, one end of the flexible boot 202 is secured to the first communication end 104. So that the whole isolation protection part 200 is stably fixed on the needle seat 103, and during the use process, especially during the process of withdrawing the puncture needle, the flexible protection sleeve 202 can be conveniently disconnected from the first communication end 104 under the action of external force, so that the puncture needle can be smoothly separated from the flexible protection sleeve 202.
When the puncture needle provided by the embodiment is used for central venous catheterization by matching with a guide wire and a catheter, the operation steps can be as follows:
1. the puncture needle punctures the target vessel, during which the flexible protective sheath 202 is in a compressed and/or folded state;
2. the guide wire is fed through the puncture needle, that is, one end of the guide wire is inserted into the target blood vessel through the third communicating end 106, the flow passage and the needle tube 101 in sequence, and in the process, the flexible protective sleeve 202 is in a compressed and/or folded state;
3. manually pulling the flexible protective sleeve 202 open, so that the flexible protective sleeve 202 is partially unfolded and covers the needle tube 101 between the puncture point and the needle seat 103 (a guide wire is arranged in the needle tube 101);
4. withdrawing the puncture needle, namely withdrawing the puncture needle from the outer side of the guide wire, wherein in the process, the needle seat 103 moves in the direction away from the puncture point, and the flexible protective sleeve 202 is driven to continue to be unfolded and the guide wire is covered inside, so that blood adhered to the outer surface of the guide wire in the process that the needle tube 101 is separated from the guide wire is covered inside by the flexible protective sleeve 202, and the purpose of isolation protection is achieved; after the flexible sheath 202 is fully deployed, the flexible sheath 202 may be disengaged from the needle hub 103 under the pulling force, thereby allowing the flexible sheath 202 to be separated from the puncture needle;
5. guiding by using the guide wire, sleeving the guide wire with the catheter, and inserting one end of the catheter into a target blood vessel through the guide wire so that the catheter is arranged at a preset position, wherein the catheter is also inserted into the flexible protective sleeve 202 in the process, namely, the part of the catheter which is remained outside the body is covered in the flexible protective sleeve 202, and the length of the guide wire which is remained outside the body is longer than that of the catheter which is remained outside the body;
6. and finally, the guide wire is drawn out from the interior of the catheter, in the process, the guide wire withdrawn from the target blood vessel is accommodated into the guide wire protection tube in the flexible protection sleeve 202 after being separated from the catheter, so that the recovery of the guide wire is completed, and in the process, the guide wire cannot be directly exposed in the air, so that not only can the surgical instruments nearby be not polluted, such as surgical drapes, bed sheets and the like be prevented, but also the blood can not be splashed outwards, and the aerosol can be effectively prevented from being formed in the air.
Example 2
In order to facilitate the compression and/or folding of the flexible sheath 202 to a minimum volume and to provide a stable arrangement of the flexible sheath 202 on the needle holder 103, the present embodiment 2 is mainly different from the above embodiment 1 in that in the puncture needle provided by the present embodiment, the isolation protection member 200 further comprises a receiving cylinder 204, as shown in fig. 4-7, the receiver 204 is disposed outside of the first communication end 104, one end of the receiving cylinder 204 is fixed to the first communicating end 104, the other end of the receiving cylinder 204 is provided with a first connecting part 205, one end of the flexible protective sheath 202 is provided with a second connecting portion 206 adapted to the first connecting portion 205, one end of the flexible protection sleeve 202 is detachably fixed to the receiving cylinder 204 through the cooperation of the second connecting portion 206 and the first connecting portion 205, and the flexible protection sleeve 202 is folded and/or received between the receiving cylinder 204 and the outer wall of the first connecting end 104. In this embodiment, by providing the storage barrel 204, the flexible protection sleeve 202 can be conveniently folded and/or stored inside the storage barrel 204, so that the flexible protection sleeve 202 can stably maintain a minimum volume state, and one end of the flexible protection sleeve 202 can be detachably fixed to the storage barrel 204 through the cooperation of the second connection portion 206 and the first connection portion 205, which not only can realize the fixation of the flexible protection sleeve 202 and prevent the flexible protection sleeve 202 from falling off, but also can play a certain blocking effect on the flexible protection sleeve 202 because the second connection portion 206 can be matched with the first connection portion 205 at the end of the storage barrel 204, and can prevent the flexible protection sleeve 202 from coming off from the storage barrel 204.
To facilitate the provision of the second connection portion 206, in a further aspect, the connection device further includes a first terminal 201, as shown in fig. 4 to 7, the first terminal 201 is a ring structure, one end of the flexible protection sleeve 202 is connected to the first terminal 201, and the second connection portion 206 is disposed at the first terminal 201; so that the first end 201 is detachably fixed to the receiver 204 by the engagement of the second connection portion 206 with the first connection portion 205.
The first connection portion 205 and the second connection portion 206 have various embodiments, as a preferred embodiment, the second connection portion 206 is an external thread disposed on the first end 201, the first connection portion 205 is an internal thread disposed on the receiving tube 204, as shown in fig. 4-7, the external thread is matched with the internal thread so as to realize detachable connection;
in another preferred embodiment, the second connecting portion 206 is an internal thread disposed on the first end 201, and the first connecting portion 205 is an external thread disposed on the receiving tube 204, and the internal thread is matched with the external thread; through the matching of the internal thread and the external thread, the detachable threaded connection can be realized so as to realize the detachable connection; the number of turns of the internal thread and the external thread can be preferably 1-2.
In a preferred embodiment, the other end of the flexible sheath 202 may be connected to the receiving tube 204, so that the flexible sheath 202 may be separated from the puncture needle by an external force when the puncture needle is separated.
As another preferred embodiment, the connector further includes a second end 203, the second end 203 is a ring-shaped structure, as shown in fig. 4 to 7, the second end 203 is sleeved between the receiving tube 204 and the outer wall of the first communicating end 104, that is, the outer diameter of the second end 203 is smaller than or equal to the inner diameter of the receiving tube 204, and the inner diameter of the second end 203 is larger than the outer diameter of the first communicating end 104;
the other end of the flexible protective sheath 202 is connected to the second end 203; by providing the second end 203 at the other end of the flexible protection sleeve 202, the other end of the flexible protection sleeve 202 has a certain weight and a relatively regular shape, so that the second end head 203 can be conveniently sleeved into the containing cylinder 204 in the assembling process, thereby further facilitating folding and/or stowing of the flexible boot 202 into the receptacle 204, and, in addition, by providing the second end 203, the flexible boot 202 need not be connected to the first communication end 104 or the receptacle 204, in actual use, as the first tip 201 of the flexible protective sleeve 202 gradually moves away from the receiving cylinder 204, so that the flexible boot 202 can be gradually deployed and disengaged from the receptacle 204, and finally, under the action of a suitable external force, the second end 203 of the other end of the flexible protection sleeve 202 can be driven to smoothly separate from the receiving cylinder 204, so that the expansion function of the whole flexible protection sleeve 202 can be smoothly completed.
In order to prevent the second tip 203 from automatically separating from the receiving cylinder 204, in a further aspect, the inner diameter of the first tip 201 is smaller than the outer diameter of the second tip 203, as shown in fig. 5, so that the first tip 201 can block the inner second tip 203, and the second tip 203 can be effectively prevented from automatically separating from the receiving cylinder 204.
Preferably, the first tip 201 and/or the second tip 203 may be made of rubber or plastic, so as to have certain flexibility and elasticity, and particularly, when the second tip 203 has certain elasticity, the second tip may be clamped in the receiving cylinder 204 through elastic deformation, so that when the puncture needle is withdrawn, the flexible protection sleeve 202 may be moved synchronously and completely unfolded under the driving of the puncture needle, and after the flexible protection sleeve 202 is completely unfolded, under the continuous action of an external force, the second tip 203 may be separated from the puncture needle conveniently without any damage.
In addition, because the first end 201 and the second end 203 are arranged, because the first end 201 and the second end 203 have a certain weight, when the flexible protection sleeve 202 is completely unfolded, the first end 201 and the second end 203 can be respectively kept flat on a support (such as a bed sheet, an operation cover cloth and the like) under the action of self gravity, so that the purpose of automatically closing the two ends of the flexible protection sleeve 202 can be achieved, and further, the blood splashing can be prevented more favorably and the aerosol can be effectively prevented from being formed in the air.
Example 3
The embodiment provides a central venous catheter, which comprises a guide wire, a catheter matched with the guide wire and the puncture needle in embodiment 1 or embodiment 2, wherein the puncture needle is matched with the guide wire and the puncture needle; medical personnel can utilize seal wire, pipe and pjncture needle, combine current central vein catheterization operation step to carry out the operation of putting the pipe.
To adapt the catheter and the puncture needle to the guide wire, it will be appreciated that the outer diameter of the guide wire is smaller than the inner diameter of the needle cannula, the inner diameter of the flow passage and the inner diameter of the third communication end 106, and the outer diameter of the guide wire is smaller than the inner diameter of the catheter.
Example 4
According to the central venous catheter provided in embodiment 3, the present embodiment provides a central venous puncture method capable of preventing blood from splashing, which includes the central venous catheter described in embodiment 3, and the method includes the following steps:
step 1, determining a puncture point, and enabling a needle tip of a puncture needle to enter a target blood vessel through puncture of the puncture point; during this process, the flexible sheath 202 is in a compressed and/or folded state, the puncturing operation may be the same as the prior art, and after the puncturing operation is completed, a certain distance is usually kept between the needle holder and the skin of the puncturing point;
and 2, delivering one end of the guide wire into the target blood vessel through the puncture needle. The specific method comprises the following steps: one end of a guide wire is inserted into the third communication end 106 and the guide wire is inserted into the target vessel via the flow channel, needle 101, during which the flexible boot 202 is in a compressed and/or folded state.
Step 3, the flexible protective sleeve 202 is pulled open manually, so that the flexible protective sleeve 202 is unfolded along the length direction of the needle tube and covers the needle tube 101 between the puncture point and the needle seat 103, and one end of the flexible protective sleeve 202, which is far away from the needle seat, can be unfolded to the position of the puncture point (for convenience of subsequent operation, the end can be temporarily stuck to the puncture point or the vicinity of the puncture point by using a medical adhesive tape), at this moment, one end of the guide wire is positioned in the target blood vessel, and the other end is positioned outside the third communication end 106 of the puncture needle.
And 4, withdrawing the puncture needle and keeping the position of the guide wire unchanged. The specific method comprises the following steps: the puncture needle is drawn out from the outer side of the guide wire, in the process, the needle seat 103 moves along the direction far away from the puncture point, the flexible protective sleeve 202 is driven to continue to expand, and the guide wire is covered in the flexible protective sleeve 202, so that blood adhered to the outer surface of the guide wire in the process that the needle tube 101 is separated from the guide wire is covered in the flexible protective sleeve 202, the puncture needle can be conveniently withdrawn, the purpose of isolating and protecting the guide wire in the needle withdrawing process can be achieved, and the blood on the outer surface of the guide wire is effectively prevented from splashing or causing pollution; after the flexible protection sleeve 202 is completely unfolded, under the action of pulling force, the flexible protection sleeve 202 can be separated from the needle seat 103, so that the flexible protection sleeve 202 can be separated from the puncture needle, and the guide wire remained outside the body can be completely covered by the separated flexible protection sleeve 202;
and 5, sleeving one end of the catheter on the guide wire in the flexible protective sleeve 202, and guiding the catheter by using the guide wire so that one end of the catheter is inserted into a preset position of the target blood vessel along the guide wire. During this process, the catheter and guidewire are mated within the flexible protective sheath 202; preferably, the length of the catheter indwelling outside the body is smaller than that of the guide wire indwelling outside the body, and the length of the guide wire indwelling outside the body is smaller than that of the flexible protective sleeve 202, so that the guide wire and the catheter can be covered inside, and the guide wire in the catheter can be conveniently drawn out subsequently;
step 6, the guide wire is withdrawn from the inside of the catheter in the flexible protective sheath 202, and the guide wire is stored in the guide wire protective tube. In the process, after the guide wire withdrawn from the target blood vessel is separated from the catheter, the guide wire can be contained in the guide wire protection tube in the flexible protection sleeve 202 to complete the recovery of the guide wire, namely, in the whole process of recovering the guide wire, the guide wire is positioned in the flexible protection sleeve 202 and cannot be directly exposed in the air, so that not only can the surgical instruments nearby be not polluted, such as surgical drapes, bed sheets and the like, but also blood can not be splashed outwards, and aerosol can be effectively prevented from being formed in the air.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention.
Claims (10)
1. A central venous puncture needle is characterized by comprising a needle tube and a needle seat, wherein the needle seat comprises a first communicating end, a second communicating end and a third communicating end, the first communicating end, the second communicating end and the third communicating end are communicated through a flow channel arranged in the needle seat, one end of the needle tube is fixed at the first communicating end and is communicated with the flow channel, and the other end of the needle tube is provided with a needle point; the first communicating end is provided with an isolation protection part, the isolation protection part comprises a flexible protection sleeve, and the flexible protection sleeve is compressed and/or folded at the first communicating end and used for unfolding and covering at least one part of guide wires along the length direction of the needle tube in the process of placing the tube.
2. A central venipuncture needle according to claim 1, wherein the flexible protective sheath is a plastic film of cylindrical configuration.
3. A central venipuncture needle according to claim 2, wherein one end of the flexible sheath is fixed to the first communicating end.
4. A central venous puncture needle according to claim 1 or 2, characterized in that the isolation protection part further comprises a storage barrel, the storage barrel is arranged outside the first communication end, one end of the storage barrel is fixed on the first communication end, the other end of the storage barrel is provided with a first connection part, one end of the flexible protection sleeve is provided with a second connection part adapted to the first connection part, one end of the flexible protection sleeve is detachably fixed on the storage barrel through the cooperation of the second connection part and the first connection part, and the flexible protection sleeve is folded and/or stored between the storage barrel and the outer wall of the first communication end.
5. A central venipuncture needle according to claim 4, further comprising a first tip having a ring-like configuration, one end of the flexible sheath being connected to the first tip, and the second connecting portion being provided on the first tip.
6. A central venipuncture needle according to claim 5, wherein the second connecting portion is an external thread provided on the first tip, the first connecting portion is an internal thread provided on the receiving cylinder, the external thread is adapted to the internal thread,
or, the second connecting part is arranged in the internal thread of the first end, the first connecting part is arranged in the external thread of the storage barrel, and the internal thread is matched with the external thread.
7. A central venipuncture needle according to claim 5, wherein the other end of the flexible sheath is connected to the receiving cylinder,
or the like, or, alternatively,
still include the second end, the second end is annular structure, the second end headgear is located between the outer wall of containing cylinder and first intercommunication end, the other end of flexible protective sheath connect in the second end.
8. A central venipuncture needle according to claim 7, wherein the inner diameter of said first tip is smaller than the outer diameter of said second tip, and said first tip and/or said second tip are made of rubber or plastic.
9. A central venous catheter comprising a guide wire, a catheter and a puncture needle according to any of claims 1 to 8.
10. A method of central venipuncture comprising the central venous catheter of claim 9, said method comprising the steps of:
step 1, determining a puncture point, and enabling a needle tip of a puncture needle to enter a target blood vessel through puncture of the puncture point;
step 2, inserting one end of a guide wire into the target blood vessel through a third communication end, a flow passage and a needle tube;
step 3, manually pulling the flexible protective sleeve open to enable the flexible protective sleeve to be unfolded along the length direction of the needle tube and cover the needle tube between the puncture point and the needle seat;
step 4, moving the needle seat along the direction far away from the puncture point so as to withdraw the puncture needle and keep the position of the guide wire unchanged; in the process, the puncture needle drives the flexible protective sleeve to unfold, the guide wire is covered in the flexible protective sleeve, and after the flexible protective sleeve is completely unfolded, the flexible protective sleeve is separated from the needle base;
step 5, sleeving one end of the catheter in the guide wire in the flexible protective sleeve, and guiding the catheter by using the guide wire so that one end of the catheter is inserted into a preset position of the target blood vessel along the guide wire;
and 6, drawing out the guide wire from the interior of the catheter in the flexible protective sleeve, and accommodating the guide wire into the guide wire protective tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010557822.5A CN111631784A (en) | 2020-06-18 | 2020-06-18 | Central venous puncture needle, central venous catheter and central venous puncture method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010557822.5A CN111631784A (en) | 2020-06-18 | 2020-06-18 | Central venous puncture needle, central venous catheter and central venous puncture method |
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| CN111631784A true CN111631784A (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010557822.5A Pending CN111631784A (en) | 2020-06-18 | 2020-06-18 | Central venous puncture needle, central venous catheter and central venous puncture method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115252078A (en) * | 2022-07-28 | 2022-11-01 | 储慧民 | Pericardium puncture needle |
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| US4767409A (en) * | 1983-05-23 | 1988-08-30 | Edward Weck Incorporated | Catheter protective shield |
| US5290244A (en) * | 1992-06-08 | 1994-03-01 | Dilip Moonka | Syringe and needle with guide wire for cannulation of central veins |
| US20030040706A1 (en) * | 2001-07-25 | 2003-02-27 | Kuracina Thomas C. | Method and apparatus for indicating or covering a percutaneous puncture site |
| CN212234622U (en) * | 2020-06-18 | 2020-12-29 | 四川省肿瘤医院 | Central venous puncture needle capable of preventing blood from splashing and central venous catheter |
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2020
- 2020-06-18 CN CN202010557822.5A patent/CN111631784A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4767409A (en) * | 1983-05-23 | 1988-08-30 | Edward Weck Incorporated | Catheter protective shield |
| US5290244A (en) * | 1992-06-08 | 1994-03-01 | Dilip Moonka | Syringe and needle with guide wire for cannulation of central veins |
| US20030040706A1 (en) * | 2001-07-25 | 2003-02-27 | Kuracina Thomas C. | Method and apparatus for indicating or covering a percutaneous puncture site |
| CN212234622U (en) * | 2020-06-18 | 2020-12-29 | 四川省肿瘤医院 | Central venous puncture needle capable of preventing blood from splashing and central venous catheter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115252078A (en) * | 2022-07-28 | 2022-11-01 | 储慧民 | Pericardium puncture needle |
| CN115252078B (en) * | 2022-07-28 | 2024-04-26 | 储慧民 | Pericardium puncture needle |
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