CN108324291B - Blood sample collection anti-backflow valve device and blood taking needle - Google Patents
Blood sample collection anti-backflow valve device and blood taking needle Download PDFInfo
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- CN108324291B CN108324291B CN201810248418.2A CN201810248418A CN108324291B CN 108324291 B CN108324291 B CN 108324291B CN 201810248418 A CN201810248418 A CN 201810248418A CN 108324291 B CN108324291 B CN 108324291B
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- 239000008280 blood Substances 0.000 title claims abstract description 192
- 210000004369 blood Anatomy 0.000 title claims abstract description 192
- 230000000151 anti-reflux effect Effects 0.000 claims abstract description 55
- 230000002265 prevention Effects 0.000 claims description 40
- 210000003462 vein Anatomy 0.000 claims description 19
- 238000010241 blood sampling Methods 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 5
- 230000002441 reversible effect Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000001990 intravenous administration Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 239000012503 blood component Substances 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 208000015181 infectious disease Diseases 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000001575 pathological effect Effects 0.000 description 2
- 238000007920 subcutaneous administration Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150206—Construction or design features not otherwise provided for; manufacturing or production; packages; sterilisation of piercing element, piercing device or sampling device
- A61B5/150221—Valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
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- Biomedical Technology (AREA)
- Hematology (AREA)
- Medical Informatics (AREA)
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- Surgery (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
The invention provides a blood sample collection anti-reflux valve device and a blood taking needle, and relates to the technical field of medical appliances. In addition, the whole sterile treatment of the blood collection container can be omitted, and the cost is saved.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a blood sample collection anti-backflow valve device and a blood taking needle.
Background
In the medical field, medical staff collect and acquire physiological and pathological information of human bodies through various means for correctly diagnosing diseases, wherein the collection of blood samples generally has the following three ways: (1) subcutaneous blood sampling is often used for simple sorting, counting and detecting blood components, and subcutaneous blood sampling needles are often used. (2) Vein blood sampling can be used for carrying out detailed detection on hematology, blood endogenous etiology and other relevant subject indexes, has wide application in clinic, and is mostly used as a pen type or split type vein blood sampling needle. (3) Arterial blood sampling is mostly carried out in critical emergency, arterial blood gas index detection is rarely applied, and a special injector for arterial blood sampling is mostly used for collecting. The blood sample is collected and tested to obtain blood component, bacteriology and virology infection level in blood and to understand physiological and pathological condition of human body, or to understand the effect of medicine treatment and to judge the disease development, prognosis, etc.
Among them, venous blood collection is the most common blood collection method. However, in actual practice, blood in a blood collection container often flows back to the human body during venous blood collection of the human body, and therefore, the production standard of the blood collection container is established in a sterile manner. However, most negative pressure blood collection tubes are glass, and many reagents in blood collection containers are expressed as living bacteria, so that a method of sterilizing the whole blood collection container is very difficult.
The anti-reflux effect of the intravenous blood taking needle in the prior art is not ideal, so that the development of the blood sample collection anti-reflux valve device and the blood taking needle capable of effectively preventing the back flow of the extracted blood into the human body is particularly important.
In view of this, the present invention has been made.
Disclosure of Invention
The first object of the present invention is to provide a blood sample collection anti-reflux valve device and a blood taking needle, which solve the technical problem that the back flow of the extracted blood back into the human body frequently occurs in the prior art.
A blood sample collection anti-reflux valve device, wherein the blood sample collection anti-reflux valve device comprises: the device comprises a first connecting seat, an elastic anti-reflux valve and a second connecting seat, wherein a first through hole is formed in the middle of the first connecting seat, the elastic anti-reflux valve is arranged on the first connecting seat, and the second connecting seat is matched with the first connecting seat to form a cavity for accommodating the elastic anti-reflux valve; the second connecting seat is provided with a concave cavity and is in clamping connection with the first connecting seat; the second connecting seat is provided with a second through hole communicated with the outside;
the elastic reverse flow prevention valve includes: the valve body is integrally arranged at the front end of the valve body and used for inserting and installing the first elastic angle of the first through hole, the valve body is integrally arranged at the rear end of the valve body and used for propping against the inner bottom wall of the concave cavity of the second connecting seat so as to enable the valve body to unidirectionally close at least two deformable second elastic angles of the first through hole, and the middle part of the valve body is provided with a convex ring edge covering the end part of the first through hole; the bottom wall in the concave cavity of the second connecting seat is propped by the deformable second elastic angle, so that the valve main body is opened and closed, the first through hole is normally closed, and negative pressure is received and is in an opened state.
The blood sample collection anti-reflux valve device comprises a valve body, a first elastic angle and a second elastic angle, wherein the first elastic angle is a conical angle with a tip end in a pointed shape, namely the first elastic conical angle; the second elastic angle is a conical angle with a pointed end, namely the second elastic conical angle.
The blood sample collection anti-reflux valve device comprises a valve body, wherein the cross section of a first elastic conical angle is triangular, the cross section of a second elastic conical angle is triangular, and the number of the second elastic conical angles is two and is symmetrically arranged at one end of the valve body.
The blood sample collection anti-reflux valve device is characterized in that the outer edge of the convex ring is circular, square or polygonal.
The blood sample collection anti-reflux valve device, wherein, the first connecting seat includes: the first boss is used for clamping and installing the elastic anti-backflow valve, and the first interface is arranged on the opposite side of the first boss and integrally formed with the first boss and is used for being connected with a connecting hose connected with a blood sampling puncture needle; and a protruding ring cover for covering the concave cavity of the second connecting seat is formed between the first boss and the first interface in a protruding way, and the first through hole penetrates from the upper surface of the first boss to the first interface.
The blood sample collection anti-reflux valve device, wherein, the second connecting seat includes: the cavity is used for being matched with the first connecting seat to form a cavity for accommodating the elastic backflow prevention valve, the second connector is connected to the opposite side of the cavity and integrally formed with the cavity, and the connector used for being connected with a pipe plug puncture needle of a negative pressure pipe is arranged on the second connector.
The blood sample collection anti-reflux valve device, wherein, the cavity is inside to inwards set gradually and is used for cup jointing the first circular portion of cup jointing of installing in first connecting seat one end and is used for forming the second circular portion of cup jointing of holding the cavity of elasticity anti-reflux valve, the internal diameter of second circular portion of cup jointing is less than first circular portion of cup jointing.
The blood sample collection anti-reflux valve device is characterized in that the first through hole and the second through hole are arranged on the same straight line; the elastic anti-reflux valve is a food-grade silica gel one-way anti-reflux valve.
A lancet, comprising: the device comprises a vein blood taking needle for penetrating blood taking, a tube plug puncture needle for connecting a negative pressure blood taking tube and a connecting part for connecting the vein blood taking needle and the tube plug puncture needle;
the connecting part comprises a blood taking needle handle, a connecting hose and a one-way backflow prevention valve device which are sequentially connected, wherein the one-way backflow prevention valve device is the blood sample collection backflow prevention valve device;
the blood taking needle handle is connected with the vein blood taking needle, the tube plug puncture needle is connected with the blood sample collection backflow prevention valve device, and the blood sample collection backflow prevention valve device is provided with an elastic backflow prevention valve for preventing the backflow of the extracted blood back to the vein.
The blood taking needle is characterized in that a blood taking needle protecting sleeve is sleeved outside the venous blood taking needle, and a puncture needle protecting sleeve is sleeved outside the tube plug puncture needle.
The invention provides a blood sample collection anti-backflow valve device and a blood taking needle, comprising: the device comprises a first connecting seat, an elastic anti-reflux valve and a second connecting seat, wherein a first through hole is formed in the middle of the first connecting seat, the elastic anti-reflux valve is arranged on the first connecting seat, and the second connecting seat is matched with the first connecting seat to form a cavity for accommodating the elastic anti-reflux valve; the second connecting seat is provided with a concave cavity and is in clamping connection with the first connecting seat; the second connecting seat is provided with a second through hole communicated with the outside; the elastic reverse flow prevention valve includes: the valve body is integrally arranged at the front end of the valve body and used for inserting and installing the first elastic conical angle of the first through hole, the valve body is integrally arranged at the rear end of the valve body and used for propping against the inner bottom wall of the concave cavity of the second connecting seat so as to enable the valve body to unidirectionally close at least two deformable second elastic conical angles of the first through hole, and the middle part of the valve body is provided with a convex ring edge covering the end part of the first through hole; the bottom wall in the concave cavity of the second connecting seat is propped by the deformable second elastic conical angle, so that the valve main body is opened and closed, the first through hole is normally closed, and negative pressure is received and is in an opened state.
Compared with the prior art, the blood sample collection anti-reflux valve device is provided with the elastic anti-reflux valve which is in a normal closed state and is in a linear slit structure for receiving negative pressure and is in an open state; in the process of blood collection of the vein of the human body, the elastic backflow prevention valve is in an open state, after blood collection is finished, the elastic backflow prevention valve returns to a normally closed state, and the negative pressure blood collection container is pulled out, so that blood in the negative pressure blood collection container is prevented from instantaneously returning to the human body, the negative pressure blood collection container is completely isolated from the human body, and even if bacteria exist in the negative pressure blood collection container, the negative pressure blood collection container does not harm the human body.
In the blood sampling process, the blood sample collection anti-reflux valve device of the blood taking needle is opened, the sampled blood can pass through the connecting part, and after the blood collection is finished, the blood sample collection anti-reflux valve device is closed immediately, and the sampled blood cannot flow back through the connecting part. Through the arrangement of the blood sample collection anti-reflux valve device, the collected blood can flow to the direction of the tube plug puncture needle only through the connecting part by the venous blood taking needle, so that the collected blood is effectively prevented from flowing back into the human body, and the damage to the human body caused by the entering of the contaminated blood into the human body is avoided. In addition, the whole sterile treatment of the blood collection container can be omitted, and the cost is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the structure of a lancet according to embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of a valve device for preventing backflow of blood sample collection according to embodiment 1 of the present invention;
FIG. 3 is a schematic diagram of an explosion structure of a valve device for preventing backflow of blood sample collection according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of an elastic anti-reflux valve structure of the anti-reflux valve device for blood sample collection according to embodiment 1 of the present invention.
Fig. 5 is a schematic diagram of a second connection seat of the anti-backflow valve device for blood sample collection according to embodiment 1 of the present invention.
Icon: 1-a venous blood taking needle; 2-a tube plug puncture needle; 3-a blood sample collection anti-reflux valve device; 4-a blood taking needle handle; 5-connecting a hose; 10-connecting part; 301-a first through hole; 31-a first connection base; 32-an elastic anti-reflux valve; 33-a second connection socket; 302-cavity; 331-a cavity; 303-a second via; 321-a valve body; 322-first elastic angle; 323-a second elastic angle; 3211-convex ring edges; 311-a first boss; 312-first interface; 313-projecting ring cover; 332-a second interface; 3321-connector; 3312—a first circular socket; 3313—a second circular socket; 3311—a projection; 15-a blood taking needle protecting sleeve; 16-puncture needle protecting sleeve.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that, if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are used, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present invention and simplifying the description, and does not indicate or imply that the indicated apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like, as used herein, are used for descriptive purposes only and are not to be construed as indicating or implying any relative importance.
In the description of the present invention, it should be noted that unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 1, the present embodiment provides a lancet device, as shown in fig. 1, including: a venous blood taking needle 1 for puncturing blood taking, a stopcock puncture needle 2 for connecting a negative pressure blood taking tube, and a connecting part 10 for connecting the venous blood taking needle 1 and the stopcock puncture needle 2.
The connecting part 10 comprises a blood taking needle handle 4, a connecting hose 5 and a blood sample collection anti-backflow valve device 3 which are connected in sequence; the blood taking needle handle 4 is connected with the venous blood taking needle 1, the tube plug puncture needle 2 is connected with the blood sample collection backflow prevention valve device 3, and the blood sample collection backflow prevention valve device 3 is provided with an elastic backflow prevention valve for preventing the backflow of the collected blood back to the vein.
The venous blood taking needle 1 is used for penetrating into a venous blood vessel, so that the blood taking needle device provided by the invention is communicated with the venous blood vessel; the stopcock puncture needle 2 is used for puncturing into a blood collection device (for example, a negative pressure blood collection tube) so that the blood collection device provided by the invention is communicated with the blood collection device.
In this embodiment, the elastic backflow prevention valve is arranged on the blood sample collection backflow prevention valve device 3, so that the blood in the negative pressure blood collection container is prevented from instantaneously returning to the human body, and the human body is not injured.
In the embodiment of the present invention, the connection portion 10 is provided with the blood sample collection anti-reflux valve device 3 for preventing the back flow of the collected blood to the vein, the specific structure of the connection portion 10 is not limited, and the device capable of sealing and connecting the venous blood taking needle 1 and the stopcock puncture needle 2 can be used as the connection portion of the present invention, for example, but not limited to, a rubber hose or a plastic hose.
Of course, in this embodiment, the mounting position of the blood sample collection anti-backflow valve device 3 at the connection portion 10 is different from the position of the embodiment shown in fig. 1 (i.e., the connection portion 10 includes the lancet handle 4, the connection hose 5 and the blood sample collection anti-backflow valve device 3 connected in sequence), for example, but not limited to, the connection portion 10 includes the lancet handle 4, the blood sample collection anti-backflow valve device 3, the connection hose 5 and the like connected in sequence, i.e., the blood sample collection anti-backflow valve device 3 may be mounted at the rear end of the lancet handle 4, and the same effect is achieved.
In a preferred embodiment, as shown in fig. 2 and 3, the anti-backflow valve device 3 for blood sample collection according to the embodiment of the present invention includes: a first connection seat 31 with a first through hole 301 in the middle, an elastic backflow prevention valve 32 installed on the first connection seat 31, and a second connection seat 33 cooperating with the first connection seat 31 to form a cavity 302 accommodating the elastic backflow prevention valve 32; the second connecting seat 33 is provided with a concave cavity 331 and is in clamping connection with the first connecting seat 31; the second connecting seat 33 is provided with a second through hole 303 communicated with the outside. In this embodiment, the second connecting seat 33 is engaged with the first connecting seat 31, and the second connecting seat 33 is provided with a cavity 331, as shown in fig. 5, which is mounted on the first connecting seat 31 in a close fit, so as to form a cavity 302 for accommodating the elastic anti-backflow valve 32. The second connecting seat 33 is provided with a second through hole 303 communicated with the outside.
In this embodiment, as shown in fig. 4, the elastic backflow prevention valve 32 preferably includes: a valve body 321 integrally disposed at the front end of the valve body 321 and used for inserting and mounting the first elastic angle 322 in the first through hole 301, at least two deformable second elastic angles 323 integrally disposed at the rear end of the valve body 321 and used for propping against the inner bottom wall of the concave cavity of the second connecting seat 33 so as to enable the valve body 321 to unidirectionally close the first through hole 301 (as in the embodiment shown in fig. 4, the deformable second elastic angles 323 are preferably two and symmetrically disposed; the deformable second elastic angle 323 is used to prop against the bottom wall in the concave cavity of the second connecting seat 33, as shown in fig. 2, so that the valve main body 321 opens and closes the first through hole 301 to be in a normally closed state by default and to receive negative pressure to be in an open state.
Further, as shown in fig. 4, the first elastic angle 322 is a taper angle with a tip end, i.e., a first elastic taper angle; the second elastic angle 323 is a taper angle with a tip end in a pointed shape, namely, a second elastic taper angle. The cross section of the first elastic taper angle (first elastic angle 322 shown in fig. 4) is triangular, the cross section of the second elastic taper angle is triangular, and the second elastic taper angles are two and symmetrically arranged at one end of the valve main body 321.
In this embodiment, the outer edge of the convex ring edge 3211 may be circular, square or polygonal. As long as the elastic backflow prevention valve 32 is in a default state, the convex ring edge 3211 can cover the first through hole 301, and seal to prevent backflow of blood.
In the embodiment of the present invention, the elastic anti-backflow valve 32 in the blood sample collection anti-backflow valve device 3 is in a normally closed state in a default state, that is, the convex ring edge 3211 of the elastic anti-backflow valve 32 props against the bottom wall in the concave cavity of the second connecting seat 33 through the deformable second elastic angle 323 in the default state, as shown in fig. 2, so that the convex ring edge 3211 of the valve main body 321 covers the first through hole 301 and is in a normally closed state in default; when the second through hole 303 receives the negative pressure, the second elastic angle 323 is pressed to deform, so that the elastic anti-backflow valve 32 is in an open state, blood collection is performed, and blood collection is completed, the deformable second elastic angle 323 of the elastic anti-backflow valve 32 props against the bottom wall in the concave cavity of the second connecting seat 33, so that the convex ring edge 3211 of the valve main body 321 covers the first through hole 301 and is restored to a normally closed state. In addition, the whole sterile treatment of the blood collection container can be omitted, and the cost is saved.
Further, as shown in fig. 3, the first connecting seat 31 includes: a first boss 311 for clamping and installing the elastic anti-backflow valve 32, a first interface 312 arranged on the opposite side of the first boss 311 and integrally formed with the first boss 311, and a first interface 312 for connecting with a connecting hose 5 connected with a blood sampling puncture needle; and a protruding ring cover 313 for covering the concave cavity of the second connecting seat 33 is protruding between the first boss 311 and the first interface 312, and the first through hole 301 is provided from the upper surface of the first boss 311 to the first interface 312. In this embodiment, the elastic anti-backflow valve 32 is snapped into the through hole of the first boss 311; and then the second connecting seat 33 is covered, and the bottom wall in the concave cavity of the second connecting seat 33 is propped by the deformable second elastic angle 323, so that no backflow is caused when the blood collection is completed without negative pressure, and the safety of the blood collection is further improved.
Further, as shown in fig. 3, the second connection base 33 includes: the cavity 331 for accommodating the cavity of the elastic backflow prevention valve 32 is formed by matching with the first connecting seat 31, the second connector 332 is connected to the opposite side of the cavity 331 and integrally formed with the cavity 331, and the connector 3321 for connecting with a tube plug puncture needle of a negative pressure tube is arranged on the second connector 332.
As shown in fig. 5, the cavity 331 of the second connecting seat 33 is sequentially provided with a first circular socket joint 3312 for sleeving and installing at one end of the first connecting seat 31 and a second circular socket joint 3313 for forming a cavity for accommodating the elastic backflow prevention valve 32 from outside to inside, the inner diameter of the second circular socket joint 3313 is smaller than that of the first circular socket joint 3312, and a protruding part 3311 for tightly engaging with the first boss 311 is formed at the joint of the second circular socket joint 3313 and the first circular socket joint 3312, so that leakage is avoided, and the safety of blood collection is further improved.
In this embodiment, preferably, the first through hole 301 and the second through hole 303 are disposed on the same straight line, so that the blood sampling resistance is reduced, which is more beneficial to blood sampling; the elastic backflow prevention valve 32 is a food-grade silica gel one-way backflow prevention valve, so that the safety of the blood taking needle can be effectively ensured.
Further, as shown in fig. 1, the intravenous blood taking needle 1 is sleeved with a blood taking needle protecting sleeve 15, and the tube plug puncture needle 2 is sleeved with a puncture needle protecting sleeve 16. The protective sleeves are respectively sleeved outside the vein blood taking needle 1 and the tube plug puncture needle 2, so that on one hand, the vein blood taking needle 1 and the tube plug puncture needle 2 can not be polluted before use, and adverse consequences such as infection after puncture into a human body are prevented, and on the other hand, the vein blood taking needle 1 and the tube plug puncture needle 2 can also be prevented from stabbing operators before use.
When using the lancet provided in this embodiment, a blood taking person first removes the lancet protective cover 15, then holds the lancet handle 4, pierces the venous blood taking needle 1 into the vein of the person to be blood taken, confirms that the puncture is accurate, then removes the puncture needle protective cover 16, and pierces the tube stopper puncture needle 2 through the tube stopper into the blood taking tube. At this time, the blood sample collection reverse flow prevention valve device 3 is opened by the negative pressure in the blood collection tube, and venous blood enters the blood collection tube through the venous blood collection needle 1, the connection part 10 and the stopcock puncture needle 2. When the blood collection amount is enough, the tube plug puncture needle 2 is pulled out of the tube plug of the blood collection tube, the blood sample collection anti-backflow valve device 3 is closed immediately, the collected blood cannot flow reversely through the connecting part, and then the venous blood collection needle 1 is pulled out, so that the blood collection operation is completed.
Example 2
The venous blood sample collection anti-backflow valve device provided in this embodiment is a component in the blood sampling device in embodiment 1, the technical content disclosed in embodiment 1 is not repeated in this embodiment, the disclosure of embodiment 1 also belongs to the disclosure of this embodiment, and the technical scheme described in embodiment 1 also belongs to this embodiment, and this embodiment is not repeated.
As shown in fig. 2 and 3, the anti-backflow valve device 3 for blood sample collection according to the embodiment of the present invention includes: a first connection seat 31 with a first through hole 301 in the middle, an elastic backflow prevention valve 32 installed on the first connection seat 31, and a second connection seat 33 cooperating with the first connection seat 31 to form a cavity 302 accommodating the elastic backflow prevention valve 32; the second connecting seat 33 is provided with a concave cavity 331 and is in clamping connection with the first connecting seat 31; the second connecting seat 33 is provided with a second through hole 303 communicated with the outside. In this embodiment, the second connecting seat 33 is engaged with the first connecting seat 31, and the second connecting seat 33 is provided with a cavity 331, as shown in fig. 5, which is mounted on the first connecting seat 31 in a close fit, so as to form a cavity 302 for accommodating the elastic anti-backflow valve 32. The second connecting seat 33 is provided with a second through hole 303 communicated with the outside.
In this embodiment, as shown in fig. 4, the elastic backflow prevention valve 32 preferably includes: a valve main body 321, a first elastic angle 322 integrally arranged at the front end of the valve main body 321 and used for being inserted and installed in the first through hole 301, at least two deformable second elastic angles 323 integrally arranged at the rear end of the valve main body 321 and used for propping against the inner bottom wall of the concave cavity of the second connecting seat 33 so as to enable the valve main body 321 to unidirectionally close the first through hole 301, and a convex ring edge 3211 covering the end part of the first through hole 301 is arranged in the middle of the valve main body 321; the deformable second elastic angle 323 is used to prop against the bottom wall in the concave cavity of the second connecting seat 33, as shown in fig. 2, so that the valve main body 321 opens and closes the first through hole 301 to be in a normally closed state by default and to receive negative pressure to be in an open state.
Further, as shown in fig. 4, the first elastic angle 322 is a taper angle with a tip end, i.e., a first elastic taper angle; the second elastic angle 323 is a taper angle with a tip end in a pointed shape, namely, a second elastic taper angle. The cross section of the first elastic taper angle (first elastic angle 322 shown in fig. 4) is triangular, the cross section of the second elastic taper angle is triangular, and the second elastic taper angles are two and symmetrically arranged at one end of the valve main body 321.
In this embodiment, the outer edge of the convex ring edge 3211 may be circular, square or polygonal. As long as the elastic backflow prevention valve 32 is in a default state, the convex ring edge 3211 can cover the first through hole 301, and seal to prevent backflow of blood.
In the embodiment of the present invention, the elastic anti-backflow valve 32 in the blood sample collection anti-backflow valve device 3 is in a normally closed state in a default state, that is, the convex ring edge 3211 of the elastic anti-backflow valve 32 props against the bottom wall in the concave cavity of the second connecting seat 33 through the deformable second elastic angle 323 in the default state, as shown in fig. 2, so that the convex ring edge 3211 of the valve main body 321 covers the first through hole 301 and is in a normally closed state in default; when the second through hole 303 receives the negative pressure, the second elastic angle 323 is pressed to deform, so that the elastic anti-backflow valve 32 is in an open state, blood collection is performed, and blood collection is completed, the deformable second elastic angle 323 of the elastic anti-backflow valve 32 props against the bottom wall in the concave cavity of the second connecting seat 33, so that the convex ring edge 3211 of the valve main body 321 covers the first through hole 301 and is restored to a normally closed state. In addition, the whole sterile treatment of the blood collection container can be omitted, and the cost is saved.
In summary, the blood sample collection anti-reflux valve device and the blood taking needle provided by the invention comprise: the device comprises a first connecting seat, an elastic anti-reflux valve and a second connecting seat, wherein a first through hole is formed in the middle of the first connecting seat, the elastic anti-reflux valve is arranged on the first connecting seat, and the second connecting seat is matched with the first connecting seat to form a cavity for accommodating the elastic anti-reflux valve; the second connecting seat is provided with a concave cavity and is in clamping connection with the first connecting seat; the second connecting seat is provided with a second through hole communicated with the outside; the elastic reverse flow prevention valve includes: the valve body is integrally arranged at the front end of the valve body and used for inserting and installing the first elastic conical angle of the first through hole, the valve body is integrally arranged at the rear end of the valve body and used for propping against the inner bottom wall of the concave cavity of the second connecting seat so as to enable the valve body to unidirectionally close at least two deformable second elastic conical angles of the first through hole, and the middle part of the valve body is provided with a convex ring edge covering the end part of the first through hole; the bottom wall in the concave cavity of the second connecting seat is propped by the deformable second elastic conical angle, so that the valve main body is opened and closed, the first through hole is normally closed, and negative pressure is received and is in an opened state.
Compared with the prior art, the blood sample collection anti-reflux valve device is provided with the elastic anti-reflux valve which is in a normal closed state and is in a linear slit structure for receiving negative pressure and is in an open state; in the process of blood collection of the vein of the human body, the elastic backflow prevention valve is in an open state, after blood collection is finished, the elastic backflow prevention valve returns to a normally closed state, and the negative pressure blood collection container is pulled out, so that blood in the negative pressure blood collection container is prevented from instantaneously returning to the human body, the negative pressure blood collection container is completely isolated from the human body, and even if bacteria exist in the negative pressure blood collection container, the negative pressure blood collection container does not harm the human body.
In the blood sampling process, the blood sample collection anti-reflux valve device of the blood taking needle is opened, the sampled blood can pass through the connecting part, and after the blood collection is finished, the blood sample collection anti-reflux valve device is closed immediately, and the sampled blood cannot flow back through the connecting part. Through the arrangement of the blood sample collection anti-reflux valve device, the collected blood can flow to the direction of the tube plug puncture needle only through the connecting part by the venous blood taking needle, so that the collected blood is effectively prevented from flowing back into the human body, and the damage to the human body caused by the entering of the contaminated blood into the human body is avoided. In addition, the whole sterile treatment of the blood collection container can be omitted, and the cost is saved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (6)
1. A blood sample collection anti-reflux valve device, comprising: the device comprises a first connecting seat, an elastic anti-reflux valve and a second connecting seat, wherein a first through hole is formed in the middle of the first connecting seat, the elastic anti-reflux valve is arranged on the first connecting seat, and the second connecting seat is matched with the first connecting seat to form a cavity for accommodating the elastic anti-reflux valve; the second connecting seat is provided with a concave cavity and is in clamping connection with the first connecting seat; the second connecting seat is provided with a second through hole communicated with the outside;
the blood sample collection anti-reflux valve device is provided with an elastic anti-reflux valve with a linear slit structure which is in a normally closed state and receives negative pressure and is in an open state in a default state, and the elastic anti-reflux valve is used for preventing the back flow of the extracted blood to the vein;
the elastic reverse flow prevention valve includes: the valve body is integrally arranged at the front end of the valve body and used for inserting and installing the first elastic angle of the first through hole, the two deformable second elastic angles are integrally arranged at the rear end of the valve body and used for propping against the inner bottom wall of the concave cavity of the second connecting seat so as to enable the valve body to unidirectionally close the first through hole, and the middle part of the valve body is provided with a convex ring edge covering the end part of the first through hole; the bottom wall in the concave cavity of the second connecting seat is propped by the deformable second elastic angle, so that the valve main body opens and closes the first through hole to be in a normally closed state by default and receives negative pressure to be in an open state;
the two deformable second elastic angles are symmetrically arranged;
the inner wall of the concave cavity of the second connecting seat is provided with a convex edge for pressing the mounting part of the elastic anti-backflow valve so as to prevent the elastic anti-backflow valve from shaking;
the first elastic angle is a conical angle with a pointed tail end, namely a first elastic conical angle; the second elastic angle is a conical angle with a pointed tail end, namely a second elastic conical angle;
the cross section of the first elastic taper angle is triangular, the cross section of the second elastic taper angle is triangular, and the number of the second elastic taper angles is two and is symmetrically arranged at one end of the valve main body;
the first connecting seat comprises: the first lug boss is used for clamping and installing the elastic anti-backflow valve, and the first connector is arranged on the opposite side of the first lug boss and integrally formed with the first lug boss and is used for being connected with a connecting hose connected with a blood sampling puncture needle; a protruding ring cover for covering the concave cavity of the second connecting seat is formed between the first boss and the first interface in a protruding way, and the first through hole penetrates from the upper surface of the first boss to the first interface; the elastic anti-backflow valve is clamped into the through hole of the first boss; then the second connecting seat is covered, and the bottom wall in the concave cavity of the second connecting seat is propped by the deformable second elastic angle, so that no backflow can be caused when no negative pressure is generated after blood collection;
the second connecting seat comprises: the cavity is used for being matched with the first connecting seat to form a cavity for accommodating the elastic backflow prevention valve, the second interface is connected to the opposite side of the cavity and is integrally formed with the cavity, and a connector used for being connected with a pipe plug puncture needle of a negative pressure pipe is arranged on the second interface;
the elastic anti-reflux valve in the blood sample collection anti-reflux valve device is in a normally closed state in a default state, namely, the convex ring edge of the elastic anti-reflux valve props against the bottom wall in the concave cavity of the second connecting seat through a deformable second elastic angle in the default state, so that the convex ring edge of the valve main body covers the first through hole and is in the normally closed state by default; when the second through hole receives the negative pressure, the second elastic angle is extruded to deform, so that the elastic anti-backflow valve is in an open state, blood collection is carried out, and the blood collection is completed.
2. The blood sample collection valve assembly of claim 1, wherein the outer edge of the collar is rounded, square or polygonal.
3. The blood sample collection anti-reflux valve device according to claim 1, wherein a first circular socket portion for socket-connecting with one end of the first connecting seat and a second circular socket portion for forming the cavity for accommodating the elastic anti-reflux valve are sequentially provided in the cavity from outside to inside, and an inner diameter of the second circular socket portion is smaller than that of the first circular socket portion.
4. The blood sample collection valve device of claim 1, wherein the first and second through holes are disposed on a common line; the elastic anti-reflux valve is a food-grade silica gel one-way anti-reflux valve.
5. A lancet, comprising: the device comprises a vein blood taking needle for penetrating blood taking, a tube plug puncture needle for connecting a negative pressure blood taking tube and a connecting part for connecting the vein blood taking needle and the tube plug puncture needle;
the connecting part comprises a blood taking needle handle, a connecting hose and a one-way backflow prevention valve device which are sequentially connected, wherein the one-way backflow prevention valve device is the blood sample collection backflow prevention valve device according to any one of claims 1-4;
the blood taking needle handle is connected with the vein blood taking needle, the tube plug puncture needle is connected with the blood sample collection backflow prevention valve device, and the blood sample collection backflow prevention valve device is provided with an elastic backflow prevention valve for preventing the backflow of the extracted blood back to the vein.
6. The lancet of claim 5, wherein the intravenous lancet is sheathed with a lancet protective sheath and the stopcock lancet is sheathed with a lancet protective sheath.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810248418.2A CN108324291B (en) | 2018-03-24 | 2018-03-24 | Blood sample collection anti-backflow valve device and blood taking needle |
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| CN201810248418.2A CN108324291B (en) | 2018-03-24 | 2018-03-24 | Blood sample collection anti-backflow valve device and blood taking needle |
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| CN108324291A CN108324291A (en) | 2018-07-27 |
| CN108324291B true CN108324291B (en) | 2023-12-22 |
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| CN201810248418.2A Active CN108324291B (en) | 2018-03-24 | 2018-03-24 | Blood sample collection anti-backflow valve device and blood taking needle |
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| CN109513072A (en) * | 2019-01-21 | 2019-03-26 | 刘贞宽 | Anti- acupuncture needle header structure and needling prevention injector |
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