CN107789040A - A kind of safety-type medical trocar with position limiting structure - Google Patents
A kind of safety-type medical trocar with position limiting structure Download PDFInfo
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- CN107789040A CN107789040A CN201610799338.7A CN201610799338A CN107789040A CN 107789040 A CN107789040 A CN 107789040A CN 201610799338 A CN201610799338 A CN 201610799338A CN 107789040 A CN107789040 A CN 107789040A
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- needle stand
- catheter
- pumpback
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- 239000007788 liquid Substances 0.000 claims description 39
- 238000001802 infusion Methods 0.000 claims description 34
- 238000001990 intravenous administration Methods 0.000 claims description 18
- 230000009466 transformation Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 abstract description 4
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 28
- 239000008280 blood Substances 0.000 description 14
- 210000004369 blood Anatomy 0.000 description 14
- 238000007789 sealing Methods 0.000 description 8
- 210000004204 blood vessel Anatomy 0.000 description 7
- 238000010276 construction Methods 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 208000015181 infectious disease Diseases 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- 208000012260 Accidental injury Diseases 0.000 description 2
- 230000000994 depressogenic effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000005036 nerve Anatomy 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- BYACHAOCSIPLCM-UHFFFAOYSA-N 2-[2-[bis(2-hydroxyethyl)amino]ethyl-(2-hydroxyethyl)amino]ethanol Chemical compound OCCN(CCO)CCN(CCO)CCO BYACHAOCSIPLCM-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
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Classifications
-
- 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
-
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- 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
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B2017/3454—Details of tips
- A61B2017/346—Details of tips with wings
-
- 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
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1587—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body suitable for being connected to an infusion line after insertion into a patient
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- Surgery (AREA)
- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Gastroenterology & Hepatology (AREA)
- Pathology (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a kind of safety-type medical trocar with position limiting structure, the trochar includes：Catheter block, inlying catheter, needle stand and puncture needle.Needle stand is fixed in puncture needle one end, and puncture needle and needle stand are interconnected hollow structure；Wherein, trochar includes puncture state and indwelling state；Under puncture state, puncture needle is seated in inlying catheter；And under indwelling state, puncture needle is seated in catheter block；Also, trochar is changed into indwelling state by the pumpback to needle stand from puncture state；Hub outer surface is provided with the first position limiting structure；And the afterbody of catheter block is provided with the second position limiting structure to match with the first position limiting structure, so that blocking needle stand during needle stand pumpback to precalculated position.The medical trocar of the present invention not only can effectively prevent from accidentally injuring, and significantly reduce the risk of the subsequent recovery processing of medical trocar.
Description
Technical field
The present invention relates to medical instruments field, more particularly to a kind of safety-type medical trocar with position limiting structure.
Background technology
Clinically, medical trocar is a kind of widely used medicine equipment.Using conventional disposable venous infusion needle as
Example, it is mainly made up of helmet, draw point, needle stand, the pin wing and connecting tube.
In use, medical personnel first remove the helmet covered on draw point, vein blood vessel puncture then is carried out using draw point, is seen
Blood back is simultaneously infused after confirming to puncture successfully.During the entire process of transfusion, draw point stay in always it is intravascular, yet with steel
The needle point of pin is very sharp keen, and patient unfolds limbs in transfusion, and it is very big to be punctured the probability of blood vessel by draw point, especially to children and essence
Refreshing patient.
In addition, transfusion needle, after infusion-completed, medical personnel extract draw point from the vein blood vessel of human body out, speckle with patient's blood
The draw point of liquid is exposed outside, easily causes the accidental injury and infection of medical personnel and patient.
In addition, when post-processing hospital refuse, also presence causes the infected risk of operating personnel to draw point.
Therefore, there is an urgent need to develop medical trocar that is easy to use and can significantly lowering infection risk for this area.
The content of the invention
It is an object of the invention to provide a kind of easy to use and can significantly lower the medical trocar of infection risk.
In first aspect present invention, there is provided a kind of safety-type medical trocar with position limiting structure, the trochar bag
Include：
One catheter block；
One inlying catheter, the inlying catheter are arranged at the front end of the catheter block；
One needle stand, the needle stand are located inside the catheter block；With
One puncture needle, described needle stand is fixed in described puncture needle one end, and the puncture needle is mutually to interconnect with needle stand
Logical hollow structure；
Wherein, described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle is put
It is placed in the inlying catheter；And under the indwelling state, described puncture needle is seated in the catheter block, wherein described
The needle point of puncture needle is completely retracting in the catheter block, and is not contacted with the inlying catheter.
Also, described trochar is changed into the indwelling shape by the pumpback to the needle stand from the puncture state
State.
The hub outer surface is provided with the first position limiting structure.And
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that institute
The needle stand is blocked when stating needle stand pumpback to precalculated position.
In another preference, described trochar includes intravenous infusion needle, arterial puncture needle and nerve block pin.
In another preference, the precalculated position include by the needle stand pumpback to the rear portion of the catheter block so that
Obtain the position inside the puncture needle whole pumpback to the catheter block.
In another preference, the first described position limiting structure is annular projection.
In another preference, the second described position limiting structure is annular groove.
In another preference, first position limiting structure is projection, and second position limiting structure is depression.
In another preference, first position limiting structure is depression, and second position limiting structure is projection.
In another preference, the first described position limiting structure and/or the second position limiting structure are elastic structure.
In another preference, the first described position limiting structure includes a spring, and the use being arranged on the needle stand
In the spring eye for accommodating the spring；
Also, when the needle stand is moved to precalculated position, the spring extends and enters second position limiting structure, from
And realize spacing.
In another preference, described sleeve pipe pin is additionally provided with fin, and the fin is positioned close to the head of the catheter block
At end and the fin tightly blocks the catheter block；And/or
Described sleeve pipe pin is additionally provided with helmet, and the helmet is enclosed on the outside of the inlying catheter.
In another preference, the fin and the catheter block are structure as a whole.
In another preference, the external diameter of the puncture needle is 15G-30G, preferably 18G, 20G, 22G, 24G, 26G,
28G。
In another preference, the length of the inlying catheter is 1.0-15.0cm, preferably 1.5-5.0cm, more preferably
1.5cm-3cm。
In another preference, the catheter block is transparence or nontransparent shape or partially transparent shape.
In another preference, the needle stand is provided with the first through hole being connected with the internal channel of the puncture needle；
The second through hole is additionally provided with the needle stand, second through hole is used for liquid is direct without the puncture needle
Import inside the catheter block；
Wherein, under indwelling state, the first through hole and the second through hole form the conducting structure flowed for liquid.
In another preference, the quantity of the second described through hole is n, and the n is 1-20 positive integers.
In another preference, the n is 1,2,3,4,5,6,7,8,9 or 10.
In another preference, the structure of second through hole may be the same or different.
In another preference, opening of second through hole in catheter block is front opening (i.e. towards inlying catheter).
In another preference, opening of second through hole in catheter block be lateral opening (i.e. with catheter block
Mandrel shape forms an angle (such as 60 ° -120 °)).
In another preference, internal channel and the first through hole of the puncture needle form the first passage flowed for liquid.
In another preference, described sleeve pipe pin also includes extension tube；
Also, described extension tube one end connects with the needle stand, the other end is used to be infused to the needle stand.
In another preference, described sleeve pipe pin also includes pumpback part, for driving described needle stand to carry out pull, from
And described sleeve pipe pin is caused to be changed into the indwelling state from the puncture state；And
The inner surface of the catheter block and/or outer surface are provided with pumpback guide structure, for guide the pumpback part and/
Or needle stand guides pumpback.
In another preference, described pumpback part is the pin wing.
In another preference, described pumpback is pumpback without spin.
In another preference, described pumpback part includes needle handle Handheld Division, detachable part and optional positioned at described
Needle handle connecting portion between needle handle Handheld Division and the detachable part, wherein the front end of described detachable part is connected with the needle stand,
And described needle stand can be driven to carry out pull.
In another preference, the needle handle Handheld Division of the pumpback part is additionally provided with the projection for guiding pumpback, described
The outer surface of catheter block is provided with the groove to match with the projection, and the pumpback part passes through described raised mutual with groove
Coordinate and carry out pumpback.
In another preference, the needle handle Handheld Division of the pumpback part is additionally provided with the sunk structure for guiding pumpback,
The outer surface of the catheter block is provided with the raised line to match with the sunk structure, and the pumpback part passes through the sunk structure
Mutual cooperation with raised line carries out pumpback.
In another preference, the detachable part of the pumpback part is additionally provided with the projection for guiding pumpback, the conduit
The inner surface of seat is provided with the groove to match with the projection, and the pumpback part passes through the raised mutual cooperation with groove
Carry out pumpback.
In another preference, the detachable part of the pumpback part is provided with the sunk structure for being used for guiding pumpback, described to lead
The inner surface of base is provided with the raised line to match with the sunk structure, and the pumpback part passes through the sunk structure and raised line
Mutual cooperation carry out pumpback.
In another preference, the needle stand is additionally provided with the projection for guiding pumpback, and the inner surface of the catheter block is set
There is the groove to match with the projection, the pumpback part carries out pumpback by the raised mutual cooperation with groove.
In another preference, the needle stand is provided with the sunk structure for being used for guiding pumpback, the inner surface of the catheter block
Provided with the raised line to match with the sunk structure, the pumpback part is entered by the mutual cooperation of the sunk structure and raised line
Row pumpback.
In another preference, described pumpback part includes needle handle Handheld Division, detachable part and held positioned at the needle handle
Needle handle connecting portion between portion and the detachable part, wherein the front end of described detachable part is connected with the needle stand, and it can drive
Described needle stand carries out pull.
In another preference, described needle handle Handheld Division is flat structure.
In another preference, the outer surface of described needle handle Handheld Division is provided with salient point, is easy to grip to operate.
In another preference, described needle handle Handheld Division is also convenient for carrying out puncture procedure.
In another preference, described detachable part is additionally provided with the observation window construction for observing blood back.
In another preference, described detachable part is arc-shaped structure (such as 60-240 ° of arc structure), and its inner surface is
The depression curved surfaces to match with the external surface shape of needle stand and/or extension tube.
In another preference, described observation window construction is the sight vane for the strip for being arranged at the detachable part.
It is described after described sleeve pipe pin is changed into the indwelling state from the puncture state in another preference
Detachable part departs from described needle stand, so that described pumpback part and described sleeve pipe pin are separately from other sections out.
In another preference, the front end of described detachable part and the tail end of the needle stand intermesh, so that institute
Pumpback part is stated to come off from the needle stand by the detachable part drive needle stand pumpback and the energy pumpback part
Get off.
In another preference, the needle stand includes head portion, center section and the end section being sequentially connected；
Also, the outer surface of the end section is provided with first position and second position, and the end section tightens
The detachable part is fitted with, the front end of the detachable part is provided with the 3rd position；3rd position and the first position phase
Match somebody with somebody, the 3rd position is engaged with the first position so that the 3rd position is pasted with the close clamping of the end section
Close；The second edge of the first edge and the second position at the 3rd position is mutually brought into close contact so that the needle stand energy
It is enough that pumpback is carried out by the pumpback part.
In another preference, the head portion is provided with seal rubber plug, with ensure under indwelling state the needle stand with
Sealing between the catheter block.
In another preference, the outer surface one of the head portion, which is enclosed, is provided with annular groove, in the annular groove
Provided with elastic ring, for realizing the sealing between the needle stand and the catheter block.
In another preference, the first position is the first depressed part, and the second position is the first lug boss, described
3rd position is the second lug boss.
Second aspect of the present invention provides a kind of safe intravenous infusion needle, the transfusion needle include inlying catheter, catheter block,
Puncture needle and needle stand；
Wherein, one end of the inlying catheter is connected to described catheter block, and one end of the puncture needle is connected to described
Needle stand, and the puncture needle and needle stand are interconnected hollow structure, the inlying catheter includes puncture state and indwelling state two
Kind, and indwelling state obtains via the state transformation of puncture；
Under the puncture state, foregoing puncture needle is seated in the inlying catheter and played a supporting role, using wearing
Lancet tip guides the inlying catheter in outside, cooperates and invades in punctured physiological tissue；
Under the indwelling state, described puncture needle is seated in the catheter block；
And the indwelling state, it is after it experienced puncture state, by carrying out pumpback to the needle stand to be formed；
The hub outer surface is provided with the first position limiting structure.And
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that institute
The needle stand is blocked when stating needle stand pumpback to precalculated position.
In third aspect present invention, there is provided a kind of trocar puncturing method, including step：
(a) trochar described in first aspect is provided, described sleeve pipe pin is in puncture state；
(c) using the trochar in the puncturing kit of previous step, the site of puncture of the object to that need to puncture punctures；
With
(d) puncture after confirming successfully, to the progress pumpback operation of the needle stand of described sleeve pipe pin, so that by described sleeve pipe pin from wearing
Thorn-like state is changed into indwelling state；
And methods described also includes step (b)：Described sleeve pipe pin is attached with medical equipment；
Wherein, the step (b) is between step (a) and (c), and/or after step (d).
In another preference, described medical equipment is selected from the group：Infusion vessel, pressure sensor or its combination.
In another preference, the site of puncture includes tissue or blood vessel.
In another preference, the puncture confirms successfully blood back occur including site of puncture.
Fourth aspect present invention provides a kind of trochar infusion method, including step：
(a1) trochar described in first aspect present invention is provided, described sleeve pipe pin is in puncture state；
(b1) optionally described sleeve pipe pin is connected by extension tube with medical use liquid, so as to form infusion set；
(c1) site of puncture for object of infusing is punctured using the trochar in the puncturing kit of previous step；
(d1) puncture after confirming successfully, to the progress pumpback operation of the needle stand of described sleeve pipe pin so that by described sleeve pipe pin from
Puncture state is changed into indwelling state；
(b2) optionally described sleeve pipe pin is connected by extension tube with medical use liquid, so as to form infusion set；
(e1) infused；
Wherein, methods described includes at least one step in step (b1) and (b2).
In another preference, methods described includes (b1) step；Or including (b2) step；Or including (b1) and (b2) step
Suddenly.
In another preference, the site of puncture includes tissue or blood vessel.
In another preference, the puncture confirms successfully blood back occur including site of puncture.
In another preference, the medical use liquid include it is any can be with medical and/or medicinal liquid.
It should be understood that within the scope of the present invention, above-mentioned each technical characteristic of the invention and have in below (eg embodiment)
It can be combined with each other between each technical characteristic of body description, so as to form new or preferable technical scheme.As space is limited, exist
This no longer tires out one by one states.
Brief description of the drawings
Fig. 1 is the structural representation of medical trocar in one embodiment of the invention.
Fig. 2 is the structural representation of the needle stand in one embodiment of the invention.
Fig. 3 is the structural representation of the medical trocar in one embodiment of the invention.
Fig. 4 shows the medical trocar in one embodiment of the invention, and wherein Fig. 4 (a) is puncture state, and Fig. 4 (b) is pin
After seat pumpback, it is changed into the indwelling state from puncture state, Fig. 4 (c) is indwelling state (or state when being infused), this
When pumpback part shirked.
Fig. 5 is the structural representation of the medical trocar in one embodiment of the invention.
Fig. 6 is the structural representation of the needle stand in one embodiment of the invention.
Fig. 7 is the structural representation of the tow sides of the pumpback part in one embodiment of the invention.
Fig. 8 is the structural representation of the safe intravenous infusion needle in one embodiment of the invention.
Fig. 9 uses schematic diagram for the safe intravenous infusion needle in one embodiment of the invention.
Figure 10 is the structural representation of the safe intravenous infusion needle in one embodiment of the invention.
Embodiment
The present inventor by in-depth study extensively, develop first it is a kind of it is with position limiting structure, puncture needle is non-de-
Unload formula and the medical trocar with self-cleaning function, described medical trocar be provided with two kinds of puncture state and indwelling state
State, wherein under puncture state, puncture needle is seated in inlying catheter, in order to puncture；And under indwelling state, it is described to wear
The needle point of pricker is completely retracting in the catheter block.So, in transfusion, puncture needle is remained entirely in catheter block, is eliminated
Patient is punctured the risk of blood vessel by draw point；After transfusion terminates, the risk that medical worker is accidentally injured and infected is also eliminated.Meanwhile
Because medical trocar of the present invention has self-cleaning function, the wind of the subsequent recovery processing of medical trocar is also significantly reduced
Danger.The present invention is completed on this basis.
Term
As used herein, term " puncture needle is seated in catheter block " refers to the entirety of the puncture needle and is placed at catheter block
It is interior.In this state, the needle point of puncture needle is fully withdrawn to catheter block, and the needle body of puncture needle and needle point not with
The inlying catheter is in contact.
Trochar
The invention provides a kind of medical trocar, the distinguishing feature of described medical trocar is that puncture needle shirks to be non-
Formula, and puncture needle can be fully retracted in catheter block.In addition, medical trocar of the present invention also has position limiting structure, can make
Pin base fastener is obtained in catheter block, while also there is puncture needle self-cleaning function.
Typically, trochar of the invention includes：
One catheter block；
One inlying catheter, the inlying catheter are arranged at the front end of the catheter block；
One needle stand, the needle stand are located inside the catheter block；With
One puncture needle, described needle stand is fixed in described puncture needle one end, and the puncture needle is mutually to interconnect with needle stand
Logical hollow structure；
Wherein, described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle is put
It is placed in the inlying catheter；And under the indwelling state, described puncture needle is seated in the catheter block, wherein described
The needle point of puncture needle is completely retracting in the catheter block, and is not contacted with the inlying catheter；
Also, described trochar is changed into the indwelling shape by the pumpback to the needle stand from the puncture state
State；
The hub outer surface is provided with the first position limiting structure；And
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that institute
The needle stand is blocked when stating needle stand pumpback to precalculated position.
It should be understood that unlike the prior art, in the present invention, under indwelling state, except liquid in described catheter block
Outside entrance and liquid outlet, isolate with the external world.Under indwelling state, a part of liquid passes through second channel inflow catheter
Seat, a part of liquid is formed in doab and confluxed by first passage inflow catheter seat (such as near doab), then logical
Cross inlying catheter and flow into tissue (vein of such as people).
In the present invention, described trochar can include all types of medical trocars, especially need to input liquid
The medical trocar used when body (such as medicine), collection liquid sample (such as blood sample).Representational example is included (but simultaneously
It is not limited to)：Intravenous infusion needle, arterial puncture needle and nerve block pin.
In addition, during in order to prevent pumpback, needle stand is pulled out catheter block, preferably provided with corresponding position limiting structure.Another
In preference, the hub outer surface is provided with the first position limiting structure；The afterbody of the catheter block be provided with it is described first spacing
The second position limiting structure that structure matches, so that blocking the needle stand when needle stand pumpback is to precalculated position.So, when
Pumpback part pull back puncture needle when, first position limiting structure is combined with second position limiting structure, can be by described first
Position limiting structure is buckled in second position limiting structure so as to secure the above needle stand, so that needle stand will not be out of catheter block
It is drawn out.
In another preference, first position limiting structure is projection, and second position limiting structure is depression；For example,
The first described position limiting structure is annular projection；And the second position limiting structure is the groove of annular.Or the first spacing knot
Structure is depression, and second position limiting structure is projection.
In addition, the first described position limiting structure and/or the second position limiting structure can also be elastic structure.It is for example, described
The first position limiting structure include a spring, and be arranged on needle stand be used for accommodate the spring eye of the spring；When the pin
When seat is moved to precalculated position, the spring extends and enters the second position limiting structure, spacing so as to realize.
For the ease of the pumpback of needle stand, pumpback part can be preferably provided with, the pumpback part is used to drive described pin
Seat carries out pull, so that described sleeve pipe pin is changed into the indwelling state from the puncture state.
Generally, described pumpback part includes needle handle Handheld Division, detachable part and optional is located at the needle handle Handheld Division
Needle handle connecting portion between the detachable part, wherein the front end of described detachable part is connected with the needle stand, and institute can be driven
The needle stand stated carries out pull.
It is described after described sleeve pipe pin is changed into the indwelling state from the puncture state in another preference
Detachable part departs from described needle stand, so that described pumpback part and described sleeve pipe pin are separately from other sections out.
It should be understood that the structure and shape of pumpback part and its component parts (needle handle Handheld Division, detachable part, connecting portion) do not have
There is special limitation, mainly it can realize the pumpback of needle stand, so that trochar is changed into the indwelling from the puncture state
State.
In the present invention, the shape of described needle handle Handheld Division is it is not also specifically limited, various conventional shapes can be used
Shape, such as flat.Handheld Division can also be the lug boss vertical with catheter block, with suitable for clinically different manipulators
Method.A kind of preferable needle handle Handheld Division is flat structure.In addition, salient point can be provided with the outer surface of described needle handle Handheld Division,
It is easy to grip to operate.
In another preference, the front end of described detachable part and the tail end of the needle stand intermesh, so that institute
Pumpback part is stated to come off from the needle stand by the detachable part drive needle stand pumpback and the energy pumpback part
Get off.
In the present invention, the inner surface of the catheter block and/or outer surface are provided with pumpback guide structure, can guide described
Pumpback part and/or needle stand carry out pumpback, and preferably described pumpback is pumpback without spin.The pumpback guide structure can be set
Inside catheter block, on needle handle Handheld Division, detachable part, and/or needle stand.
Preferably, the needle handle Handheld Division of the pumpback part is additionally provided with the projection for guiding pumpback, the catheter block
Outer surface is provided with the groove to match with the projection, and the pumpback part is carried out by the raised mutual cooperation with groove
Pumpback.
In another preference, the detachable part of the pumpback part is additionally provided with the projection for guiding pumpback, the conduit
The inner surface of seat is provided with the groove to match with the projection, and the pumpback part passes through the raised mutual cooperation with groove
Carry out pumpback.
In another preference, the needle stand is additionally provided with the projection for guiding pumpback, and the inner surface of the catheter block is set
There is the groove to match with the projection, the pumpback part carries out pumpback by the raised mutual cooperation with groove.
In the present invention, a major function of needle stand is the puncture needle described for fixation, so that when needle stand pumpback,
Puncture needle is driven to be fully retracted in catheter block.It is logical that another major function of needle stand is to provide two or more that circulate for liquid
Road, wherein at least including first passage (by the first through hole on needle stand and puncture needle inner channel-shaped into) and second channel (by
Second through hole is formed).Another major function of needle stand is that transfusion is sealed in catheter block.
Because the trochar (including transfusion needle) of the present invention is provided with two or more passages, therefore, transfusion of the invention speed
Degree is more than speed when only being infused in conventional infusion by puncture needle internal channel.
In the present invention, a kind of preferable needle stand includes head portion, center section and the end section being sequentially connected；Its
In, the outer surface of the end section is provided with first position and second position, and the end section tighten be fitted with it is described
Detachable part, the front end of the detachable part are provided with the 3rd position；3rd position matches with the first position, and the described 3rd
Position is engaged with the first position so that the 3rd position is bonded with the close clamping of the end section；Described 3rd
The second edge of the first edge and the second position of position is mutually brought into close contact so that the needle stand can be by the pumpback portion
Part carries out pumpback.
Preferably, the circle of outer surface one of the head portion is provided with annular groove, and elasticity is provided with the annular groove
Circle, for realizing the sealing between the needle stand and the catheter block.Or the head portion is provided with seal rubber plug,
To ensure the sealing under indwelling state between the needle stand and the catheter block.
In another preference, described sleeve pipe pin is additionally provided with fin, and the fin is positioned close to the head of the catheter block
At end and the fin tightly blocks the catheter block；And/or
Described sleeve pipe pin is additionally provided with helmet, and the helmet is enclosed on the outside of the inlying catheter.
In the present invention, the specification of the puncture needle is not particularly limited, and the external diameter (or specification) of representative puncture needle is
15G-30G, preferably 18G, 20G, 22G, 24G, 26G, 28G.
In another preference, the length of the inlying catheter is not particularly limited, and generally it depends on answering for trochar
Use occasion.Typically, the length of inlying catheter is 1.0-15.0cm, preferably 1.5-5.0cm, more preferably 1.5cm-3cm.
In the present invention, the size of the catheter block is not particularly limited, but it should being enough to accommodate puncture needle, i.e. catheter block
Length should be greater than the length of puncture needle.Generally, the ratio between length L2 of the cavity length L1 of catheter block and puncture needle L1/L2 are
1.02-2, preferably 1.05-1.5, more preferably 1.1-1.4.Typically, when catheter block length or its cavity length are 1-15cm,
Preferably 1.5-10cm, more preferably 2-5cm.In the present invention, the internal diameter of catheter block is slightly larger than the external diameter of puncture needle.It is logical
Often, the internal diameter of catheter block is 0.2-2cm, preferably 0.3-1.5cm, more preferably 0.4-1.0cm.The wall thickness of catheter block is without spy
Do not limit, usually 0.02-8mm, preferably 0.1-5mm.
In the present invention, the material of the catheter block is not particularly limited, usually plastics, especially the plastics material of hard
Matter.In addition, catheter block is preferably transparence or nontransparent shape or partially transparent shape, situations such as to observe blood back and transfusion.
In addition, for the ease of observing blood back, can also be in detachable part provided with the observation window construction for being used to observe blood back.
It should be understood that using the trochar of the present invention, one or more infusion vessels can be accessed in rear end.It is for example, multiple
Infusion vessel can be connected by Y-shaped joint and extension tube with trochar of the present invention, so as to be infused simultaneously or successively.
In the present invention, under indwelling state, the liquid of the needle point face inlying catheter of the puncture needle in catheter block
Entrance, and a transfusion doab is formd between puncture needle needle point and the liquid inlet of inlying catheter.In the doab,
The liquid flowed out from puncture needle (i.e. from first passage) is formed with the liquid flowed out from the second through hole (i.e. from second channel)
Conflux, and enter inlying catheter.Because doab flow rate of liquid increases, therefore cleaning (self-cleaning) effect to puncture needle needle point
More preferably, so as to greatly reduce the subsequent recovery of medical trocar processing risk.
Intravenous infusion needle
Present invention also offers a kind of safe intravenous infusion needle, the transfusion needle includes inlying catheter, catheter block, puncture needle
And needle stand；
Wherein, one end of the inlying catheter is connected to described catheter block, and one end of the puncture needle is connected to described
Needle stand, and the puncture needle and needle stand are interconnected hollow structure, the inlying catheter includes puncture state and indwelling state two
Kind, and indwelling state obtains via the state transformation of puncture；
Under the puncture state, foregoing puncture needle is seated in the inlying catheter and played a supporting role, using wearing
Lancet tip guides the inlying catheter in outside, cooperates and invades in punctured physiological tissue；
Under the indwelling state, described puncture needle is seated in the catheter block；
And the indwelling state, it is after it experienced puncture state, by carrying out pumpback to the needle stand to be formed；
The hub outer surface is provided with the first position limiting structure；And
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that institute
The needle stand is blocked when stating needle stand pumpback to precalculated position.
Piercing method
Present invention also offers a kind of trocar puncturing method, including step：
(a) trochar of the present invention is provided, described sleeve pipe pin is in puncture state；
(c) using the trochar in the puncturing kit of previous step, the site of puncture of the object to that need to puncture punctures；
With
(d) puncture after confirming successfully, to the progress pumpback operation of the needle stand of described sleeve pipe pin, so that by described sleeve pipe pin from wearing
Thorn-like state is changed into indwelling state；
And methods described also includes step (b)：Described sleeve pipe pin is attached with medical equipment；
Wherein, the step (b) is between step (a) and (c), and/or after step (d).
In the present invention, the medical equipment that can be connected with trochar of the present invention does not limit, representational medical to set
It is standby to be selected from the group：Infusion vessel, pressure sensor or its combination.
Infusion method
Present invention also offers a kind of trochar infusion method, including step：
(a1) trochar of the present invention is provided, described sleeve pipe pin is in puncture state；
(b1) optionally described sleeve pipe pin is connected by extension tube with medical use liquid, so as to form infusion set；
(c1) site of puncture for object of infusing is punctured using the trochar in the puncturing kit of previous step；
(d1) puncture after confirming successfully, to the progress pumpback operation of the needle stand of described sleeve pipe pin so that by described sleeve pipe pin from
Puncture state is changed into indwelling state；
(b2) optionally described sleeve pipe pin is connected by extension tube with medical use liquid, so as to form infusion set；
(e1) infused；
Wherein, methods described includes at least one step in step (b1) and (b2).
In the present invention, in transfusion, puncture needle, inlying catheter, needle stand and catheter block are integral.
Preferably, the step (d1) includes sub-step：
(d11) puncture after confirming successfully, hand-held pumpback part drives needle stand to slide backwards on tail of the pin base fastener in catheter block
Portion；
(d12) pumpback part is split away off from needle stand.
In the present invention, typical site of puncture includes (but being not limited to)：Tissue or blood vessel.
It should be understood that the medical use liquid that available the inventive method is infused is not particularly limited, including it is any can be with
Medical and/or medicinal liquid, such as add or be not added with physiological saline, the glucose solution of medicine.
Main advantages of the present invention include：
(a) needle stand of described sleeve pipe pin is provided with the first position limiting structure, and the afterbody of the catheter block is provided with and described first
The second position limiting structure that position limiting structure matches, when pumpback part pulls back puncture needle, first position limiting structure and described the
Two position limiting structures are combined, and first position limiting structure can be buckled in second position limiting structure so as to secure the above
Needle stand so that needle stand will not be drawn out out of catheter block and then cause puncture needle still in catheter block, to avoid and speckle with patient
The puncture needle of blood is exposed outside, and so as to cause the accidental injury of medical personnel and patient and infection, one is provided for health care workers
The working environment of individual good safety；
(b) needle stand is provided with the first through hole being connected with the internal channel of the puncture needle, is also set on the needle stand
There is the second through hole, the first through hole and the second through hole form the conducting structure in different transfusion directions under indwelling state, can keep away
Exempt from whole liquid being delivered to inlying catheter by single direction, while increase flow rate of liquid；
(c) inner surface of the catheter block and outer surface are provided with pumpback guide structure, can guide the pumpback part and
Needle stand carries out pumpback, prevents swing offset；
(d) described sleeve pipe pin is provided with pumpback part, and the pumpback part that can be pulled back after puncturing successfully is so that puncture needle returns completely
Retreat to inside the catheter block, it is ensured that syringe needle will not puncture blood vessel during transfusion, alleviate the feared state of mind of patient, infusion process
In, it suitably can unfold limbs, break away from posture stiff during original transfusion, improve security during transfusion；
(e) head portion of the needle stand is provided with seal rubber plug, it is ensured that under indwelling state the needle stand with it is described
Sealing between catheter block；
(f) when described sleeve pipe pin is in indwelling state, the puncture needle is placed in catheter block, when being infused to the catheter block
Synchronous cleaning puncture needle (including inner chamber and outer surface).So, after transfusion terminates, puncture needle and catheter block are all very clean,
So as to greatly reduce the risk of the subsequent recovery of medical trocar processing；
(g) detachable part described in is additionally provided with observation window construction, is easy to observe blood back situation.
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments are merely to illustrate the present invention
Rather than limitation the scope of the present invention.The experimental method of unreceipted actual conditions in the following example, generally according to conventional strip
Part, or according to the condition proposed by manufacturer.Unless otherwise indicated, otherwise percentage and number are percentage by weight and weight
Number.
It should be noted that in the claim and specification of this patent, such as first and second or the like relation
Term is used merely to make a distinction an entity or operation with another entity or operation, and not necessarily requires or imply
Any this actual relation or order be present between these entities or operation.Moreover, term " comprising ", "comprising" or its
Any other variant is intended to including for nonexcludability so that process, method, article including a series of elements or
Equipment not only includes those key elements, but also the other element including being not expressly set out, or also include for this process,
Method, article or the intrinsic key element of equipment.In the absence of more restrictions, wanted by what sentence " including one " limited
Element, it is not excluded that other identical element in the process including the key element, method, article or equipment also be present.
Embodiment 1
Medical trocar
As shown in figure 1, the medical trocar that the present embodiment has position limiting structure includes：
One catheter block 1；
One inlying catheter 2, the inlying catheter 2 are arranged at the front end of the catheter block 1；
One needle stand 3, the needle stand 3 are located inside the catheter block 1；With
One puncture needle 4, described needle stand 3 is fixed in described one end of puncture needle 4, and the puncture needle 4 and needle stand 3 are phase
Intercommunicated hollow structure.
Wherein, described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle 4
It is seated in the inlying catheter 2；Described trochar is changed into by the pumpback to the needle stand 3 from the puncture state
The indwelling state.Under the indwelling state, described puncture needle 4 is seated in the catheter block 1, wherein the puncture needle
Needle point be completely retracting in the catheter block, and do not contacted with the inlying catheter.
The outer surface of needle stand 3 is provided with the first position limiting structure 14.
The afterbody of the catheter block 1 is provided with the second position limiting structure 15 to match with first position limiting structure 14, so as to
So that the needle stand 3 is blocked when the pumpback of needle stand 3 is to precalculated position.
In the present embodiment, the precalculated position for by the pumpback of needle stand 3 to the rear portion of the catheter block 1 so that institute
State the position inside 4 whole pumpbacks of puncture needle to the catheter block 1.
In the present embodiment, first position limiting structure 14 is projection, and second position limiting structure 15 is depression.
In the present embodiment, the external diameter of the puncture needle 4 is 28G, and the length of the inlying catheter 2 is 3cm, the catheter block
1 is transparence.
Embodiment 2
Needle stand and medical trocar
Present embodiment describes a kind of preferable needle stand and the medical trocar using the needle stand.
Similar to Example 1, the present embodiment uses the medical trocar with needle stand shown in Fig. 2, including：
One catheter block；
One inlying catheter, the inlying catheter are arranged at the front end of the catheter block；
One needle stand 3, the needle stand 3 are located inside the catheter block；With
One puncture needle, described needle stand 3 is fixed in described puncture needle one end, and the puncture needle and needle stand 3 are mutual
The hollow structure of connection.
Wherein, described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle is put
It is placed in the inlying catheter；Described trochar is changed into described by the pumpback to the needle stand 3 from the puncture state
Indwelling state.Under the indwelling state, described puncture needle is seated in the catheter block, wherein the needle point of the puncture needle
It is completely retracting in the catheter block, and is not contacted with the inlying catheter.
The outer surface of needle stand 3 is provided with the first position limiting structure.
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that institute
The needle stand 3 is blocked when stating the pumpback of needle stand 3 to precalculated position.
As shown in Fig. 2 the needle stand 3 is provided with the first through hole 21 being connected with the internal channel of the puncture needle.It is described to wear
The internal channel of pricker forms the first passage flowed for liquid with first through hole 21.
In addition, being additionally provided with the second through hole 22 on the needle stand 3, second through hole 22 is used for liquid without puncture needle
And it is introduced directly into inside catheter block.
Under indwelling state, the through hole 22 of first through hole 21 and second forms the conducting structure flowed for liquid.
In the present embodiment, the quantity of the second described through hole 22 is 2 (can also be 3 or 4 or more).In addition,
Although the structure of second through hole 22 is identical, the structure of the second through hole 22 also can be different.
Opening of second through hole 22 in catheter block is towards inlying catheter.
Embodiment 3
Medical trocar
As shown in figure 3, present embodiments providing a kind of medical trocar with position limiting structure, the trochar includes：
One catheter block 1；
One inlying catheter 2, the inlying catheter 2 are arranged at the front end of the catheter block 1；
One needle stand 3, the needle stand 3 are located inside the catheter block 1；With
One puncture needle 4, described needle stand 3 is fixed in described one end of puncture needle 4, and the puncture needle 4 and needle stand 3 are phase
Intercommunicated hollow structure.
Described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle 4 is seated in
In the inlying catheter 2；Described trochar is changed into the indwelling by the pumpback of the needle stand 3 from the puncture state
State.Under the indwelling state, described puncture needle 4 is seated in the catheter block 1, wherein the needle point of the puncture needle 4
It is completely retracting in the catheter block 1, and is not contacted with the inlying catheter 2.
The outer surface of needle stand 3 is provided with the first position limiting structure.
The afterbody of the catheter block 1 is provided with the second position limiting structure to match with first position limiting structure, so that
The needle stand 3 is blocked when the pumpback of needle stand 3 is to precalculated position.
In the present embodiment, described sleeve pipe pin also includes pumpback part 5, for driving described needle stand 3 to carry out pull, so as to
So that described sleeve pipe pin is changed into the indwelling state from the puncture state.
Described pumpback part 5 includes needle handle Handheld Division 6, detachable part 7 and positioned at the needle handle Handheld Division 6 and described de-
The needle handle connecting portion 8 between portion 7 is unloaded, wherein the front end of described detachable part 7 is connected with the needle stand 3, and can be driven described
Needle stand 3 carries out pull.
The inner surface of the catheter block 1 and outer surface are provided with pumpback guide structure, for guiding the pumpback part 5 and pin
Seat 3 carries out pumpback, and described pumpback is pumpback without spin.
The needle handle Handheld Division 6 of the pumpback part 5 is additionally provided with the projection 18 for guiding pumpback, the catheter block 1 it is outer
Surface is provided with mutual with groove 19 by described raised 18 with described raised 18 grooves 19 to match, the pumpback part 5
Coordinate and carry out pumpback.
The detachable part 7 of the pumpback part 5 is provided with the sunk structure for being used for guiding pumpback, the inner surface of the catheter block 1
Provided with the raised line to match with the sunk structure, mutual cooperation that the pumpback part 5 passes through the sunk structure and raised line
Carry out pumpback.
Embodiment 4
Medical trocar
As illustrated in figures 4-5, the trochar with position limiting structure of the present embodiment includes：
One catheter block 1；
One inlying catheter 2, the inlying catheter 2 are arranged at the front end of the catheter block 1；
One needle stand 3, the needle stand 3 are located inside the catheter block 1；With
One puncture needle 4, described needle stand 3 is fixed in described one end of puncture needle 4, and the puncture needle 4 and needle stand 3 are phase
Intercommunicated hollow structure.
Wherein, described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle 4
It is seated in the inlying catheter 2 (shown in such as Fig. 4 (a))；Described trochar is by the pumpback to the needle stand 3, from described
Puncture state is changed into the indwelling state.Under the indwelling state, described puncture needle 4 is seated in the catheter block 1,
The needle point of wherein described puncture needle 4 is completely retracting in the catheter block 1, and does not contact (such as Fig. 4 with the inlying catheter 2
(b) shown in).
The outer surface of needle stand 3 is provided with the first position limiting structure.
The afterbody of the catheter block 1 is provided with the second position limiting structure to match with first position limiting structure, so that
The needle stand 3 is blocked when the pumpback of needle stand 3 is to precalculated position.
In the present embodiment, described sleeve pipe pin also includes pumpback part 5, for driving described needle stand 3 to carry out pull, so as to
So that described sleeve pipe pin is changed into the indwelling state from the puncture state.
In the present embodiment, described pumpback part 5 includes needle handle Handheld Division 6, detachable part 7 and positioned at the needle handle Handheld Division
Needle handle connecting portion 8 between 6 and the detachable part 7, wherein the front end of described detachable part 7 is connected with the needle stand 3, and can band
Move described needle stand 3 and carry out pull.
In the present embodiment, described pumpback part 5 is the pin wing, and described needle handle Handheld Division 6 is flat structure, described pin
Handle Handheld Division 6 is also convenient for carrying out puncture procedure.
In the present embodiment, the front end of described detachable part 7 and the tail end of the needle stand 3 intermesh, so that described
Pumpback part 5 drives the pumpback of needle stand 3 by the detachable part 7 and the energy pumpback part 5 takes off from the needle stand 3
Fall (shown in such as Fig. 4 (c)).
When being infused, as shown in figure 5, described sleeve pipe pin also includes extension tube 16, also, the one end of the extension tube 16
Connected with the needle stand 3, the other end is used to be infused to the needle stand 3, and the external Y-shaped joint 17 of extension tube 16 enters
Row transfusion.
In the present embodiment, described sleeve pipe pin is additionally provided with fin 9, and the fin 9 is positioned close to the head end of the catheter block 1
Place and the fin 9 tightly block the catheter block 1.
Embodiment 5
Medical trocar
Present embodiments provide a kind of trochar with position limiting structure, the trochar in the present embodiment is in embodiment 4
Improved on the basis of trochar, mainly theed improvement is that：
As shown in Figure 4, Figure 5, Figure 6 and Figure 7, in the present embodiment, the needle stand 3 include be sequentially connected head portion 10,
Center section 11 and end section 12；
Also, the outer surface of the end section 12 is provided with first position 13 and second position 24, and the tail end
Divide 12 to tighten and be fitted with the detachable part 7, the front end of the detachable part 7 is provided with the 3rd position 25；3rd position 25 and institute
State first position 13 to match, the 3rd position 25 is engaged with the first position 13 so that the 3rd position 25 and institute
State 12 close clamping of end section fitting；The first edge 26 at the 3rd position 25 and the second edge of the second position 24
27 are mutually brought into close contact so that and the needle stand 3 can carry out pumpback by the pumpback part, such as first described in the present embodiment
Position 13 is the first depressed part, and the second position 24 is the first lug boss, and the 3rd position 25 is the second lug boss；
The head portion 10 is provided with seal rubber plug 20, to ensure the needle stand 3 and the catheter block under indwelling state
Sealing between 1；
The outer surface of described needle handle Handheld Division 6 is provided with salient point, is easy to grip to operate；
Described detachable part 7 is additionally provided with the observation window construction 23 for observing blood back, and described observation window construction 23 is
It is arranged at the sight vane of the strip of the detachable part 7.
Embodiment 6
Intravenous infusion needle
A kind of safe intravenous infusion needle is present embodiments provided, the transfusion needle includes inlying catheter, catheter block, puncture needle
And needle stand.
Wherein, one end of the inlying catheter is connected to described catheter block, and one end of the puncture needle is connected to described
Needle stand, and the puncture needle and needle stand are interconnected hollow structure, the inlying catheter includes puncture state and indwelling state two
Kind, and indwelling state obtains via the state transformation of puncture.
Under the puncture state, foregoing puncture needle is seated in the inlying catheter and played a supporting role, using wearing
Lancet tip guides the inlying catheter in outside, cooperates and invades in punctured physiological tissue.
Under the indwelling state, described puncture needle is seated in the catheter block.
And the indwelling state, it is after it experienced puncture state, by carrying out pumpback to the needle stand to be formed.
The hub outer surface is provided with the first position limiting structure.
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that institute
The needle stand is blocked when stating needle stand pumpback to precalculated position.
Embodiment 7
Intravenous transfusion methods
Present embodiments provide a kind of trochar infusion method, including step：
(a1) trochar described in embodiment 1 is provided, described sleeve pipe pin is in puncture state；
(b1) described sleeve pipe pin is connected by extension tube with medical use liquid, so as to form infusion set；
(c1) site of puncture for the object that punctures and infuse is punctured using the trochar in (b1) puncturing kit；
(d1) puncture after confirming successfully, described sleeve pipe pin is adjusted to indwelling state；
(e1) infused.
During transfusion, puncture needle, inlying catheter, needle stand and catheter block are integral.
In the present embodiment, the step (d1) includes sub-step：
(d11) puncture after confirming successfully, hand-held pumpback part drives needle stand to slide backwards on tail of the pin base fastener in catheter block
Portion；
(d12) pumpback part is split away off from needle stand.
In the present embodiment, there is blood back and confirms described puncture successfully in site of puncture.
In the present embodiment, the medical use liquid is medicinal fluid.
Embodiment 8
Intravenous transfusion methods
Present embodiments provide a kind of trochar infusion method, including step：
(a1) trochar described in embodiment 1 is provided, and described sleeve pipe pin is in puncture state；
(c1) site of puncture for the object that punctures and infuse is punctured using the trochar in (a1)；
(d1) puncture after confirming successfully, described sleeve pipe pin is adjusted to indwelling state；
(b2) it is connected by the trochar under indwelling state in (d1) by extension tube with medical use liquid；
(e1) infused.
During transfusion, puncture needle, inlying catheter, needle stand and catheter block are integral.
In the present embodiment, the step (d1) includes sub-step：
(d11) puncture after confirming successfully, hand-held pumpback part drives needle stand to slide backwards on tail of the pin base fastener in catheter block
Portion；
(d12) pumpback part is split away off from needle stand.
Embodiment 9
Safe intravenous infusion needle
As shown in figure 8, present embodiments provide a kind of safe intravenous infusion needle, the transfusion needle include inlying catheter 1c,
Catheter block 2c, puncture needle 3c and needle stand 4c.
Wherein, inlying catheter 1c one end is connected to described catheter block 2c, and one end of the puncture needle 3c is connected to
Described needle stand 4c, and puncture needle 3c and needle stand 4c is interconnected hollow structure, inlying catheter 1c includes puncturing shape
Two kinds of state and indwelling state, and indwelling state obtains via the state transformation of puncture.
Under the puncture state, foregoing puncture needle 3c is seated in the inlying catheter 1c and played a supporting role, profit
The inlying catheter 1c in outside is guide with puncture needle 3c tips, cooperates and invades in punctured physiological tissue.
Under the indwelling state, described puncture needle 3c is seated in the catheter block 2c.
And the indwelling state, be after it experienced puncture state, by the needle stand 4c carry out pumpback operation and
Formed.
In the present embodiment, it correspond to foregoing needle stand 4c and woven hose 5c be set by way of integration.
The catheter block 2c is provided with position limiting structure 9c.
The circle of outer surface one of the needle stand 4c is provided with the second neck 10c, the second neck 10c and the position limiting structure
9c end matches, and the second neck 10c is combined with the end of the position limiting structure 9c, for by the position limiting structure
9c end anchors are in the second neck 10c so as to securing the above needle stand 4c.
The transfusion needle is additionally provided with pin wing 6c, and the pin wing 6c tail ends are provided with buckle, gone back on the outer surface of the needle stand 4c
Provided with the first neck 8c, and the first neck 8c and the pin wing 6c afterbody buckle match, and the first neck 8c is used
In by the trailer card buckle of the pin wing 6c in the first neck 8c.
The pin wing 6c is provided with the first groove 7c, and the first groove 7c and the catheter block 2c side match, institute
State the side that the first groove 7c is used to for the pin wing 6c to be stuck in the catheter block 2c.
In use, as shown in figure 9, by the pin wing 6c toward when pulling back, the puncture needle 3c retracts to the catheter block 2c
It is internal.
In the present embodiment, in use, hand, which pinches pin wing 6c, carries out venipuncture, after seeing blood back and puncturing successfully, the pin wing of pulling back
6c simultaneously promotes inlying catheter 1c simultaneously, puncture needle 3c is fallen back on to catheter block 2c inside, now position limiting structure 9c will block pin
The second neck 10c on seat 4c, fixed needle stand 4c effects are realized, under being shirked naturally from the first neck 8c with hour hands wing 6c
Come, the transfusion conducting structure that liquid is formed by needle stand 4c and puncture needle 3c in following woven hose 5c, enter to inlying catheter 1c
Row transfusion.
In the present embodiment, the circle of outer surface one of the needle stand 4c is provided with to match with the end of the position limiting structure 9c
Second neck 10c, it can be ensured that when rotating needle stand 4c mono- week, the end of the position limiting structure 9c can be buckled in the needle stand
In 4c any one upper second neck 10c of the circle of outer surface one, so that it is guaranteed that needle stand 4c will not be pulled out.
Embodiment 10
Safe intravenous infusion needle
As shown in Figure 10, substantially with embodiment 9, difference is further the safe intravenous infusion needle of the present embodiment
Following improvement is carried out：
(a) outer surface one of the needle stand 4c, which is enclosed, is additionally provided with the second groove (being not drawn into figure), in second groove
Provided with elastic ring 11c, for ensureing the needle stand 4c and the catheter block 2c sealing.
(b) transfusion needle is additionally provided with helmet (being not drawn into figure), and the helmet is arranged on the pipe of the inlying catheter 1c
On mouth.
(c) one end that the needle stand 4c is connected with the puncture needle 3c is puncture needle connection end, in puncture needle 3c connections
End is provided with through hole (being not drawn into figure), and the through hole and puncture needle 3c form the conducting knot in different transfusion directions under indwelling state
Structure, infused to inlying catheter 1c, can avoid whole liquid being delivered to inlying catheter 1c by single direction, increase liquid
Rate of flow of fluid.
(d) at least one hypotenuse is included in the construction of the first neck 8c, for pin wing 6c described in fast-falling.
In the present embodiment, in use, first taking down helmet (being not drawn into figure), puncture needle 3c is punctured to intravascular, puncture
After success, hand pinches pin wing 6c toward pulling back, and when moving certain position to, the position limiting structure 9c on catheter block 2c can be stuck on needle stand 4c
Second neck 10c, pin wing 6c also can be shirked from the first neck 8c, and puncture needle 3c now is returned in catheter block 2c
Portion, it can be ensured that in infusion process, puncture needle will not puncture blood vessel, and transfusion extracts intravenous infusion needle after terminating, now puncture needle
For 3c still in catheter block 2c, following through hole (being not drawn into figure) and puncture needle 3c form the conducting knot in different transfusion directions
Structure, transfusion operation is carried out to inlying catheter 1c, can avoid whole liquid being delivered to inlying catheter 1c by single direction, is increased
Flow rate of liquid is added.
The second groove is may also be further provided with the present embodiment, on the circle of outer surface one of the needle stand 4c (not draw in figure
Go out), second groove is interior to be provided with elastic ring 11c, it is ensured that the needle stand 4c and catheter block 2c sealing.
All it is incorporated as referring in this application in all documents that the present invention refers to, it is independent just as each document
It is incorporated as with reference to such.In addition, it is to be understood that after the above-mentioned instruction content of the present invention has been read, those skilled in the art can
To be made various changes or modifications to the present invention, these equivalent form of values equally fall within the model that the application appended claims are limited
Enclose.
Claims (10)
1. a kind of safety-type medical trocar with position limiting structure, it is characterised in that the trochar includes：
One catheter block；
One inlying catheter, the inlying catheter are arranged at the front end of the catheter block；
One needle stand, the needle stand are located inside the catheter block；With
One puncture needle, described needle stand is fixed in described puncture needle one end, and the puncture needle and needle stand are what is be interconnected
Hollow structure；
Wherein, described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle is seated in
In the inlying catheter；And under the indwelling state, described puncture needle is seated in the catheter block, wherein the puncture
The needle point of pin is completely retracting in the catheter block, and is not contacted with the inlying catheter；
Also, described trochar is changed into the indwelling state by the pumpback to the needle stand from the puncture state；
The hub outer surface is provided with the first position limiting structure；And
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that the pin
The needle stand is blocked during seat pumpback to precalculated position.
2. trochar according to claim 1, it is characterised in that first position limiting structure is projection, second limit
Bit architecture is depression.
3. trochar according to claim 1, it is characterised in that first position limiting structure is depression, second limit
Bit architecture is projection.
4. trochar according to claim 1, it is characterised in that the first described position limiting structure and/or the second spacing knot
Structure is elastic structure.
5. trochar according to claim 1, it is characterised in that the first described position limiting structure includes a spring, and
The spring eye for being used to accommodate the spring being arranged on the needle stand；
Also, when the needle stand is moved to precalculated position, the spring extends and enters second position limiting structure, so as to real
It is existing spacing.
6. trochar according to claim 1, it is characterised in that described sleeve pipe pin is additionally provided with fin, and the fin is set
At the head end close to the catheter block and the fin tightly blocks the catheter block；And/or
Described sleeve pipe pin is additionally provided with helmet, and the helmet is arranged on the mouth of pipe of the inlying catheter.
7. trochar according to claim 1, it is characterised in that the needle stand is provided with the internal channel phase with the puncture needle
The first through hole of connection；
The second through hole is additionally provided with the needle stand, second through hole is used to liquid being introduced directly into without the puncture needle
Inside the catheter block；
Also, under indwelling state, the first through hole and the second through hole form the conducting structure flowed for liquid.
8. trochar according to claim 1, it is characterised in that described sleeve pipe pin also includes pumpback part, for driving
Described needle stand carries out pull, so that described sleeve pipe pin is changed into the indwelling state from the puncture state；And
The inner surface of the catheter block and/or outer surface are provided with pumpback guide structure, for guiding the pumpback part and/or pin
Seat guides pumpback.
9. trochar according to claim 8, it is characterised in that described pumpback part includes needle handle Handheld Division, shirked
Portion and the needle handle connecting portion between the needle handle Handheld Division and the detachable part, wherein the front end of described detachable part and institute
Needle stand connection is stated, and described needle stand can be driven to carry out pull.
10. a kind of safe intravenous infusion needle, it is characterised in that the transfusion needle includes inlying catheter, catheter block, puncture needle and pin
Seat；
Wherein, one end of the inlying catheter is connected to described catheter block, and one end of the puncture needle is connected to described needle stand,
And the puncture needle and needle stand are interconnected hollow structure, the inlying catheter includes two kinds of puncture state and indwelling state, and
Indwelling state obtains via the state transformation of puncture；
Under the puncture state, foregoing puncture needle is seated in the inlying catheter and played a supporting role, and utilizes puncture needle
Tip guides the inlying catheter in outside, cooperates and invades in punctured physiological tissue；
Under the indwelling state, described puncture needle is seated in the catheter block；
And the indwelling state, it is after it experienced puncture state, by carrying out pumpback to the needle stand to be formed；
The hub outer surface is provided with the first position limiting structure；And
The afterbody of the catheter block is provided with the second position limiting structure to match with first position limiting structure, so that the pin
The needle stand is blocked during seat pumpback to precalculated position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610799338.7A CN107789040B (en) | 2016-08-31 | 2016-08-31 | Safe medical trocar with limit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610799338.7A CN107789040B (en) | 2016-08-31 | 2016-08-31 | Safe medical trocar with limit structure |
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| Publication Number | Publication Date |
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| CN107789040A true CN107789040A (en) | 2018-03-13 |
| CN107789040B CN107789040B (en) | 2024-01-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610799338.7A Active CN107789040B (en) | 2016-08-31 | 2016-08-31 | Safe medical trocar with limit structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113289137A (en) * | 2021-05-24 | 2021-08-24 | 申晨 | Implantable medical device based on self-sealing plug structure |
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| Publication number | Publication date |
|---|---|
| CN107789040B (en) | 2024-01-16 |
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