CN206792461U - Safety-type medical trocar and intravenous infusion needle with position limiting structure - Google Patents
Safety-type medical trocar and intravenous infusion needle with position limiting structure Download PDFInfo
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- CN206792461U CN206792461U CN201621017071.3U CN201621017071U CN206792461U CN 206792461 U CN206792461 U CN 206792461U CN 201621017071 U CN201621017071 U CN 201621017071U CN 206792461 U CN206792461 U CN 206792461U
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Abstract
The utility model discloses a kind of safety-type medical trocar and intravenous infusion needle 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.Medical trocar of the present utility model 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 utility model is related to medical instruments field, safety-type medical trocar more particularly to position limiting structure and
Intravenous infusion needle.
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,
See blood back and infused after confirming to puncture successfully.During the entire process of transfusion, draw point stay in always it is intravascular, but by
Very sharp keen in the needle point of draw point, patient unfolds limbs in transfusion, and it is very big to be punctured the probability of blood vessel by draw point, especially to youngster
Virgin and mental 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
The draw point of blood 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.
Utility model content
The purpose of this utility model is to provide medical sleeve pipe that is a kind of easy to use and can significantly lowering infection risk
Pin.
In the utility model first aspect, there is provided a kind of safety-type medical trocar with position limiting structure, the sleeve pipe
Pin 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
It is seated in the inlying catheter；And under the indwelling state, described puncture needle is seated in the catheter block, wherein
The needle point of the 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
The needle stand is blocked when the needle stand pumpback is 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 as to
So that 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,
It is spacing so as to realize.
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 straight without the puncture needle
Connect and 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,
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 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 is located at institute
The needle handle connecting portion between needle handle Handheld Division and the detachable part is stated, wherein the front end of described detachable part connects with the needle stand
Connect, 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 the raised phase with groove
Mutually 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 is tied by the depression
The mutual cooperation of structure and 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 phase interworking with groove
Close and 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 that matches with the sunk structure, the pumpback part by the sunk structure with it is convex
The mutual cooperation of bar carries 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, mutual cooperation that the pumpback part passes through the sunk structure and raised line
Carry out 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), its inner surface
For 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, institute
It is the second lug boss to state the 3rd position.
The utility model second aspect provides a kind of safe intravenous infusion needle, and the transfusion needle includes inlying catheter, led
Base, 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
's；
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 needle stand is blocked when the needle stand pumpback is to precalculated position.
In the utility model third aspect, 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 is worn
Thorn；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
Puncture 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.
The utility model fourth aspect provides a kind of trochar infusion method, including step：
(a1) trochar described in the utility model first aspect 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.
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 in the scope of the utility model, above-mentioned each technical characteristic of the present utility model and below (strictly according to the facts
Apply example) in specifically describe each technical characteristic between can be combined with each other, so as to form new or preferable technical scheme.
As space is limited, no longer tire out one by one herein and state.
Brief description of the drawings
Fig. 1 is the structural representation of medical trocar in the utility model one embodiment.
Fig. 2 is the structural representation of the needle stand in the utility model one embodiment.
Fig. 3 is the structural representation of the medical trocar in the utility model one embodiment.
Fig. 4 shows the medical trocar in the utility model one embodiment, and wherein Fig. 4 (a) is puncture state, Fig. 4
(b) it is after needle stand pumpback, is changed into the indwelling state from puncture state, Fig. 4 (c) is indwelling state (or when being infused
State), now pumpback part has shirked.
Fig. 5 is the structural representation of the medical trocar in the utility model one embodiment.
Fig. 6 is the structural representation of the needle stand in the utility model one embodiment.
Fig. 7 is the structural representation of the tow sides of the pumpback part in the utility model one embodiment.
Fig. 8 is the structural representation of the safe intravenous infusion needle in the utility model one embodiment.
Fig. 9 uses schematic diagram for the safe intravenous infusion needle in the utility model one embodiment.
Figure 10 is the structural representation of the safe intravenous infusion needle in the utility model one embodiment.
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 puncture state and indwelling state two
Kind state, wherein under puncture state, puncture needle is seated in inlying catheter, in order to puncture；And under indwelling state, institute
The needle point for stating puncture needle is completely retracting in the catheter block.So, in transfusion, puncture needle is remained entirely in catheter block, is disappeared
Except patient is punctured by draw point the risk of blood vessel；After transfusion terminates, the risk that medical worker is accidentally injured and infected is also eliminated.
Simultaneously as the utility model medical trocar has self-cleaning function, the subsequent recovery of medical trocar is also significantly reduced
The risk of processing.The utility model 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 conduit
In seat.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 are all
It is not in contact with the inlying catheter.
Trochar
The utility model provides a kind of medical trocar, and the distinguishing feature of described medical trocar is that puncture needle is
Non- dismountable type, and puncture needle can be fully retracted in catheter block.In addition, the utility model medical trocar is also with spacing
Structure, pin base fastener can make it that in catheter block, while also there is puncture needle self-cleaning function.
Typically, trochar of the present utility model 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
It is seated in the inlying catheter；And under the indwelling state, described puncture needle is seated in the catheter block, wherein
The needle point of the 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
The needle stand is blocked when the needle stand pumpback is to precalculated position.
It should be understood that unlike the prior art, in the utility model, under indwelling state, in described catheter block except
Outside liquid inlet and liquid outlet, isolate with the external world.Under indwelling state, a part of liquid passes through second channel stream
Enter catheter block, a part of liquid is formed in doab and converged by first passage inflow catheter seat (such as near doab)
Stream, tissue (vein of such as people) is then flowed into by inlying catheter.
In the utility model, described trochar can include all types of medical trocars, especially defeated in needs
Enter the medical trocar used when liquid (such as medicine), collection liquid sample (such as blood sample).Representational example includes
(but being 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 pulls back puncture needle, first position limiting structure is combined with second position limiting structure, can be by described
One 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 from conduit
It is drawn out in seat.
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.It is or described first spacing
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 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.
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)
It is not particularly limited, mainly it can realize the pumpback of needle stand, so that trochar is changed into described stay from the puncture state
Configuration state.
In the utility model, the shape of described needle handle Handheld Division is it is not also specifically limited, various routines can be used
Shape, such as flat.Handheld Division can also be the lug boss vertical with catheter block, with suitable for clinically different behaviour
Make gimmick.A kind of preferable needle handle Handheld Division is flat structure.In addition, it can be provided with the outer surface of described needle handle Handheld Division
Salient point, 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 utility model, the inner surface of the catheter block and/or outer surface are provided with pumpback guide structure, Ke Yiyin
Lead the pumpback part and/or needle stand and carry out pumpback, preferably described pumpback is pumpback without spin.The pumpback guide structure
It can be arranged on 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 entered by the raised mutual cooperation with groove
Row 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 phase interworking with groove
Close and 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 utility model, a major function of needle stand is for fixed described puncture needle, so as to be returned when needle stand
When taking out, puncture needle is driven to be fully retracted in catheter block.Another major function of needle stand be to provide circulate for liquid two or
Multiple passages, wherein at least including first passage (by the first through hole on needle stand and puncture needle inner channel-shaped into) and second
Passage (is formed) by second through hole.Another major function of needle stand is that transfusion is sealed in catheter block.
Because trochar of the present utility model (including transfusion needle) is provided with two or more passages, therefore, the utility model
Transfusion speed be more than speed in conventional infusion when only being infused by puncture needle internal channel.
In the utility model, a kind of preferable needle stand includes head portion, center section and the tail end being sequentially connected
Point；Wherein, the outer surface of the end section is provided with first position and second position, and the end section tightens fitting
There is the detachable part, the front end of the detachable part is provided with the 3rd position；3rd position matches with the first position,
3rd position is engaged with the first position so that the 3rd position is bonded with the close clamping of the end section；
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 can
Pumpback is carried out by the pumpback part.
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 utility model, the specification of the puncture needle is not particularly limited, the external diameter of representative puncture needle (or rule
Lattice) it 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 utility model, the size of the catheter block is not particularly limited, but it should being enough to accommodate puncture needle, i.e.,
The length of catheter block 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 is 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 utility model, the internal diameter of catheter block is slightly larger than puncture needle
External diameter.Generally, the internal diameter of catheter block is 0.2-2cm, preferably 0.3-1.5cm, more preferably 0.4-1.0cm.Catheter block
Wall thickness is not particularly limited, usually 0.02-8mm, preferably 0.1-5mm.
In the utility model, the material of the catheter block is not particularly limited, usually plastics, especially hard
Plastic material.In addition, catheter block is preferably transparence or nontransparent shape or partially transparent shape, to observe blood back and transfusion
Situations such as.
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 trochar of the present utility model, one or more infusion vessels can be accessed in rear end.For example,
Multiple infusion vessels can be connected by Y-shaped joint and extension tube with the utility model trochar, so as to simultaneously or first laggard
Row transfusion.
In the utility model, under indwelling state, the needle point face inlying catheter of the puncture needle in catheter block
Liquid inlet, and a transfusion doab is formd between puncture needle needle point and the liquid inlet of inlying catheter.In the remittance
Area is flowed, flows out the liquid (i.e. from first passage) and the liquid from the outflow of the second through hole (i.e. from second channel) from puncture needle
Body, which is formed, to conflux, and enters inlying catheter.Due to the increase of doab flow rate of liquid, therefore the cleaning to puncture needle needle point is (from clearly
Wash) it is better, so as to greatly reduce the risk of the subsequent recovery of medical trocar processing.
Intravenous infusion needle
The utility model additionally 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
's；
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 needle stand is blocked when the needle stand pumpback is to precalculated position.
Piercing method
The utility model additionally provides a kind of trocar puncturing method, including step：
(a) trochar of the present utility model 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 is worn
Thorn；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
Puncture 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 utility model, the medical equipment that can be connected with the utility model trochar does not limit, representative
Medical equipment be selected from the group：Infusion vessel, pressure sensor or its combination.
Infusion method
The utility model additionally provides a kind of trochar infusion method, including step：
(a1) trochar of the present utility model 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 utility model, 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 utility model, 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 utility model method is infused is not particularly limited, including any
With medical and/or medicinal liquid, physiological saline, the glucose solution of medicine such as can be added or is not added with.
Major advantage of the present utility model includes：
(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 can be buckled in first position limiting structure in second position limiting structure so as to permanent domicile
State 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 disease
The puncture needle of human blood is exposed outside, so as to cause the accidental injury of medical personnel and patient and infection, is provided for health care workers
The working environment of one 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, is infused to the catheter block
When synchronous cleaning puncture needle (including inner chamber and outer surface).So, after transfusion terminates, puncture needle and catheter block are all very dry
Only, so as to greatly reduce the subsequent recovery of medical trocar processing risk；
(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 utility model is expanded on further.It should be understood that these embodiments are merely to illustrate
The utility model rather than limitation the scope of the utility model.The experimental method of unreceipted actual conditions in the following example,
Generally according to normal condition, or according to the condition proposed by manufacturer.Unless otherwise indicated, otherwise percentage and number are
Percentage by weight and parts by weight.
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 and another entity or operate, and not necessarily requires or secretly
Show between these entities or operation any this actual relation or order be present.Moreover, term " comprising ", "comprising" or
Any other variant thereof is intended to cover non-exclusive inclusion by person, so that process, method, thing including a series of elements
Product or equipment not only include those key elements, but also the other element including being not expressly set out, or it is this also to include
Kind of process, method, article or the intrinsic key element of equipment.In the absence of more restrictions, by sentence " including one "
The key element of restriction, it is not excluded that in addition identical in the process including the key element, method, article or equipment also be present
Key element.
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
Interconnected 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
The needle point of pin 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 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 be by the pumpback of needle stand 3 to the rear portion of the catheter block 1 so that
4 whole pumpbacks of puncture needle are to the position inside 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 conduit
Seat 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
It is seated in the inlying catheter；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 is seated in the catheter block, 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.
The afterbody of the catheter block 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.
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
Interconnected hollow structure.
Described sleeve pipe pin includes puncture state and indwelling state；Under the puncture state, described puncture needle 4 is put
In the inlying catheter 2；Described trochar is changed into described stay by the pumpback of the needle stand 3 from the puncture state
Configuration state.Under the indwelling state, described puncture needle 4 is seated in the catheter block 1, wherein the pin of the puncture needle 4
Point 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, from
And described sleeve pipe pin is caused to be 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
Needle handle connecting portion 8 between detachable part 7, wherein the front end of described detachable part 7 is connected with the needle stand 3, and it can drive described
Needle stand 3 carry out pull.
The inner surface of the catheter block 1 and outer surface are provided with pumpback guide structure, for guiding the He of pumpback part 5
Needle stand 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
Interconnected 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
It is interior, wherein the needle point of the puncture needle 4 is completely retracting in the catheter block 1, and do not contacted (such as with the inlying catheter 2
Shown in Fig. 4 (b)).
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, from
And described sleeve pipe pin is caused to be 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 held positioned at the needle handle
Needle handle connecting portion 8 between portion 6 and the detachable part 7, wherein the front end of described detachable part 7 is connected with the needle stand 3, and
Described needle stand 3 can be driven to 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
Needle 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 is from the needle stand 3
Split away off (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 extension tube 16 1
End connects with the needle stand 3, and the other end is used to be infused to the needle stand 3, the external Y-shaped joint of extension tube 16
17 are infused.
In the present embodiment, described sleeve pipe pin is additionally provided with fin 9, and the fin 9 is positioned close to the head of the catheter block 1
At end and the fin 9 tightly blocks 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
First position 13 is stated to match, the 3rd position 25 be engaged with the first position 13 so that the 3rd position 25 with
12 close clamping of the end section fitting；The first edge 26 at the 3rd position 25 and the second of the second position 24
Edge 27 is mutually brought into close contact so that the needle stand 3 can carry out institute in pumpback, such as the present embodiment by the pumpback part
It is the first depressed part to state first position 13, and the second position 24 is the first lug boss, and the 3rd position 25 is second raised
Portion；
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
Pin 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
's.
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
The needle stand is blocked when the needle stand pumpback is 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 spacing knot
Structure 9c end matches, and the second neck 10c is combined with the end of the position limiting structure 9c, for will be described spacing
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 pin
In seat 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 into one the safe intravenous infusion needle of the present embodiment
Step has carried out following improvement：
(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 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, increased
Liquid feeding 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
The second neck 10c, pin wing 6c also can shirk from the first neck 8c, and puncture needle 3c now returns to catheter block 2c
It is internal, it can be ensured that in infusion process, puncture needle will not puncture blood vessel, and transfusion is extracted intravenous infusion needle after terminating, now punctured
For pin 3c still in catheter block 2c, following through hole (being not drawn into figure) and puncture needle 3c form the conducting in different transfusion directions
Structure, transfusion operation is carried out to inlying catheter 1c, can avoid whole liquid being delivered to inlying catheter by single direction
1c, add flow rate of liquid.
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 utility model refers to, just as each document
It is individually recited as with reference to such.In addition, it is to be understood that after above-mentioned instruction content of the present utility model has been read, ability
Field technique personnel can make various changes or modifications to the utility model, and these equivalent form of values equally fall within the appended power of the application
Sharp claim limited range.
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 |
|---|---|---|---|
| CN201621017071.3U CN206792461U (en) | 2016-08-31 | 2016-08-31 | Safety-type medical trocar and intravenous infusion needle with position limiting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621017071.3U CN206792461U (en) | 2016-08-31 | 2016-08-31 | Safety-type medical trocar and intravenous infusion needle with position limiting structure |
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| Publication Number | Publication Date |
|---|---|
| CN206792461U true CN206792461U (en) | 2017-12-26 |
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ID=60727900
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621017071.3U Active CN206792461U (en) | 2016-08-31 | 2016-08-31 | Safety-type medical trocar and intravenous infusion needle with position limiting structure |
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| CN (1) | CN206792461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789040A (en) * | 2016-08-31 | 2018-03-13 | 江苏阳普医疗科技有限公司 | A kind of safety-type medical trocar with position limiting structure |
| CN113289137A (en) * | 2021-05-24 | 2021-08-24 | 申晨 | Implantable medical device based on self-sealing plug structure |
-
2016
- 2016-08-31 CN CN201621017071.3U patent/CN206792461U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107789040A (en) * | 2016-08-31 | 2018-03-13 | 江苏阳普医疗科技有限公司 | A kind of safety-type medical trocar with position limiting structure |
| CN107789040B (en) * | 2016-08-31 | 2024-01-16 | 上海长征医院 | Safe medical trocar with limit structure |
| CN113289137A (en) * | 2021-05-24 | 2021-08-24 | 申晨 | Implantable medical device based on self-sealing plug structure |
| CN113289137B (en) * | 2021-05-24 | 2022-10-18 | 枣庄市肿瘤医院(枣庄市胸科医院) | Implantable medical device based on self-sealing plug structure |
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