CN208388683U - A kind of blood vessel proximal end protector - Google Patents
A kind of blood vessel proximal end protector Download PDFInfo
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- CN208388683U CN208388683U CN201721026297.4U CN201721026297U CN208388683U CN 208388683 U CN208388683 U CN 208388683U CN 201721026297 U CN201721026297 U CN 201721026297U CN 208388683 U CN208388683 U CN 208388683U
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Abstract
The utility model belongs to field of medical products, provides a kind of blood vessel proximal end protector, comprising: elastic network(s) is the reticular structure of front opening positioned at the front end of blood vessel proximal end protector；Outer sheath, is hollow tubular structure, and front end has the opening entered for the elastic network(s)；Haemostatic valve, front end are connected with the rear end of the outer sheath, and rear end has opening；Middle pipe is hollow tubular structure, is located in the outer sheath, and can automatically move in the outer sheath；The opening of the front end of the middle pipe is connect with the rear end of the elastic network(s)；The middle pipe is inserted in the outer sheath after the haemostatic valve by the opening of the rear end of the haemostatic valve.Blood vessel proximal end provided by the utility model protector can efficiently collect the impurity such as the broken thrombus in blood, and thrombus is conveniently removed in vitro；And it is smooth by incomplete blocking blood flow to can permit blood flow, avoids the generation of ischemic complications.
Description
Technical field
The utility model belongs to field of medical products, in particular to a kind of blood vessel proximal end protector.
Background technique
Carotid artery stenosis refers mainly to arteria carotis communis and Transcranial Doppler and occurs narrow, is to lead to cerebral ischemia, cerebral infarction
The major reason of plug.In the U.S., the attack rate difference of 50~60 years old age bracket and 80 years old or more crowd's carotid artery stenosis (> 50%)
For 0.5% and 10%.In all stroke events, there is 10%-20% to be attributed to internal carotid artery stenosis, cerebral arterial thrombosis accounts for
70%, and hemorrhagic apoplexy accounts for 30%, wherein cerebral infarction accounts for 30%-50% as caused by carotid artery stenosis reason.In China, with
The extensive development of the aging and non-invasive image technology of population, the carotid artery stenosis case of clinical diagnosis greatly increase.
The natural history for having symptom narrow with asymptomatic Carotid differs greatly, and is carried out using accurate, convenient and economic means to it
Identify, to select optimal treatment method to lay a good foundation.
To the operative treatment mode of carotid artery stenosis, there are mainly two types of.Endarterectomy (carotid
Endarterectomy CEA) and carotid stents plasty (carotid artery angioplasty and stenting
CAS).CEA has had the clinical experience in more than 60 years, a kind of method for being proved to be effective treatment carotid artery stenosis, simply
Easy, treatment ratio is more thoroughly.CEA is just always the goldstandard in Carotid Stenosis since before 40 years, but it is current this
Point is just challenged.CAS is the new minimal invasive of one kind, the low invasive interventional therapy carried out nearly ten years, operation effect it is high and
It implements simple.Entire operation time-consuming is not grown, and success rate is more than 98%, minimally invasive with its, quick, curative effect really, it is applied widely,
Price is gradually reduced and is continuously available use, also clinically achieves good curative effect.The first CAS to CREST examination in 1989
It tests result report (2010) and established CAS as the first-line treatment side that can choose in Carotid Stenosis after 20 years
Case.The advantage of CAS operation: the hospital stays is short, especially suitable for patient that is older, being not suitable for major surgery.
Either CEA or CAS can generate a certain amount of thrombus during operation, and clinical data is shown, blood vessel
Each stage of interior operation, including seal wire passes through, the release of predilation, bracket, expansion etc. can all generate thrombus afterwards.If not to blood
Bolt is retained, and is allowed to flow in the blood vessels, it is likely that and it can enter cerebral vessels, the blood flow of cerebral vessels can be blocked when serious,
Brain tissue ischemia is in turn resulted in, the serious consequence that irreversible necrosis occurs for brain tissue ischemia is likely to result in when serious.Therefore,
In carotid artery stenosis art, generally require to use cerebrovascular protector.And it is most effective, surely belong to cerebrovascular proximal end protector,
It can retain thrombus apart from the closer position of operative site.
Currently, the Typical Representative of widely used cerebrovascular proximal end protector is that (MOMA is MOMA arteria carotis protective device
One brand, i.e. MOMA, Invatec, Roncadelle BS, Italy), it can arbitrarily select seal wire and various instruments to cooperate
It uses.However, MOMA discharges sacculus in lesion proximal end, complete blocking blood flow causes distal end blood flow to stagnate.To lesion processing
After using suction catheter by the stagnant blood of distal end clast extract out, then pumpback sacculus restore blood flow.But for a long time
Blocking blood flow be easy to cause patient's cerebral ischemic；Meanwhile not can be carried out angiography during using MOMA, it also limits
The use of MOMA.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of blood vessel proximal end protector,
The blood vessel proximal end protector is particularly suitable for cerebrovascular proximal end protection.
The utility model provides a kind of blood vessel proximal end protector, comprising:
Elastic network(s) is the reticular structure of front opening；
Outer sheath, the outer sheath are hollow tubular structure, and front end has the opening entered for the elastic network(s)；
Haemostatic valve, the front end of the haemostatic valve are connected with the rear end of the outer sheath, and rear end has opening；
Middle pipe, the middle pipe are hollow tubular structure, are partially sheathed in the outer sheath, the front end of the middle pipe
Opening is connect with the rear end of the elastic network(s), and the rear end of the middle pipe is stretched out backward from the open rearward end of the haemostatic valve, institute
State pipe can move freely in the outer sheath；The rear end of the middle pipe of the haemostatic valve is stretched out by pushing forward
Portion makes the elastic network(s) stretch out the outer sheath and in opened condition, or by pull back the stretching haemostatic valve it is described in
The rear end of pipe takes in the elastic network(s) in the outer sheath.
Preferably, the diameter of the elastic network(s) under full open position is greater than the outer diameter of the outer sheath；It is in
The elastic network(s) under full open position is " bowl " shape structure of front opening；The elastic network(s) can be shrunk to diameter and be less than
The cylinder-like structure of the internal diameter of the outer sheath.
Preferably, the mesh size of the elastic network(s) is 50-5000 μm.
Preferably, on the surface of the elastic network(s) be coated with polyurethane film, the polyurethane film with a thickness of 1-200
μm。
Preferably, the aperture size of the polyurethane film is 80-200 μm；Institute at the front end of the elastic network(s)
The aperture size for stating polyurethane film is less than the aperture size of the polyurethane film at the rear end of the elastic network(s).
Preferably, the outer diameter of the outer sheath is 1-6mm；The internal diameter of the middle pipe is 0.5-5mm.
Preferably, tampon is provided in the haemostatic valve, the tampon is flexible laminated structure；It is described to stop
Crack is provided on blood pad, the crack is set as mutually perpendicular two.
Preferably, blood vessel proximal end protector further includes communicating valve, the arrival end of the communicating valve and the middle pipe
Rear end is connected.
Preferably, blood vessel proximal end protector further includes valve, and the input end of the valve passes through conduit and the company
The outlet end of port valve is connected, and outlet end is connected with Biochemical analyzer device.
Preferably, the elastic network(s) is formed using the metal wire knitted of single or more niti-shaped memorial alloy；Or
It is cut by laser using niti-shaped memorial alloy, medical stainless steel or cochrome metal pipe material；Or use NiTi shape
Shape memory alloys metal powder 3D printing forms.
Blood vessel proximal end provided by the utility model protector can efficiently collect the impurity such as the broken thrombus in blood, and will
Thrombus conveniently removes in vitro；And it is smooth by incomplete blocking blood flow to can permit blood flow, avoids ischemic
The generation of complication.
Other feature and advantage of the utility model will be in following specific embodiment part detailed description.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
Fig. 1 is the structural schematic diagram of the blood vessel proximal end protector of the preferred embodiment of the utility model.
Fig. 2 is the structural schematic diagram at the haemostatic valve position of the blood vessel proximal end protector of the preferred embodiment of the utility model.
Fig. 3 is that the structure of the tampon in the haemostatic valve of the blood vessel proximal end protector of the preferred embodiment of the utility model is shown
It is intended to.
Wherein, the reference numerals are as follows in figure:
1- elastic network(s)；2- outer sheath；3- haemostatic valve；It is managed in 4-；5- communicating valve；6- valve；21- external screw thread；Spiral shell in 31-
Line；32- tampon；The crack 321-.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
The embodiment of type is described in further detail.It should be understood that the specific embodiments described herein are only used for
Bright and explanation the utility model, is not intended to limit the utility model.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
In the utility model, unless stated otherwise, term " front end " and " rear end " are the bearing definitions based on attached drawing, tool
Body, when observer faces attached drawing, the left side of sight is defined as " front end ", and the right end of sight is defined as " rear end "；For example,
In Fig. 1, it is known as " front end " towards one end of elastic network(s) 1, is known as " rear end " towards one end of valve 6.
The utility model provides a kind of blood vessel proximal end protector, which is particularly suitable for cerebrovascular
Proximal end protection, such as the cerebrovascular proximal end protection suitable for carotid artery stenosis operation.
In the utility model, term " blood vessel proximal end protector " refer to be placed on when use puncture orifice apart from blood vessel compared with
Closely and be located at blood vessel puncture orifice and operative site between position at vascular protector.
As shown in Figure 1, one embodiment of the utility model provides a kind of blood vessel proximal end protector, including elastic network(s) 1,
Outer sheath 2, haemostatic valve 3 and middle pipe 4.
Elastic network(s) 1 is located at the front end of blood vessel proximal end protector.Elastic network(s) 1 be front opening reticular structure, rear end with
The front end of middle pipe 4 is connected.
Elastic network(s) 1 can be formed using the metal wire knitted of single or more niti-shaped memorial alloy；Or use nickel
The metal pipe materials such as titanium shape memory alloy, medical stainless steel, cochrome are cut by laser；Or use nickel-titanium shape memory
Alloying metal powder 3D printing forms；Accordingly it is also possible to which elastic network(s) 1 is known as the close net of metal.
Elastic network(s) 1 (the close net of metal) is whole soft, has excellent elasticity and supporting role.In fully opening shape
The diameter of elastic network(s) 1 under state (when not by external force) is greater than the outer diameter of outer sheath 2.Bullet under full open position
Property net 1 be front opening " bowl " shape structure, rear end (bottom end of " bowl " shape) is connected (the i.e. bowl of elastic network(s) 1 with the front end of middle pipe 4
The bottom end of shape structure is fixed in the opening of the front end of middle pipe 4).Elastic network(s) 1 can be shrunk to internal diameter of the diameter than outer sheath 2
Small cylindrical shape to can smoothly enter into outer sheath 2 in a contracted state, while keeping cylindric.
The mesh size of elastic network(s) 1 can be 50-5000 μm (0.05-5mm), for example, can for 50,100,200,300,
400、500、600、700、800、900、1000、1200、1400、1500、 1700、1900、2000、2200、2400、2500、
2600,2800,3000,3200,3400,3500,3700,3900,4000,4200,4400,4500,4700,4900 and 5000 μ
The range between any one or two in m, such as can be preferably 500-3600 μm, 500-2000 μm, 600-1200
μm and 2000-2800 μm in any one.
(for example, coating by the way of dipping) one layer of ultra-thin polyurethane film can be coated on the surface of elastic network(s) 1.It is poly-
The thickness of urethane film can be 1-200 μm, for example, can for 1,10,20,30,40,50,60,70,80,90,100,110,
120, any one in 130,140,150,160,170,180,190 and 200 μm or the range between two, preferably 50-
150 μm, further preferred 90-110 μm.Wherein, polyurethane is polymerized by isocyanates (monomer) with hydroxy compounds
High-molecular compound, average molecular weight 100000-1000000.
After coating one layer of ultra-thin polyurethane film on the surface of elastic network(s) 1, it is possible to reduce broken thrombus again results in
Embolism drifts about.Meanwhile after coating one layer of ultra-thin polyurethane film on the surface of elastic network(s) 1, elastic network(s) 1 can be reduced
Mesh size, improve capture of the mesh to thrombus, the adhesive capacity of elastic network(s) 1.Elastic network(s) 1 surface coat one layer it is ultra-thin
After polyurethane film, the mesh size of elastic network(s) 1 can narrow down to 80-200 μm, for example, can for 80,100,120,140,
160, any one in 180 and 200 μm or the range between two, such as can be preferably 50-200 μm, 100-150 μ
M, in 80-150 μm, 90-120 μm and 120-140 μm any one (aperture of i.e. ultra-thin polyurethane film be 80-200 μm,
It such as can be the range between any one or two in 80,100,120,140,160,180 and 200 μm, such as can be with
Any one in preferably 50-200 μm, 100-150 μm, 80-150 μm, 90-120 μm and 120-140 μm).By in bullet
Property net 1 surface coat one layer of ultra-thin polyurethane film so that the mesh on elastic network(s) 1 as much as possible can not only be caught
It obtains, adhere to broken thrombus, while will not influence the normal circulation of blood again；But also elastic network(s) 1 can be reduced to intravascular
The damage of wall.
In a kind of preferred embodiment, the front end of the elastic network(s) 1 of ultra-thin polyurethane film can be coated with
Mesh size at (open end of " bowl " shape) is set smaller than the mesh ruler at the rear end (bottom end of " bowl " shape) of elastic network(s) 1
It is very little.Mesh size is set in this way, can be reduced to the greatest extent when using the blood vessel proximal end protector of the utility model, from close to elasticity
Lesser thrombus is leaked out in mesh at the open end of net 1 so that these leak out thrombus pass through mesh after enter outer sheath 2 with
Space between vascular wall, and as blood flow flows away, to cannot be moved out of external.
Since elastic network(s) 1 is whole soft, there is excellent elasticity and supporting role.Therefore, during elastic network(s) 1 passes through
After pipe 4 is pulled completely into outer sheath 2, elastic network(s) 1 can be close to the inner wall of outer sheath 2, to keep good adherence quality, favorably
It is passed through in broken thrombus.After being released under promotion of the elastic network(s) 1 in middle pipe 4 from the front end of outer sheath 2, it can expand
Expand formed proximal end it is funnel-shaped, distally be in umbrella shape；That is, being protected in the blood vessel proximal end of normal use the utility model
It is funnel-shaped when from the direction of puncture orifice when device, it is in umbrella when from the direction opposite with puncture orifice.
Outer sheath 2 is hollow tubular structure, outer diameter 1-6mm, for example, can for 1,1.5,2,2.5,3,3.5,4,
4.5, any one in 5,5.5 and 6mm or the range between two, preferably 1.6-4.6mm, further preferred 2.3-3.6mm,
To match with the cerebrovascular.
Outer sheath 2 can be made of polytetrafluoroethylene (PTFE) material.The front opening of outer sheath 2, for the entrance of elastic network(s) 1；
Rear end and haemostatic valve 3 connect.
Middle pipe 4 is hollow tubular structure, is partially sheathed in outer sheath 2, and can move automatically in outer sheath 2
It is dynamic.The outer diameter of middle pipe 4 is less than the internal diameter of outer sheath 2, so as to be inserted in outer sheath 2, and moves freely in outer sheath 2.
The internal diameter of middle pipe 4 is 0.5-5mm, and is less than the internal diameter of outer sheath 2, for example, in pipe 4 internal diameter can for 0.5,1,1.5,2,
2.5, any one in 3,3.5,4,4.5 and 5 mm or the range between two, preferably 0.7-4.2mm, further preferred 2-
3.4mm。
The wall of outer sheath 2 and middle pipe 4 is very thin, substantially can be with for the internal diameter or outer diameter of outer sheath 2 and middle pipe 4
It ignores, therefore, in the present invention, the internal diameter and outer diameter of outer sheath 2 can be considered as essentially identical, the internal diameter of middle pipe 4
It can also be considered as with outer diameter essentially identical.
The opening of the front end of middle pipe 4 is connect with the rear end (bottom end of " bowl " shape) of elastic network(s) 1, and size is less than elasticity in blood
The small-sized thrombus of the mesh size of the rear end of net 1 can pass through mesh and enter in pipe 4 it is intracavitary.The rear end of middle pipe 4 passes through only
It is connected after blood valve 3 with communicating valve 5.
As illustrated in fig. 1 and 2, the front end of haemostatic valve 3 is connected with the rear end of outer sheath 2, and rear end has opening, and middle pipe 4 passes through
The opening of rear end be inserted in after haemostatic valve 3 in outer sheath 2 (in i.e. the rear end of pipe 4 by the open rearward end of haemostatic valve 3 backward
It stretches out).The front end of haemostatic valve 3 is connect with the mode that the rear end of outer sheath 2 can be connected through a screw thread.For example, can be in epitheca
External screw thread 21 is set on the outer wall of the rear end of pipe 2, corresponding internal screw thread 31 is set on the inner wall of the front end of haemostatic valve 3, thus
Outer sheath 2 and haemostatic valve 3 are connected；Or external screw thread 21 is set on the outer wall of the rear end of outer sheath 2, in haemostatic valve 3
The nut (nut has internal screw thread) that is rotatably connected with haemostatic valve 3 of front end setting, thus by nut by 3 He of haemostatic valve
Outer sheath 2 connects.It, can be in the threaded connection place of haemostatic valve 3 and outer sheath 2 setting anti-leak in order to reinforce leakproofness
Device, such as elastic washer.
It is leaked in gap of the blood between the inner wall of outer sheath 2 and the outer wall of middle pipe 4 in order to prevent, before haemostatic valve 3
End is internally provided with tampon 32.Tampon 32 is flexible laminated structure, such as can be silica gel piece.As shown in figure 3,
Crack 321 is provided on tampon 32.Crack can be set to mutually perpendicular two.Middle pipe 4 can be from the rear end of haemostatic valve 3
It is entered back into outer sheath 2 after entering through the crack 321 being arranged on tampon 32.Since tampon 32 is flexible knot
Structure, after pipe 4 passes through the entrance outer sheath 2 of tampon 32 in the middle, tampon 32 can be stuck on the outer wall of middle pipe 4, thus anti-Hemostatic Oral Liquid
It is leaked in gap between the inner wall of outer sheath 2 and the outer wall of middle pipe 4；Pipe 4 is not passed through tampon 32 into epitheca in the middle
When pipe 2, the crack 321 on tampon 32 is in closed state, and blood will not be let out from outer sheath 2 via the rear end of haemostatic valve 3
It spills.
As shown in Figure 1, in a preferred embodiment, the blood vessel proximal end protector of the utility model further includes connection
Valve 5.The arrival end (front end) of communicating valve 5 is connected with the rear end of middle pipe 4, and outlet end can connect Biochemical analyzer device, thus will
Thrombus removes external.Communicating valve 5 can for example connect bonding or by way of mechanical structure fixation with the rear end of middle pipe 4
It connects.The thrombus that elastic network(s) 1 retains is transported to valve 6 by conduit for controlling by communicating valve 5, and body further is discharged in thrombus
Outside.
As shown in Figure 1, the blood vessel proximal end protector of the utility model is also in another further preferred embodiment
Including valve 6.The input end of valve 6 is connected by conduit with the outlet end of communicating valve 5, and outlet end can be with Biochemical analyzer device
It is connected.
By setting communicating valve 5 and valve 6, preferably the thrombus from middle pipe 4 can be controlled, so as to suitable
Opportunity extract thrombus, while can also facilitate carry out extract thrombus operation, reduce infection and probability.
Blood vessel proximal end provided by the utility model protector can cooperate the use of blood vessel Transluminal Angioplasty also to can be used alone.Below
By taking the application in carotid stents plasty (CAS) as an example, illustrate that the blood vessel proximal end that the embodiments of the present invention provide is protected
Protect the application method of device.
When being used for carotid stents plasty (CAS), puncture is being formed by puncturing femoral artery in patient thigh root
After successfully placing carotid stents at mouthful, elastic network(s) 1 will be taken in into completely outer sheath by pipe 4 in the pull of rear end
Blood vessel proximal end protector in 2 is under the guiding of guiding wire, from the puncture orifice of patient's femoral artery, with one end of elastic network(s) 1
I.e. front end enters femoral artery, and further under the guidance of guiding wire, and outer sheath 2, which enters blood vessel and reaches, is located at femoral artery
The predetermined position in blood vessel between puncture orifice and carotid stents, at this point, haemostatic valve 3 stays at the puncture orifice of femoral artery；So
Afterwards, elastic network(s) 1 is released from the front end of outer sheath 2 by pipe 4 in pushing forward, since elastic network(s) 1 has excellent elasticity,
Elastic network(s) 1 can be expanded rapidly after being released from the front end of outer sheath 2 expand formed proximal end it is funnel-shaped, distally be in umbrella shape
Shape, and the front end of elastic network(s) 1 and blood vessel are in close contact, and the thrombus in blood can stay in bullet under the obstruction of elastic network(s) 1
Property net 1 in, part of lesser thrombus can be entered by the mesh at the rear end (bottom end of " bowl " shape) of elastic network(s) 1 in manage
In 4, and further to communicating valve 5, so as to be extracted out in vitro by the valve 6 being connect with communicating valve 5；Biggish thrombus can
To be adhered on elastic network(s) 1.After use, the blood vessel proximal end protector of the utility model is taken out discarding from blood vessel is
It can.Pass through since the mesh of elastic network(s) 1 can permit blood flow, and there are gaps between outer sheath 2 and vascular wall, therefore, blood
Liquid can be flowed through from the gap between the mesh and outer sheath 2 and vascular wall of elastic network(s) 1, so that blood flow will not be hindered completely
It is disconnected, so as to avoid the complete blocking blood flow bring risk of MOMA.
To sum up, blood vessel proximal end provided by the utility model protector due to using elastic network(s) (the close net of metal), and combines
One layer of ultra-thin polyurethane film is coated on the surface of elastic network(s), and manages the setting with outer sheath in combination, not only can efficiently be received
Collect the impurity such as the broken thrombus in blood, and thrombus is conveniently removed in vitro；And it can permit that blood flow is smooth to be passed through
And incomplete blocking blood flow, avoid the generation of ischemic complications.Blood vessel proximal end provided by the utility model protector can be with
Biochemical analyzer device is directly connected with valve by communicating valve, thus may be implemented continuous sucking thrombus (and MOMA need using
Syringe needle is aspirated), to substantially increase the efficiency of aspirate thrombi, ensure that broken thrombus will not again result in embolism or
Drift.
As known by the technical knowledge, the utility model can pass through other essence without departing from its spirit or the reality of essential feature
Scheme is applied to realize.Therefore, embodiment disclosed above, in all respects are merely illustrative, and are not only
's.All changes that come within the scope of the invention or equivalents of the invention are by the utility model packet
Contain.
Claims (10)
1. a kind of blood vessel proximal end protector characterized by comprising
Elastic network(s) is the reticular structure of front opening；
Outer sheath, the outer sheath are hollow tubular structure, and front end has the opening entered for the elastic network(s)；
Haemostatic valve, the front end of the haemostatic valve are connected with the rear end of the outer sheath, and rear end has opening；
Middle pipe, the middle pipe are hollow tubular structure, are partially sheathed in the outer sheath, the opening of the front end of the middle pipe
Connect with the rear end of the elastic network(s), the rear end of the middle pipe is stretched out backward from the open rearward end of the haemostatic valve, it is described in
Pipe can move freely in the outer sheath；By pushing the rear end for the middle pipe for stretching out the haemostatic valve to make forward
The elastic network(s) stretches out the outer sheath and in opened condition, or the middle pipe of the haemostatic valve is stretched out by pulling back
Rear end takes in the elastic network(s) in the outer sheath.
2. blood vessel proximal end according to claim 1 protector, it is characterised in that:
The diameter of the elastic network(s) under full open position is greater than the outer diameter of the outer sheath；
The elastic network(s) under full open position is " bowl " shape structure of front opening；
The elastic network(s) can be shrunk to cylinder-like structure of the diameter less than the internal diameter of the outer sheath.
3. blood vessel proximal end according to claim 1 or 2 protector, it is characterised in that:
The mesh size of the elastic network(s) is 50-5000 μm.
4. blood vessel proximal end according to claim 1 or 2 protector, it is characterised in that:
On the surface of the elastic network(s) be coated with polyurethane film, the polyurethane film with a thickness of 1-200 μm.
5. blood vessel proximal end according to claim 4 protector, it is characterised in that:
The aperture size of the polyurethane film is 80-200 μm；
The aperture size of the polyurethane film at the front end of the elastic network(s) is less than positioned at the rear end of the elastic network(s)
The aperture size of the polyurethane film at place.
6. blood vessel proximal end according to claim 1 protector, it is characterised in that:
The outer diameter of the outer sheath is 1-6mm；
The internal diameter of the middle pipe is 0.5-5mm.
7. blood vessel proximal end according to claim 1 protector, it is characterised in that:
Tampon is provided in the haemostatic valve, the tampon is flexible laminated structure；It is arranged on the tampon
There is crack, the crack is set as mutually perpendicular two.
8. blood vessel proximal end according to claim 1 protector, it is characterised in that:
Blood vessel proximal end protector further includes communicating valve, and the arrival end of the communicating valve is connected with the rear end of the middle pipe.
9. blood vessel proximal end according to claim 8 protector, it is characterised in that:
Blood vessel proximal end protector further includes valve, and the input end of the valve passes through the outlet end of conduit and the communicating valve
It is connected, outlet end is connected with Biochemical analyzer device.
10. blood vessel proximal end according to claim 1 protector, it is characterised in that:
The elastic network(s) is formed using the metal wire knitted of single or more niti-shaped memorial alloy；Or use NiTi shape
Memorial alloy, medical stainless steel or cochrome metal pipe material are cut by laser；Or use niti-shaped memorial alloy gold
Belong to powder 3D printing to form.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107440763A (en) * | 2017-08-16 | 2017-12-08 | 北京赛铂医药科技有限公司 | A kind of blood vessel near-end protector |
| CN112401973A (en) * | 2020-11-19 | 2021-02-26 | 上海腾复医疗科技有限公司 | Multifunctional sheath tube |
-
2017
- 2017-08-16 CN CN201721026297.4U patent/CN208388683U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107440763A (en) * | 2017-08-16 | 2017-12-08 | 北京赛铂医药科技有限公司 | A kind of blood vessel near-end protector |
| CN107440763B (en) * | 2017-08-16 | 2023-09-12 | 北京赛铂医药科技有限公司 | Vascular proximal protector |
| CN112401973A (en) * | 2020-11-19 | 2021-02-26 | 上海腾复医疗科技有限公司 | Multifunctional sheath tube |
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