CN205866735U - Blood pipe inner pressure measuring catheter - Google Patents
Blood pipe inner pressure measuring catheter Download PDFInfo
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- CN205866735U CN205866735U CN201620318335.2U CN201620318335U CN205866735U CN 205866735 U CN205866735 U CN 205866735U CN 201620318335 U CN201620318335 U CN 201620318335U CN 205866735 U CN205866735 U CN 205866735U
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Abstract
The utility model provides a blood pipe inner pressure measuring catheter, it includes: the distal end sleeve pipe, it has the seal wire inner chamber that solitary medical seal wire was received on slidable ground, proximal part, its and the hookup of distal end sleeve pipe, and pressure sensor, it sets up in proximal part for measuring endovascular blood pressure and producing the blood pressure signal, proximal part has and is used for the conveying to come the signal channel of autogenous pressure force transducer's blood pressure signal and be used for supporting signal channel and remove distal end sheathed tube connecting catheters, presses force transducer to be close to the distal end sleeve pipe. The utility model relates to an among the blood pipe inner pressure measuring catheter, the measurement that can let the doctor accomplish blood pipe inner pressure under the operation environment who know reduces measuring time, reduces operational risk, promotes blood pipe inner pressure measuring convenience and maneuverability by a wide margin.
Description
Technical field
The present invention relates to a kind of intravascular pressure and measure conduit.
Background technology
In many cardiovascular diseases's such as coronary heart disease, narrow (such as being caused by vascular plaque) of blood vessel can affect blood
Normal supply, when blood vessel is even caused blocking by further stricturization, then by causing serious change such as myocardial infarction.
Percutaneous coronary intervention (pci) (PCI) is current relatively effective treatment means.Tradition judges whether to implement interventional therapy (example
As angioplasty or support are placed) method be that doctor estimates the stenosis of arteria coronaria blood vessel by coronary angiography.But,
This traditional determination methods can not help doctor to make to judge the most accurately well, and it is possible to can cause doctor
Over-treatment.
In recent years, in order to judge that patient the most really needs to implement interventional therapy more accurately, assessment stenotic lesion is used
The blood flow reserve mark (Fractional Flow Reverse is called for short FFR) blocking the degree that blood flows through blood vessel increasingly obtains
To application and popularization.The maximum blood flow that FFR is defined as in artery stenosis and the ratio of normal maximum blood flow.In order to calculate Ink vessel transfusing
The FFR of given narrow (the most likely placing the position of intravascular stent), needs to measure and gather narrow distal side (example respectively
As, narrow downstream, away from aorta) and the blood pressure readings of narrow proximal lateral (the narrowest upstream, near aorta).
Clinical research shows, narrowness is the highest, and FFR value is the lowest, and whether FFR value can be as useful less than assessed value (such as 0.8)
Criterion, may decide that whether such patient implements interventional therapy based on this standard doctor.Having of this criterion
Effect property has obtained the confirmation of American-European multiple large-scale clinical study results (such as FAME clinical research).
At present, as the method for blood pressure in measurement patient's blood vessel, such as, there is the method using pressure-sensing seal wire.This pressure
Power sensing seal wire is internally provided with pressure transducer at seal wire.Before carrying out calcification score, by pressure-sensing seal wire through narrow
Narrow distal side and proximal lateral, respectively record far-end blood pressure and near-end blood pressure.Thus, it is possible to calculate narrow FFR value.
Summary of the invention
But, for existing pressure-sensing seal wire, owing to being required to inside seal wire arrange pressure transducer, therefore
The conventional medical guiding wire (being such as used for placing the medical guiding wire such as foley's tube or scaffold tube) that its performance and doctor are used has
Notable difference, this type of usual hardness of pressure-sensing seal wire is bigger, and operation controllability has declined, for complex lesions region very
May not easily pass through.Therefore, doctor is when carrying out intravascular pressure measurement and interventional therapy to complex lesions region, according to seal wire
The difference of function, generally requires and changes different seal wires, and change seal wire and can increase complexity and the risk of operation.
It addition, for a lot of doctors, in interventional therapy, get used to use some specific dimensions, possess good
The seal wire of good pliability and torsion control property etc..Therefore, allowing doctor reuse other kinds of seal wire and carry out interventional therapy, also having can
Can increase time and the difficulty of interventional therapy (such as seal wire being navigated to stenotic lesion).
The present invention completes in view of the situation of above-mentioned prior art, its object is to provide one can be easy to doctor and makes
Be applicable to interventional therapy intravascular pressure measure conduit.
To this end, the invention provides a kind of intravascular pressure to measure conduit, comprising: distal cannula, it has slidably
Ground receives the guidewire lumen of single medical guiding wire；Proximal part, it couples with described distal cannula；And pressure transducer,
It is arranged in described proximal part, is used for measuring endovascular blood pressure and producing blood pressure signal, and described proximal part has use
In transmitting the signal path of the described blood pressure signal from described pressure transducer and being used for supporting described signal path and moving
The connection conduit of dynamic described distal cannula, described pressure transducer is near described distal cannula.
In intravascular pressure involved in the present invention measures conduit, only distal cannula is limited by medical guiding wire, therefore, and doctor
Life can be changed intravascular pressure rapidly and measure conduit, and can the compatible conventional medical guiding wire that doctor uses at present, from
And doctor can be allowed to complete the measurement of intravascular pressure under familiar operating environment, reduce the measurement time, reduce operational risk,
Convenience and operability that intravascular pressure measure are substantially improved.Further, since pressure transducer is arranged on proximal part
In, therefore can reduce blood pressure measurement conduit at endovascular cross-sectional area, thus reduce the obstruction to endovascular blood flow and imitate
Should, it is possible to improve the certainty of measurement of the pressure transducer involved by present embodiment.Further, since pressure transducer is arranged
In proximal part, therefore can also reduce pressure transducer and measure catheter main body (mainly proximal part) with intravascular pressure
The difficulty of the manufacturing process engaged.
It addition, in intravascular pressure involved in the present invention measures conduit, alternatively, described distal cannula with described closely
End portion couples via outer tube.Thereby, it is possible to realize coupling with proximal part by distal cannula by outer tube.
It addition, in intravascular pressure involved in the present invention measures conduit, alternatively, described pressure transducer is arranged on
The end of the close described distal cannula of described proximal part.In this case, owing to arranging more to lean on by pressure transducer
The nearly distal cannula limited by medical guiding wire, therefore, it is possible to more easily control the position location of pressure transducer.
It addition, in intravascular pressure involved in the present invention measures conduit, alternatively, described guidewire lumen is slidably
Receive the medical guiding wire with external diameter about 0.2mm to 1mm.Measure thereby, it is possible to improve intravascular pressure involved in the present invention
The suitability of conduit.
It addition, in intravascular pressure involved in the present invention measures conduit, alternatively, described guidewire lumen includes tubular
Inner chamber and extend to described outer tube from described tubular inner chamber and run through the bending inner chamber of side of described outer tube.This
In the case of, it is possible to make the guidewire lumen of pressure measurement conduits in medical guiding wire intravasation more easily, the most medical lead
Silk is in the movement of guidewire lumen.
It addition, in intravascular pressure involved in the present invention measures conduit, alternatively, described distal cannula have along
The perforate of the length direction of described distal cannula, described perforate allows blood flow to flow into described guidewire lumen.Thereby, it is possible to reduction blood
Overpressure measures the use resistance of conduit.
It addition, in intravascular pressure involved in the present invention measures conduit, alternatively, described connection sleeve pipe has permission
Described pressure transducer measures the opening of blood pressure.Thereby, it is possible to facilitate intravascular pressure to measure conduit, endovascular blood flow is entered
Row pressure measxurement.
It addition, in intravascular pressure involved in the present invention measures conduit, alternatively, described signal path is at least part of
Be contained in described connection conduit.Thereby, it is possible to provide protection structure for signal path.
Additionally, in intravascular pressure involved in the present invention measures conduit, alternatively, attached at described pressure transducer
Closely, the ring-shaped sleeve worked as location mark it is additionally provided with.Thus, by the ring-shaped sleeve as location mark, it is possible to
Efficiently locate pressure intravascular pressure and measure the pressure transducer of conduit.
In accordance with the invention it is possible to reduction blood pressure measurement conduit is at endovascular cross-sectional area, thus reduce endovascular
The blocking effect of blood flow, it is possible to improve the certainty of measurement of pressure transducer.Further, since pressure transducer is arranged on near-end
In part, therefore can also reduce pressure transducer and measure what catheter main body (mainly proximal part) engaged with intravascular pressure
The difficulty of manufacturing process.
Accompanying drawing explanation
Fig. 1 shows the intravascular pressure involved by embodiments of the present invention and measures the three-dimensional structure diagram of conduit.
The intravascular pressure measurement conduit that Fig. 2 shows involved by embodiments of the present invention slips over showing of medical guiding wire
It is intended to.
The intravascular pressure measurement conduit that Fig. 3 shows involved by embodiments of the present invention is situated between in patient body
The schematic diagram entered.
Fig. 4 shows the intravascular pressure shown in Fig. 1 and measures the schematic section of conduit.
Fig. 5 shows the pressure transducer in the intravascular pressure measurement conduit involved by embodiments of the present invention
Partial enlarged drawing.
Fig. 6 is that the intravascular pressure involved by embodiments of the present invention measures conduit at endovascular schematic cross-section.
Fig. 7 is that the intravascular pressure involved by embodiments of the present invention measures the conduit cross section along length of vessel direction
Schematic diagram.
Fig. 8 shows the using method of use intravascular pressure measurement conduit involved by embodiments of the present invention
Flow chart.
Symbol description:
1 ... intravascular pressure measurement conduit (blood pressure measurement conduit), 2 ... medical guiding wire, 10 ... distal cannula, 12 ... seal wire
Inner chamber, 20 ... proximal part, 21 ... opening, 22 ... signal path, 24 ... connection conduit, 30 ... outer tube, 40 ... pressure transducer,
50 ... ring-shaped sleeve, 100 ... blood vessel.
Detailed description of the invention
Hereinafter, with reference to accompanying drawing, the preferred embodiment of the present invention is explained.In the following description, for identical
Parts give identical symbol, the repetitive description thereof will be omitted.It addition, accompanying drawing the most schematically figure, parts chi each other
Very little ratio or the shape of parts etc. can be different from reality.
Fig. 1 shows that the intravascular pressure of embodiment involved in the present invention measures the three-dimensional structure diagram of conduit.Fig. 2 is
Show that the intravascular pressure involved by embodiments of the present invention is measured conduit and slipped over the schematic diagram of medical guiding wire.Fig. 3 is to show
Go out the intravascular pressure involved by embodiments of the present invention and measure the schematic diagram that conduit 1 carries out getting involved in patient body.?
In Fig. 1 to Fig. 3, represent for convenience, illustrate only intravascular pressure here and measure conduit 1 and the Local map of medical guiding wire, but
This is not configured to that intravascular pressure is measured conduit 1 and medical guiding wire 2 is limited to the most such length.It addition, at Fig. 2 and Tu
In 3, arrow A represents that intravascular pressure measures the direction that conduit 1 moves at Ink vessel transfusing along medical guiding wire 2.
As it is shown in figure 1, intravascular pressure measures conduit (hreinafter referred to as " blood pressure measurement conduit ") 1 includes distal cannula
10 and the proximal part 20 that couples with distal cannula 10.In the present embodiment, distal cannula 10 and proximal part 20 can be through
Coupled by outer tube 30.Although it addition, showing that distal cannula 10 and proximal part 20 are via outer tube 30 in the present embodiment
Couple, but present embodiment is not limited to this.Such as, distal cannula 10 can also and proximal part 20 direct by welding
Connect, it is also possible to by integrally formed to distal cannula 10 and proximal part 20 and form draw bail.
As in figure 2 it is shown, in the blood pressure measurement conduit 1 involved by present embodiment, distal cannula 10 has guidewire lumen
12.Guidewire lumen 12 has through structure on the length direction of blood pressure measurement conduit 1.In the present embodiment, in seal wire
Chamber 12 is slideably received within single medical guiding wire 2.That is, medical guiding wire 2 is that the distal cannula 10 with blood pressure measurement conduit 1 separates
And the most independent seal wire, medical guiding wire 2 can pass guidewire lumen 12.So, in the distal cannula by blood pressure measurement conduit 1
10 through time on medical guiding wire 2, and blood pressure measurement conduit 1 can be along medical guiding wire 2 relative movement.
As it is shown on figure 3, doctor etc. are during carrying out interventional therapy to patient, medical by making distal cannula 10 receive
Seal wire 2 also slides along medical guiding wire 2 toward the direction of arrow A, makes distal cannula 10 and the near-end coupled with distal cannula 10
In part 20 (mainly including the part of pressure transducer 40 (seeing Fig. 4)) can be sent to patient body (such as vein, dynamic
Arteries and veins) precalculated position.Thereby, it is possible to this precalculated position (such as lesions position) is carried out blood pressure measurement to obtain the blood of this position
The reading of stream deposit mark (FFR), provides reference for follow-up interventional therapy.
Proximal part 20 have for transmit from pressure transducer 40 blood pressure signal signal path 22 and for
Support signal path 22 the connection conduit 24 (seeing Fig. 4) of mobile distal cannula 10.In the present embodiment, proximal part 20
Connect conduit 24 constituent material be not particularly limited, material that hardness higher is preferably used, to guarantee that doctor controls in intervention
Can make the distal cannula 10 can be along medical guiding wire 2 relative movement and be advanced to by the effect of proximal part 20 during treatment
In patient's blood vessel, and then pressure transducer 40 is positioned to stenotic lesion.
Here, proximal part 20 is harder than distal cannula 10 and has more rigidity, in order to by proximal part 20
Effect can preferably move and advance distal cannula 10.In the present embodiment, the connection conduit 24 of proximal part 20 can
To be made up of medical stainless steel.It addition, proximal part 20 can also be by structures such as other materials such as Nitinol, nylon, plastics
Become.It addition, represent for convenience, accompanying drawing does not shows that the near-end being connected with external equipment (not shown) being positioned at outside patient body
The part of part 20.This segment proximal part 20 typically can be as the part of the operation blood pressure measurement conduits 1 such as doctor, by behaviour
Make this part, the propelling of the blood pressure measurement conduit 1 blood vessel depths in patient body further or blood vessel from the patient can be made
Exit.
In the present embodiment, blood pressure measurement conduit 1 also includes pressure transducer 40.Pressure transducer 40 may be used for surveying
Measure endovascular blood pressure and produce blood pressure signal.Pressure transducer 40 can be arranged in proximal part 20.Due to pressure sensing
Device 40 is arranged in proximal part 20, and therefore, pressure transducer 40 can obtain the protection of proximal part 20, and can with closely
End portion 20 forms more firm structure.
It addition, pressure transducer 40 can be fixed in the connection conduit 24 of proximal part 20.In the present embodiment, pressure
Force transducer 40 is fixed on the mode connected in conduit 24 of proximal part 20 and is not particularly limited, and such as pressure transducer 40 can
To be fixed on the connection conduit 24 of proximal part 20 by the mode such as bonding, welding, welding.
In certain embodiments, pressure transducer 40 can be passed by pressure with signal path 22 physical connection and electrically connecting
Produced by sensor 40, blood pressure signal is sent to the most external processing equipment (not shown) via signal path 22.
It addition, the intravascular pressure in present embodiment is measured in conduit 1, pressure transducer 40 can be arranged on close end
Divide the end of 20, and this end is near distal cannula 10.In this case, owing to pressure transducer 40 is closer to
The distal cannula 10 limited by medical guiding wire 2, therefore pressure transducer 40 can reach blood along with the slip of distal cannula 10
Precalculated position in pipe, can more easily control the position location of pressure transducer 40 simultaneously.
It addition, in the present embodiment, pressure transducer 40 is arranged in proximal part 20, and near distal cannula 10.
In other words, pressure transducer 40 is not arranged in distal cannula 10 (outside of distal cannula 10), and is provided in close end
In dividing 20, and near distal cannula 10.In this case, pressure transducer 40 is arranged in proximal part 20, permissible
Reduction blood pressure measurement conduit 1 is at endovascular cross-sectional area, thus reduces the blocking effect to endovascular blood flow, it is possible to
The certainty of measurement of raising pressure transducer 40 involved by present embodiment.
If it is said that in general, pressure transducer is arranged on distal cannula, then the cross section of pressure transducer self
Long-pending existence can cause the pressure measurement conduits increase relative to the cross-sectional area of blood flow, and therefore, such technical scheme can be led
The reading causing pressure transducer introduces more error.And in the present invention, by pressure transducer 40 is arranged on close end
In dividing the connection conduit 22 of 20, it is possible to be effectively reduced the pressure measurement conduits 1 cross-sectional area relative to blood flow, thus improve pressure
The certainty of measurement of force transducer 40.Additionally, pressure transducer 40 is arranged in the connection conduit 22 of proximal part 20, it is also possible to
Reduce the difficulty of packaging technology between pressure transducer 40 and proximal part 20, improve production efficiency.
As it has been described above, the value of blood flow reserve mark (FFR) (being called for short " FFR value ") can be used for assessing stenotic lesion blocks blood
Liquid stream crosses the degree of blood vessel, provides the decision-making whether carrying out interventional therapy for doctor etc..In order to calculate given narrow FFR value,
Need to measure respectively and gather narrow distal side (such as, narrow downstream, away from aorta) and narrow proximal lateral (such as
Narrow upstream, near aorta) blood pressure readings.The blood pressure gradient of stenotic lesion reflects the instruction of narrow seriousness.Narrow
Narrow degree is the most serious, and pressure drop is the biggest, and FFR value is the lowest.
In the present embodiment, the equipment that the signal path 22 of proximal part 20 is communicated to be positioned at outside patient body such as processes
The armarium such as device, display, computer, monitor.Thus, via the signal path 22 of proximal part 20, it is possible to will be by pressing
The blood pressure signal that force transducer 40 produces delivers to the armarium outside patient body in time.It addition, signal path 22 can also set
Put within connecting conduit 24, make connection conduit 24 be coated with signal path 22 at least in part, i.e. signal path 22 is at least in part
It is contained in connection conduit 24.Thus, connect conduit 24 and can play support and protection signal path 22.It addition, it is real at some
Executing in example, signal path 22 can also configure along the outer surface of proximal part 20.
In addition it is also possible to arrange implant 23, as shown in Figure 4 at signal path 22 with being connected between conduit 24.Thus, energy
Enough playing effectively supports and protection signal path 22.It addition, implant 23 can be dielectric, thereby may be ensured that signal
Path 22 and the electric insulation being connected between conduit 24.In the present embodiment, implant 23 is not particularly limited, the most permissible
Use medical silica-gel etc..
Fig. 4 shows the intravascular pressure shown in Fig. 2 and measures the schematic section of conduit.Fig. 5 shows the present invention
The intravascular pressure involved by embodiment measure the partial enlarged drawing of the pressure transducer in conduit.
In the present embodiment, as shown in Figure 4, in pressure transducer 40 is arranged on proximal part 20.Specifically, pressure
Sensor 40 is arranged in the connection conduit 24 of proximal part 20.It addition, connecting the relative with pressure transducer 40 of conduit 24
The position answered is provided with opening 21.Via this opening 21, pressure transducer 40 can directly contact with endovascular blood flow, thus
Pressure transducer 40 can sense the blood pressure in patient's blood vessel, and produces blood pressure signal correspondingly.
Further, since pressure transducer 40 is arranged in the connection conduit 24 of proximal part 20, therefore, pressure transducer 40
The protection connecting conduit 24 of proximal part 20 can be obtained, thus also be able to improve the structural stability of pressure transducer 40.
It addition, in the present embodiment, pressure transducer 40 can be capacitance pressure transducer, resistive pressure sensing
Device, fibre optic compression sensor etc..It addition, pressure transducer 40 can also be MEMS pressure sensor.Such as, pressure transducer 40
Measurement scope be about-50mm Hg to 300mm Hg.According to the type of pressure transducer 40, signal path 22 can be conduction
Medium such as electric lead.Additionally, in certain embodiments, signal path 22 can also be wireless communication line, infrared communication line
Road, optical fiber telecommunications line or ultrasonic communication circuit.
In the present invention, blood pressure measurement conduit 1 can enter respectively as single device with medical guiding wire 2 or exit disease
People's is internal.In this case, doctor can independently controlled blood pressure measurement conduit 1 and medical guiding wire 2.By blood pressure is surveyed
Amount conduit 1 with medical guiding wire 2 as single device, it is possible to make doctor operate blood pressure measurement conduit 1 and medical more easily
Seal wire 2.
It addition, the length of blood pressure measurement conduit 1 and medical guiding wire 2 is not particularly limited, from the viewpoint being easy to interventional therapy
Seeing, such as length is about 160cm to 220cm.It addition, distal cannula 10 length is it is not also specifically limited, such as can be about
0.5cm～20cm.In this case, owing to distal cannula 10 is much smaller than the length of medical guiding wire 2, therefore, doctor waits in profit
When operating blood pressure measurement conduit 1 with medical guiding wire 2, blood pressure measurement conduit 1 only a part (mainly distal cannula 10) is through doctor
With on seal wire 2, therefore, doctor etc. can utilize medical guiding wire 2 to change blood pressure measurement conduit 1 rapidly.
It is said that in general, during interventional therapy, operator's certain position (example the most from a patient such as doctor
At femoral artery) along blood vessel, guiding catheter (not shown) is advanced at the coronary artery of such as heart.Here, guiding catheter
Diameter slightly larger than blood pressure measurement conduit 1 involved in the present invention and medical guiding wire 2.Then, by such as injecting contrast agent pair
This local location radiography, then, such as, is advanced to send out along this guiding catheter by blood pressure measurement conduit 1 and medical guiding wire 2
The position of the less blood vessel of sick change.Specifically, doctor is medical through this by distal cannula 10 by blood pressure measurement conduit 1
(Fig. 4 is seen) so that guidewire lumen 12 slips over medical guiding wire 2 on seal wire 2, and by operation (such as push away and/or draw) patient
The connection conduit 24 of outside proximal part 20 (or with is connected the operation device (not shown) that conduit 24 connects) moves far
End sleeve pipe 10 and proximal part 20, until the pressure transducer 40 being arranged in proximal part 20 is in predetermined position.
In the present embodiment, the size of guidewire lumen 12 is not particularly limited, such as, can receive and slip over about 0.2mm
Medical guiding wire to 1mm overall diameter.It addition, guidewire lumen 12 can also receive and slip over specific criteria in interventional therapy field
The medical guiding wire of size.
As it has been described above, in carrying out interventional procedure, need to be made by the connection conduit 24 of operation proximal part 20
Distal cannula 10 moves relative to medical guiding wire 2.When along medical guiding wire 2 when Ink vessel transfusing moves or adjusts distal cannula 10,
Owing to blood pressure measurement conduit 1 reduces at endovascular sectional area, therefore, it is possible to the impact measuring conduit 1 to measuring that reduces blood pressure,
Improve the certainty of measurement of pressure transducer 40.
It addition, near the pressure transducer 40 of proximal part 20, the annular casing as location mark can be provided with
Pipe 50.Ring-shaped sleeve 50 comprises material opaque to X-ray.As the ring-shaped sleeve 50 of mark, can position under X-ray
Pressure transducer 40 is in endovascular position.In the present embodiment, ring-shaped sleeve 50 can be arranged on the company of proximal part 20
Connect the periphery of conduit 24, such as ring-shaped sleeve 50 to be waited by such as welding and be bonded in the connection conduit 24 of proximal part 20
On.In certain embodiments, ring-shaped sleeve 50 can also become the part connecting conduit 24.
It addition, in the present embodiment, comprise X-ray impermeable owing to being arranged on the ring-shaped sleeve 50 of pressure transducer 40
Bright material, therefore, when human body is when being irradiated by X-ray, and the radiopacit of ring-shaped sleeve 50 can be formed the brightest
Region, by this bright areas, doctor etc. can quickly find and position mark accordingly.Therefore, in the present embodiment, ring
The location mark of the pressure transducer 40 that shape sleeve pipe 50 can also be arranged in proximal part 20 uses.
Further, since pressure transducer 40 is arranged near the position of ring-shaped sleeve 50, ring-shaped sleeve therefore can be passed through
The location mark action of 50 orients the approximate location of the pressure transducer 40 in proximal part 20.
As it has been described above, in certain embodiments, outer tube 30 can couple distal cannula 10 and proximal part 20.In this feelings
Under condition, the outer surface of outer tube 30 is preferably continuous with the outer surface of distal cannula 10 and proximal part 20, thus can make blood
Pressure is measured the outer surface of conduit 1 and is formed continuous surface, it is possible to reduce blood pressure measurement conduit 1 at endovascular resistance.Outward
The material of pipe 30 can be polyester, polyamide, nylon, nylon elastomer, polyurethane, polyimides etc..In the present embodiment,
Outer tube 30 can be passed through, use mode physically or chemically to include that the modes such as sweat soldering, laser welding, medical bonding are by far-end
Sleeve pipe 10 couples with proximal part 20.
In other embodiment, outer tube 30 can also become a part for distal cannula 10 forming process.So, outward
Pipe 30 essentially becomes a part for distal cannula 10.Then, by using the modes such as welding by distal cannula 10 and close end
Divide 20 compact siro spinning technology.Formed it addition, the guidewire lumen 12 of distal cannula 10 can melt molding by heat.
In the present embodiment, it is also possible between the inner side of the outside of guidewire lumen 12 and outer tube 30 gel filled such as
Medical silicone gels.
It addition, as shown in Figure 4, in distal cannula 10, guidewire lumen 12 can include tubular inner chamber 122 and in tubular
Chamber 122 extends to outer tube 30 and runs through the bending inner chamber 124 of side of outer tube 30.Here, tubular inner chamber 122 and bending inner chamber
124 connections, therefore ensure that medical guiding wire 2 can enter guidewire lumen 12 or exit from guidewire lumen 12.
In guidewire lumen 12, bending inner chamber 124 extends to outer tube 30 side from tubular inner chamber 122.Correspondingly, outer tube 30
It is formed with the side opening corresponding with bending inner chamber 124.Specifically, the internal diameter axis of guidewire lumen 12 is from tubular inner chamber 122
Gradually change to bending inner chamber 124, and bend internal diameter axis and the guidewire lumen 12 of close outer tube 30 side of inner chamber 124
Tubular inner chamber 122 internal diameter axis produces deviation.
By this configuration of guidewire lumen 12, it is possible to allow medical guiding wire 2 to enter the guidewire lumen 12 of distal cannula 10,
Thus beneficially medical guiding wire 2 slides in guidewire lumen 12.In the present embodiment, it is as noted previously, as and is utilizing blood pressure to survey
Amount conduit 1 carries out the FFR of interventional therapy when measuring, and blood pressure measurement conduit 1 is in only distal portions 10 is limited in medical guiding wire 2
Sliding, therefore, doctor etc. can operate and change the blood pressure measurement conduit 1 involved by present embodiment rapidly, it is possible to
Improve the procedure efficiency of interventional therapy.
Such as, in the present embodiment, it is shown that guidewire lumen 12 includes tubular inner chamber 122 and continues from tubular inner chamber 122
Bending inner chamber 124 to outer tube 30 side running through outer tube 30.But, guidewire lumen 12 can also be only in distal cannula 10 shape
Become to run through inner chamber, and without outer tube 30.Now, guidewire lumen 12 is only limited in distal cannula 10, is not extend to outer tube
30。
In the present embodiment, (portion of pressure transducer 40 is mainly included due to distal cannula 10 and proximal part 20
Point) move along medical guiding wire 2 and the precalculated position that is sent in patient's blood vessel, therefore, doctor waits in operation present embodiment
It is not required to reorientate medical guiding wire 2 during involved blood pressure measurement conduit 1.
Specifically, such as when the pressure transducer 40 on blood pressure measurement conduit 1, to be positioned in narrow far-end (the narrowest
Narrow downstream) time, first measure the blood pressure of narrow remote end side.Then, (i.e. can keep without adjusting the position of medical guiding wire 2
The position of medical guiding wire 2), pressure transducer 40 just can be made to arrive by movement (such as advance and/or retract) distal cannula 10
Reach narrow proximal lateral, thus, it is possible to read narrow remote end and the blood pressure of narrow width proximal in the case of not moving medical guiding wire 2
Reading.Therefore, the blood pressure measurement conduit 1 involved by present embodiment can reduce the operation complexity of interventional therapy and save hands
The art time.
Fig. 6 is that the intravascular pressure involved by embodiments of the present invention measures conduit at endovascular schematic cross-section.
Fig. 7 is the schematic section along length of vessel direction of the blood pressure measurement conduit involved by embodiments of the present invention.
In fig. 6 it is shown that blood pressure measurement conduit 1 schematic cross-section of movement in blood vessel 100.As shown in Figure 6, doctor
In the case of being placed in patient's blood vessel with seal wire 2, blood pressure measurement conduit 1 can be along medical guiding wire 2 at blood vessel
Relative movement in 100, thus the convenient given stenosis to the blood vessel 100 navigating to patient.It addition, Fig. 6 is also shown for blood pressure
Measure conduit 1 when along medical guiding wire 2 relative movement in blood vessel 100 in the approximate location of blood vessel 100.
In fig. 7 it is shown that there is narrow schematic diagram in the blood vessel 100 of patient.As it is shown in fig. 7, at the blood vessel of blood vessel 100
Speckle 110 it is formed with on inwall.The formation of speckle 110 causes this part blood vessel to present narrow in the image under X-ray.This
In, the blood flow of blood vessel 100 flows to the far-end 100a of blood vessel 100 along blood flow direction D from the near-end 100b of blood vessel 100.
Measuring to carry out the FFR of this narrow blood vessel, doctor waits and by operation blood pressure measurement conduit 1 being included, pressure passes
The proximal part 20 of sensor 40 is placed in the distal side 100a of narrow blood vessel (such as coronary artery) 100 (i.e. under blood flow
Trip).Now, pressure transducer 40 is positioned at the distal side (downstream) at narrow distal side 100a, records the blood pressure Pd of distal side.
Then, pressure transducer 40 is placed in narrow position (such as stenotic lesion 110) proximal lateral (i.e. the upstream of blood flow, such as
Near aorta) the blood pressure Pp of 100b.FFR value can be with abbreviation for remote pressure relative to the ratio of proximal pressure, i.e. FFR=
Pd/Pp.In the present embodiment, for term " downstream " and " upstream " are the normal direction " D " (seeing Fig. 7) relative to blood flow
's.
Although the above-mentioned intravascular pressure measurement conduit 1 that describe in detail involved by embodiments of the present invention, but this
Invention is not limited to above-mentioned embodiment.Such as, in certain embodiments, can arrange multiple along the sidepiece of distal cannula 10
Perforate (not shown).The setting of perforate can reduce the probability of the blocking in distal cannula 10.Such as, when blood pressure measurement conduit
1 when being moved through tremulous pulse, and speckle 110 grade of blood vessel wall likely can enter distal cannula 10, hinders distal cannula 10 along doctor
With the relative movement of seal wire 2, in the sidepiece of distal cannula 10, it is provided with perforate can suppress this counter productive.
Hereinafter, with reference to Fig. 8, describe the intravascular pressure involved by embodiments of the present invention and measure the user of conduit
Method.
Fig. 8 shows the flow process that the intravascular pressure involved by embodiments of the present invention measures the using method of conduit
Figure.When using blood pressure measurement conduit 1, first, carry out blood vessel from the specific part (such as femoral artery, radial artery etc.) of patient and wear
After thorn and intervention prepare, medical guiding wire 2 is sent to internal precalculated position (step S10) (seeing Fig. 3).
In above-mentioned steps S10, owing to vascular puncture and intervention prepare to belong to the more conventional operation technique of ratio, the most specifically
Details of operation here is omitted.In certain embodiments, point of puncture can be chosen as about 2cm below the stock band of patient,
And the underface of femoral pulse.Utilize puncture needle after point of puncture punctures, send into guide wire along puncture needle, then exit
Puncture needle, sends into arterial sheath along guide wire, then further takes out guide wire, thus complete femoral artery puncture.
After completing vascular puncture and getting involved preparation, guiding catheter (not shown) can be sent into via arterial sheath, and will lead
Guiding tube sends into ad-hoc location, and uses contrast agent to carry out radiography.Such as, for coronary heart disease etc., by injecting contrast agent at hat
Shape tremulous pulse carries out angiography.The guiding catheter that present embodiment is used is not particularly limited, such as, can use Jie Shi
(Judkins) coronary artery catheter etc..
It addition, in step slo, owing to pressure transducer 40 is arranged in the proximal part 20 of blood pressure measurement conduit 1, because of
This, when pushing blood pressure measurement conduit 1 along medical guiding wire 2, reduce the cross-sectional area of blood pressure measurement conduit 1, therefore, it is possible to
Reduce blood pressure and measure the propelling movement resistance of conduit 1.
Then, medical guiding wire 2 configures blood pressure measurement conduit 1 (that is, by medical guiding wire 2 through blood pressure measurement conduit 1
Guidewire lumen 12), and blood pressure measurement conduit 1 is sent at the stenotic lesion of patient's blood vessel 100 along medical guiding wire 2 so that blood
Pressure measure the pressure transducer 40 on conduit 1 be positioned above-mentioned precalculated position vicinity (such as, stenotic lesion upstream or under
Trip) (step S20).Specifically, doctor etc. can by operation patient body outside the proximal part 20 of blood pressure measurement conduit 1,
Control the blood pressure measurement conduit 1 feeding position along medical guiding wire 2.In certain embodiments, mobile doctor can need not
In the case of seal wire 2, distal cannula 10 is made to slide along medical guiding wire 2 and advance far-end set by operation proximal part 20
Pipe 10.
In step S20, doctor etc. tentatively can be sentenced by the blood vessel image formed by contrast agent under range estimation X-ray
The stenosis of disconnected patient's blood vessel.Meanwhile, under the auxiliary of X ray image, the blood pressure measurement of present embodiment is led by doctor etc.
Pipe 1 is sent at the stenotic lesion of patient's blood vessel 100.
Then, the pressure transducer 40 of blood pressure measurement conduit 1 is used to measure the blood pressure Pd in this downstream, pre-position (i.e.
The blood pressure Pd of distal side 100a).Then, by adjusting the position of blood pressure measurement conduit 1, the pressure of blood pressure measurement conduit 1 is passed
Sensor 40 moves to the upstream of stenotic lesion, measures blood pressure Pp (i.e. the blood pressure Pp of proximal lateral the 100b) (step of stenotic lesion upstream
Rapid S30).In certain embodiments, when adjusting the measurement position of blood pressure measurement conduit 1 in step s 30, it may not be necessary to again
The position of location medical guiding wire 2, i.e. can be in the case of keeping medical guiding wire 2 invariant position, only by operation blood pressure measurement
Blood pressure measurement conduit 1 just can be adjusted to the upstream of other positions such as stenotic lesion of stenotic lesion by conduit 1.
Although the blood pressure Pd in stenotic lesion downstream first measured by blood pressure measurement conduit 1 in step s 30, then measures narrow disease
Become the blood pressure Pp of upstream.But, present embodiment is not limited to this, such as, can also first measure the blood pressure Pp of stenotic lesion upstream,
At the blood pressure Pd measuring stenotic lesion downstream.In this case, the FFR value of this stenotic lesion also can successfully be calculated.
It addition, in step s 30, by blood pressure signal (the blood pressure Pd of distal side and near-end produced by pressure transducer 40
The blood pressure Pp of side) it is output to the most external processing equipment (not shown) via signal path 22.
Finally, by patient body outside processing equipment, the blood pressure Pd of distal side and the blood pressure Pp of proximal lateral can be calculated
Ratio (the downstream blood pressure ratio to the upstream blood pressure) Pd/Pp of two measured values is as the value of FFR, i.e. FFR=Pd/Pp (step
S40).In step s 40, in order to more be precisely calculated above-mentioned FFR value, above-mentioned pressure can be passed in above-mentioned processing equipment
Blood pressure signal acquired in sensor 40 carries out Error processing.
Although being illustrated the present invention above in association with drawings and embodiments, but it is not intended to limit
The present invention, it will be appreciated that to those skilled in the art, without departing from the spirit and scope of the present invention, can
To deform the present invention and to change, these deformation and change each fall within the scope of the claimed protection of the present invention.
Claims (9)
1. an intravascular pressure measures conduit, it is characterised in that:
Including:
Distal cannula, it has the guidewire lumen slideably received within single medical guiding wire；
Proximal part, it couples with described distal cannula；And
Pressure transducer, it is arranged in described proximal part, is used for measuring endovascular blood pressure and producing blood pressure signal,
Described proximal part has for transmitting from the signal path of described blood pressure signal of described pressure transducer, Yi Jiyong
In supporting described signal path the connection conduit of mobile described distal cannula,
Described pressure transducer is near described distal cannula.
2. intravascular pressure as claimed in claim 1 measures conduit, it is characterised in that:
Described distal cannula couples via outer tube with described proximal part.
3. intravascular pressure as claimed in claim 1 measures conduit, it is characterised in that:
Described pressure transducer is arranged on the end of the close described distal cannula of described proximal part.
4. the intravascular pressure as described in any one in claims 1 to 3 measures conduit, it is characterised in that:
Described guidewire lumen is slideably received within having the medical guiding wire that external diameter is 0.2mm to 1mm.
5. intravascular pressure as claimed in claim 2 measures conduit, it is characterised in that:
Described guidewire lumen includes tubular inner chamber and extends to described outer tube from described tubular inner chamber and run through described outer tube
The bending inner chamber of side.
6. the intravascular pressure as described in any one in claims 1 to 3 measures conduit, it is characterised in that:
Described distal cannula has the perforate of the length direction arrangement along described distal cannula,
Described perforate allows blood flow to flow into described guidewire lumen.
7. intravascular pressure as claimed in claim 1 measures conduit, it is characterised in that:
Described connection conduit has the opening allowing described pressure transducer to measure blood pressure.
8. intravascular pressure as claimed in claim 1 measures conduit, it is characterised in that:
Described signal path is at least partially recessed in described connection conduit.
9. intravascular pressure as claimed in claim 1 measures conduit, it is characterised in that:
Near described pressure transducer, it is additionally provided with the ring-shaped sleeve as location mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620318335.2U CN205866735U (en) | 2016-04-17 | 2016-04-17 | Blood pipe inner pressure measuring catheter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620318335.2U CN205866735U (en) | 2016-04-17 | 2016-04-17 | Blood pipe inner pressure measuring catheter |
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| CN205866735U true CN205866735U (en) | 2017-01-11 |
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|---|---|---|---|
| CN201620318335.2U Active CN205866735U (en) | 2016-04-17 | 2016-04-17 | Blood pipe inner pressure measuring catheter |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018166195A1 (en) * | 2017-03-15 | 2018-09-20 | 深圳北芯生命科技有限公司 | Intravascular pressure measuring catheter having mounting base |
| CN111603152A (en) * | 2020-04-26 | 2020-09-01 | 杨铭轲 | Invasive blood pressure measuring device |
| CN112294278A (en) * | 2019-08-02 | 2021-02-02 | 深圳北芯生命科技有限公司 | Intravascular pressure measuring catheter |
| CN112672683A (en) * | 2018-08-13 | 2021-04-16 | 美敦力瓦斯科尔勒公司 | FFR catheter with suspended pressure sensor and method of making same |
| CN113520354A (en) * | 2018-12-31 | 2021-10-22 | 深圳北芯生命科技股份有限公司 | Catheter simulator for pressure measuring catheter |
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2016
- 2016-04-17 CN CN201620318335.2U patent/CN205866735U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018166195A1 (en) * | 2017-03-15 | 2018-09-20 | 深圳北芯生命科技有限公司 | Intravascular pressure measuring catheter having mounting base |
| CN108618769A (en) * | 2017-03-15 | 2018-10-09 | 深圳北芯生命科技有限公司 | Intravascular pressure with mounting base measures conduit |
| CN112672683A (en) * | 2018-08-13 | 2021-04-16 | 美敦力瓦斯科尔勒公司 | FFR catheter with suspended pressure sensor and method of making same |
| CN113520354A (en) * | 2018-12-31 | 2021-10-22 | 深圳北芯生命科技股份有限公司 | Catheter simulator for pressure measuring catheter |
| CN113520354B (en) * | 2018-12-31 | 2023-06-13 | 深圳北芯生命科技股份有限公司 | Catheter simulator for pressure measuring catheter |
| CN112294278A (en) * | 2019-08-02 | 2021-02-02 | 深圳北芯生命科技有限公司 | Intravascular pressure measuring catheter |
| CN112294278B (en) * | 2019-08-02 | 2023-10-20 | 深圳北芯生命科技股份有限公司 | Intravascular pressure measuring catheter |
| CN111603152A (en) * | 2020-04-26 | 2020-09-01 | 杨铭轲 | Invasive blood pressure measuring device |
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Address after: Area E, 3 / F, building 3, Tingwei Industrial Park, No.6 Liufang Road, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Beixin Life Technology Co.,Ltd. Address before: Area E, 3 / F, building 3, Tingwei Industrial Park, No.6 Liufang Road, Xin'an street, Bao'an District, Shenzhen City, Guangdong Province Patentee before: INSIGHT LIFETECH Co.,Ltd. (SHENZHEN ) |
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