CN113397615A - Intra-lumen constant-pressure feedback injector and use method thereof - Google Patents

Intra-lumen constant-pressure feedback injector and use method thereof Download PDF

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CN113397615A
CN113397615A CN202110721003.4A CN202110721003A CN113397615A CN 113397615 A CN113397615 A CN 113397615A CN 202110721003 A CN202110721003 A CN 202110721003A CN 113397615 A CN113397615 A CN 113397615A
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pressure feedback
rod
syringe
elastic
feedback system
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CN113397615B (en
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王春生
孙勇新
康乐
贾昊
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Zhongshan Hospital Fudan University
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Zhongshan Hospital Fudan University
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/08—Accessories or related features not otherwise provided for
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00743—Type of operation; Specification of treatment sites
    • A61B2017/00778—Operations on blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/06—Measuring instruments not otherwise provided for
    • A61B2090/064—Measuring instruments not otherwise provided for for measuring force, pressure or mechanical tension
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B90/00—Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
    • A61B90/08—Accessories or related features not otherwise provided for
    • A61B2090/0807—Indication means

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  • Life Sciences & Earth Sciences (AREA)
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Abstract

The application provides an intracavity constant pressure feedback injector and a using method thereof. The pressure-setting feedback injector in the pipe cavity comprises a pressure feedback injection cylinder, a pressure-setting feedback system and a push rod; the front end of the pressure feedback injection cylinder is provided with an opening connected with the constant pressure feedback system, and the opening is used for transmitting the pressure of the pressure feedback injection cylinder to the constant pressure feedback system; the constant pressure feedback system is provided with an elastic sealing film and a vibration rod, the pushing rod is pushed to inject, when the pressure in the pressure feedback injection cylinder exceeds the protective pressure of 200mmHg, the constant pressure feedback system is triggered, the elastic sealing film deforms backwards to drive the vibration rod to displace backwards and downwards, and then the vibration rod is driven to generate surface displacement with the pushing rod, and the vibration rod generates vibration and conducts to the pushing rod.

Description

Intra-lumen constant-pressure feedback injector and use method thereof
Technical Field
The application relates to the field of surgical instruments, in particular to an intracavity constant pressure feedback injector and a using method thereof, which are used for treating vein bridge blood vessels in coronary artery bypass grafting operation.
Background
Coronary artery bypass grafting (called coronary artery bypass grafting for short) refers to the process of connecting the aorta with the narrow distal end of the coronary artery by using the blood vessel of other part of the body to rebuild the blood circulation in the ischemic region, which is a surgical means for treating coronary atherosclerotic heart disease (called coronary heart disease for short). In bypass surgery, veins are often used as the vascular bridging material. When a vein is on the body, the proximal end is called the proximal end and the distal end is called the distal end. The venous lumen has a venous valve, so that blood can only flow back from the distal end to the proximal end. Therefore, the bridge vessel obtained during the operation has only one blood flow direction. In the bypass operation, a vein end which is originally at the far end of the human body is used as the near end of a bypass blood vessel and is anastomosed to the aorta; the vein close to the heart end of the human body is anastomosed to the target blood vessel. Namely: the proximal sense of the bridged vessel is equivalent to the distal sense of the vein; the distal meaning of the bridged vessel is equivalent to the proximal meaning of the vein.
At present, the pretreatment before use of the vein bridge blood vessel comprises the following steps: (1) securing the distal end of the vein to the opening of the syringe filled with intravenous saline using a suture, clamping the distal end of the vein closed; (2) injecting saline into the vein by using an injector to enable the vein to be gradually filled from near to far, so that the leakage of the branch on the filled vein to the outside of the blood vessel can be seen; (3) all branches on the whole vein-bridge vessel are ligated in turn. However, in current treatments, it may occur that when the pressure in the bridge vessel exceeds the value that can be withstood in a physiological state, the intimal material of the vessel is already damaged, although the bridge vessel can now withstand this pressure in a physical state. The used vein bridge blood vessel has the probability of generating restenosis, and the long-term patency rate directly influences the survival rate of patients after coronary bypass surgery. Proved by experimental tests, the water injection pressure of the operation bridge blood vessel is usually more than 200mmHg, and the post-operation blood pressure control systolic pressure is usually below 140 mmHg.
At present, a common injector is used for injecting water into the bridge blood vessel in the operation, and no related instrument can limit the pressure in the bridge blood vessel. The overload of the pressure in the bridge blood vessel can cause the injury of the intima, media and adventitia of the blood vessel, promote the restenosis of the blood vessel and have the beneficial effect of controlling the pressure in the bridge blood vessel. And the long-term effect of the bypass operation can be facilitated by controlling the pressure in the bypass blood vessel.
Disclosure of Invention
The application designs a pressure feedback device in bridge blood vessel lumen, when the pressure in the bridge blood vessel surpassed the protection pressure, triggered pressure valve and drove a series of connecting device, and surface displacement takes place for inside sawtooth, and elastic material produces vibrations and conduction, and this vibrations sense of touch is perceived by the art person. The proper pressure can protect the blood vessel bridge, improve the long-term effect of the operation and improve the survival rate of the patient. The direction of the liquid outlet of the syringe is defined as the integral front end of the instrument, and the direction of the push rod is defined as the integral rear end of the instrument.
The application provides a constant pressure feedback injector in a tube cavity, which is characterized by comprising a pressure feedback injection tube, a constant pressure feedback system and a push rod;
the front end of the pressure feedback injection cylinder is provided with an injection cylinder outlet and an opening connected with the constant pressure feedback system, and the opening is used for transmitting the pressure of the pressure feedback injection cylinder to the constant pressure feedback system;
the constant pressure feedback system is used for transmitting vibration to the propulsion rod;
preferably, the outer surface of the pressure feedback injection cylinder is provided with a straight track along the long axis direction, and the push rod is provided with a sawtooth sliding rod which can slide in the straight track.
Preferably, the constant pressure feedback system has an elastic sealing film for sealing the constant pressure feedback system; the constant pressure feedback system is also provided with a vibration rod which is connected with the elastic sealing membrane.
Preferably, the constant pressure feedback system further has a chamber for defining the shock rod; the vibration rod is further provided with a front small column and a cuboid sliding block, the cuboid sliding block is arranged in the small chamber and can slide, and the front small column penetrates through the front wall of the small chamber and connects the elastic sealing membrane with the cuboid sliding block together.
Preferably, the front end of the straight track is connected with the constant pressure feedback system, the rear end of the straight track is not closed, and the straight track and the pressure feedback injection cylinder are stopped at the same tangent plane.
Preferably, a syringe fixing shaft perpendicular to the long axis direction is arranged at the midpoint of the straight track, and two ends of the syringe fixing shaft are fixedly connected with the semi-cylindrical shell.
Preferably, the sawtooth sliding rod is composed of a sliding rod and sawteeth. The sawtooth sliding rod is arranged on the edge of the rod handle and extends in parallel in the long axis direction of the push rod, and when the push rod is pushed into the pressure feedback injection cylinder in use, the sawtooth sliding rod can be pushed into the rear end of the straight track in a matching manner; the section of the sliding rod, which is vertical to the long shaft, is matched with the section of the straight track; the section of the convex sawtooth of the sliding rod is matched with the opening of the straight track; the tooth width of the saw teeth is equal to the width of the opening section of the straight track.
Preferably, the outer side surface of the syringe outlet is provided with a groove for clamping and fixing a suture for ligating the proximal end of the bridge vessel.
With the above-described intraluminal constant pressure feedback syringe, the elastic sealing membrane prevents the liquid in the pressure feedback syringe from flowing behind the elastic sealing membrane, and the elastic modulus of the elastic sealing membrane is set to a physiologically safe pressure value of 200 mmHg.
Preferably, the vibration rod has an elastic rod disposed in the straight rail.
Preferably, the elastic rod is arranged in parallel to the long axis direction of the pressure feedback syringe; the elastic rod is provided with an elastic rod steering part, the elastic rod steering part is arranged in the middle of the elastic rod, the rear end of the elastic rod is provided with an inverse folding part, the inverse folding part is in an angular shape, and an angular tip part of the elastic rod faces to the outer surface of the pressure feedback injection cylinder.
The application also provides a using method of the intra-lumen constant pressure feedback injector, which is characterized in that the intra-lumen constant pressure feedback injector is adopted to fully absorb the intravenous saline, and the outer side surface of the outlet of the injection tube is provided with a groove for clamping and fixing a suture for ligating the proximal end of the bridge blood vessel;
step one, pushing the push rod to inject;
step two, when the pressure in the pressure feedback injection cylinder rises and exceeds the maximum value which can be borne under the physiological state by 200mmHg, the constant pressure feedback system is triggered;
and step three, the elastic sealing film of the constant pressure feedback system deforms and protrudes backwards to drive the vibration rod of the constant pressure feedback system to displace, so that the vibration rod is driven to be in contact with the propelling rod, and the vibration rod vibrates and conducts the vibration to the propelling rod.
The utility model provides a feedback syringe is pressed to lumen internal fixation, in the operation of taking a bridge, when the intravascular pressure of bridge surpasss protective pressure, triggers level pressure feedback system, elasticity seal membrane is deformation backward, with elasticity seal membrane is connected the vibrations pole is displacement backward, drives the elasticity pole is displacement backward, with moving forward propulsion pole sawtooth slide bar interact, the elasticity pole with the surface displacement takes place for the sawtooth slide bar, the elasticity pole produces vibrations and conducts extremely the sawtooth slide bar, the suggestion this moment the intravascular pressure of bridge is overload state. The operator adjusts the pushing pressure, and the proper pressure can protect the blood bridge, improve the long-term effect of the operation and improve the survival rate of the patient.
Drawings
FIG. 1 is a schematic view of the overall structure of an intracavity constant pressure feedback injector according to the present application;
FIG. 2 is a schematic view of a pressure feedback syringe of the present application;
FIG. 3 is a schematic structural diagram of a constant pressure feedback system according to the present application;
FIG. 4 is a schematic view of a vibration rod of the constant pressure feedback system of the present application;
FIG. 5 is a schematic view of a push rod of the present application;
FIG. 6 is a schematic cross-sectional view taken along line A-A of the present application;
FIG. 7 is a schematic cross-sectional view taken along line B-B of the present application;
FIG. 8 is a flow chart of a method of use of the present application.
Detailed Description
For a further understanding of the present application, preferred embodiments of the present application are described below in conjunction with the attached drawings and examples, but it should be understood that these descriptions are merely intended to further illustrate features and advantages of the present application and are not intended to limit the claims of the present application.
The application is not limited in scope by the description of the embodiments. It is also within the scope of the present disclosure and protection that certain features of the same or similar prior art methods and embodiments may be interchanged.
In the drawings and the description that follows, like reference numerals designate like or identical elements, and the present application defines the outlet port of the syringe barrel as the forward end of the device as a whole and the ram as the rearward end of the device as a whole.
In bypass surgery, veins are often used as the vascular bridging material. When a vein is on the body, the proximal end is called the proximal end and the distal end is called the distal end. The venous lumen has a venous valve, so that blood can only flow back from the distal end to the proximal end. Therefore, the bridge vessel obtained during the operation has only one blood flow direction. In the bypass operation, a vein end which is originally at the far end of the human body is used as the near end of a bypass blood vessel and is anastomosed to the aorta; the vein close to the heart end of the human body is anastomosed to the target blood vessel. Namely: the proximal sense of the bridged vessel is equivalent to the distal sense of the vein; the distal meaning of the bridged vessel is equivalent to the proximal meaning of the vein.
Referring to fig. 1, the present application provides an intracavity constant pressure feedback injector, which comprises a pressure feedback syringe 1, a constant pressure feedback system 2 and a push rod 3.
As shown in fig. 1 and 2, the pressure feedback injection tube 1 is a cylindrical structure, the front end of the pressure feedback injection tube is provided with an injection tube outlet 11 and an opening connected with the constant pressure feedback system 2, and the rear end of the pressure feedback injection tube is provided with an injection tube fixing wing; the outer side surface of the syringe outlet 11 is provided with a groove 12 for clamping and fixing a suture for ligating the proximal end of the bridge vessel. A straight track 14 is arranged on the outer surface of the pressure feedback syringe 1 along the long axis direction, the straight track in the embodiment is a C-shaped straight track, and the outer part of the C-shaped straight track 14 is sealed by a semi-cylindrical shell; the C-shaped opening of the C-shaped straight track 14 is opposite to the outer surface of the pressure feedback syringe 1. The front end of the C-shaped straight track 14 is connected with the constant pressure feedback system 2, the rear end is not closed, and the C-shaped straight track and the pressure feedback injection cylinder 1 are stopped at the same tangent plane. A syringe fixing shaft 13 perpendicular to the long axis direction is arranged at the approximate midpoint of the C-shaped straight track 14, and two ends of the syringe fixing shaft 13 are fixedly connected with the semi-cylindrical shell and are parallel to the connecting line of the C-shaped openings of the C-shaped straight track.
As shown in fig. 3, the constant pressure feedback system 2 is disposed at the front end of the pressure feedback syringe 1, and the front end of the constant pressure feedback system 2 is connected to an opening on the front contact surface of the pressure feedback syringe 1, and is used for conducting the air in the pressure feedback syringe 1 to the constant pressure feedback system 2; the rear end of the constant pressure feedback system 2 is connected with the semi-cylindrical shell of the C-shaped straight track 14. The constant pressure feedback system 2 comprises an elastic sealing film 21, a chamber 27 and a vibration rod. The elastic sealing film 21 is arranged at the rear part of the opening on the front contact surface of the pressure feedback syringe 1 and is connected with the front small column 22 of the vibration rod, so that the constant pressure feedback system 2 is completely closed on the section surface. Cell 27 sets up in this elasticity sealing membrane 21 rear, and cell 27 is inside to be cuboid hollow structure, and cell front wall, back wall all are equipped with trompil 25, 26, and the vibrations pole passes this cell 27 through this trompil 25, 26.
As shown in fig. 4, the vibration rod is composed of a front pillar 22, a rectangular parallelepiped slider 23, and an elastic rod 24, the front pillar 22 and the rectangular parallelepiped slider 23 of the vibration rod are disposed in the constant pressure feedback system 2, and the elastic rod 24 is disposed in the straight rail 14. The front end of the front small column 22 is fixedly connected with the center of the elastic sealing membrane 21, the outer diameter of the front small column 22 is basically equal to the inner diameter of the front wall opening 25 of the small chamber, and the front small column can slide in the front wall opening 25 of the small chamber; the rear end of the front small column 22 is fixedly connected with the front end of the cuboid sliding block 23. The length and width of the cross section of the rectangular parallelepiped sliding block 23 are substantially equal to those of the cross section of the small chamber 27, the length of the rectangular parallelepiped sliding block 23 in the long axis direction is smaller than that of the small chamber 27, and the difference between the long axis lengths of the small chamber 27 and the rectangular parallelepiped sliding block 23 is LCell-slide blockAnd the sum of the length of the major axis of the anterior columella 22 and the thickness of the anterior wall of the chamber 27 is LFront pillar + front wall thicknessWherein L isCell-slide block<LFront pillar + front wall thicknessThe rectangular parallelepiped block 23 is slidable in the small chamber 27. The rear end of the cuboid slider 23 is fixedly connected with the front end of the elastic rod 24. The elastic rod 24 is arranged in parallel to the long axis direction of the pressure feedback injection cylinder 1; the elastic rod 24 has an elastic rodA steering part 28, wherein the steering part 28 is disposed in the middle of the elastic rod 24 and is formed by a concave arc surface with a longitudinal length of 5mm and a depth of 0.5mm, and the lowest point of the arc surface is closer to the outer surface of the pressure feedback syringe 1, and the syringe fixing shaft 13 is disposed in the concave arc surface; the rear end of the elastic rod 24 has a reverse folding part 29, the reverse folding part 29 is in an angular shape, and the angular tip part of the reverse folding part 29 is consistent with the direction of the cambered surface of the turning part 28 and faces the outer surface of the pressure feedback injection cylinder 1.
As shown in fig. 5, the push rod 3 is composed of an elastic soft piston 31, a main push rod 32, a stem 33, and a saw-tooth slide rod 34. The flexible piston 31 is fixedly connected with a main propelling rod 32, the rear end of the main propelling rod 32 is a rod handle 33, and a sliding rod 34 with saw teeth is arranged on the edge of the rod handle 33. The outer diameter of the flexible piston 31 is matched with the inner diameter of the pressure feedback injection cylinder 1, and the pushing rod 3 can be pushed in a sealing way. The major axis length of the main ram 32 matches, and is generally equal to, the length of the pressure feedback syringe 1. The lever handle 33 is a circular plate-like structure and is disposed at the rear end of the main propulsion lever 32. The saw slide 34 is composed of a slide bar and saw teeth 35. The sawtooth sliding rod 34 is disposed on the edge of the rod handle 33, and extends in parallel with the long axis direction of the main push rod 32, and when the flexible soft piston 31 of the push rod 3 is pushed into the pressure feedback syringe 1 in use, the sawtooth sliding rod 34 can be pushed into the rear end of the straight rail 14 in a matching manner.
As shown in fig. 6 and 7, the cross section of the sliding rod perpendicular to the long axis matches the cross section of the C-shaped straight rail 14; the section of the convex sawtooth 35 of the sliding rod is matched with the C opening of the C-shaped straight track 14, and the section width of the C opening is matched with the section width of the sawtooth 35; the saw teeth 35 can be preferably set as straight gears, the tooth pitch is 0.5mm, the tooth total height is 0.5mm, and the tooth width is the same as the cross section width of the C-shaped opening.
As shown in fig. 8, the using method of the intraluminal pressure feedback injector specifically comprises the following steps: step one, sucking venous saline fully by the intracavity constant pressure feedback injector, sleeving the near end of the bridge blood vessel into the outlet of the injection cylinder, and clamping and locking the near end of the bridge blood vessel at the groove by a suture; step two, pushing the main push rod to inject; step three, when the pressure in the pressure feedback injection cylinder rises and exceeds the maximum value which can be borne under the physiological state by 200mmHg, the constant pressure feedback system is triggered; and step four, the elastic sealing film deforms and protrudes backwards to drive the vibration rod to displace, so that the elastic rod is driven to be in contact with the sawtooth sliding rod, and the elastic rod vibrates and conducts the vibration to the sawtooth sliding rod.
When the constant pressure feedback system is not triggered:
when treating a blood bridge in an operation, firstly, the rod handle 33 is pushed, so that the main push rod 32 and the elastic soft piston 31 fixedly connected with the main push rod move forwards in the pressure feedback injection cylinder 1, and simultaneously, the sawtooth sliding rod 34 integrated with the rod handle 33 slides forwards in the C-shaped straight track 14; air in the pressure feedback injection tube 1 is emptied, and the rod handle 33 is pulled to suck the prepared venous saline; the proximal end of the bridge blood vessel is sleeved into the outlet 11 of the injection cylinder after being properly expanded, exceeds the groove 12 on the outer side surface of the outlet, and is ligated and locked at the groove 12 by using a suture; occluding the distal end of the bridged vessel using an appropriate force; the stem handle 33 is pushed slightly, and the intravenous saline in the pressure feedback syringe 1 flows into the bridge vessel from the syringe outlet 11; the saline accumulation speed of the vein in the bridge vessel is higher than the leakage speed of the vein saline from the branch of the bridge vessel, the bridge vessel expands, the saline leaks out and is visible from the branch, and the branch is tied by the operator; the sawtooth slide 34 does not interfere with the spring rod diverter 28 throughout.
Triggering overload feedback by a constant-voltage feedback system:
the elastic modulus of the elastic sealing film 21 is set to a physiologically safe pressure value of 200 mHg. The pressure in the pressure feedback syringe 1 and the bridge vessel is regarded as hydrostatic pressure, and the pressure in the pressure feedback syringe 1 is equal to the pressure in the bridge vessel. When the pressure in the blood bridge exceeds the maximum value which can be borne under the physiological state, the pressure is borne by the elastic sealing film 21 and generates deformation, and the elastic sealing film 21 protrudes backwards; the elastic sealing film 21 is fixedly connected with the front small column 22 to enable the front small column 22 to generate backward displacement, and the front small column 22 is restrained by the opening 25 of the front wall of the small chamber to slide backwards; the rectangular block 23 integral with the front pillar is constrained by the cell 27 and slides backwards; the elastic rod 24 integrated with the rectangular parallelepiped sliding block 23 is restrained from sliding backward by the small chamber rear wall opening 26; the deflection part 28 of the elastic rod 24 interacts with the syringe fixing shaft 13 when being displaced backwards, and the produced event is that the elastic rod inflection point 29 at the tail part of the elastic rod 24 produces downward displacement; the edge of the reverse folding part 29 and the saw teeth 35 on the saw tooth slide bar 34 which is advancing generate displacement in the horizontal direction, so the elastic bar 24 generates tiny vibration in the vertical direction, and the operator is prompted that the pressure in the bridge blood vessel is in an overload state at the moment.
After the operator senses the vibration, the force applied to the rod handle 33 is reduced, and the pressure of the pressure feedback syringe 1 is reduced; the hydrostatic pressure to which the elastic sealing film 21 is subjected decreases; when the stress of the elastic sealing film 21 is smaller than the minimum pressure for deforming the elastic sealing film, the elastic sealing film 21 retracts, and the deformation disappears; the front small column 22 fixedly connected with the elastic sealing membrane 21 generates forward displacement and is restrained by the opening 25 of the front wall of the small chamber to slide forward; the cuboid slider 23 integrated with the front pillar is constrained by the small chamber 27 to slide forwards; the elastic rod 24 integral with the rectangular parallelepiped sliding block 23 slides forward; the steering part 28 of the elastic rod 24 is separated from the syringe fixing shaft 13 when moving forwards, and the generated event is that the elastic rod inflection point 29 at the tail part of the elastic rod 24 moves upwards; the edge angle of the reverse folding part 29 does not generate horizontal displacement with the saw teeth 35 on the saw tooth slide bar 34 any more, and the vibration stops, thus prompting that the pressure in the bridge blood vessel is proper.
At the same time, it should be noted that when the pressure in the pressure feedback syringe 1 exceeds the protection pressure, although the protection mechanism is triggered, the device can still operate, and the push rod 3 can still push, and will not lock, that is: if the operator considers that higher water pressure is still needed to treat the vein-bridge blood vessel when the bridge blood vessel reaches the injury pressure, high pressure can still be continuously exerted through the push rod 3, but the vibration generated by the interaction of the constant pressure feedback system 2 and the sawtooth slide rod 34 can continuously indicate that the pressure in the bridge blood vessel is overloaded.
The description and applications of the present application are illustrative and are not intended to limit the scope of the present application to the embodiments described above. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present application may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the present application.

Claims (18)

1. A constant pressure feedback injector in a tube cavity is characterized by comprising a pressure feedback injection tube, a constant pressure feedback system and a push rod;
the front end of the pressure feedback injection cylinder is provided with an injection cylinder outlet and an opening connected with the constant pressure feedback system, and the opening is used for transmitting the pressure of the pressure feedback injection cylinder to the constant pressure feedback system;
the constant pressure feedback system is used for transmitting vibration to the push rod.
2. The intraluminal pressure feedback syringe of claim 1,
the outer surface of the pressure feedback injection cylinder is provided with a straight track along the long axis direction, the push rod comprises a rod handle and a sawtooth sliding rod, and the sawtooth sliding rod can slide in the straight track;
the constant pressure feedback system is provided with an elastic sealing film for sealing the constant pressure feedback system;
the constant pressure feedback system is also provided with a vibration rod which is connected with the elastic sealing membrane.
3. The intraluminal pressure feedback syringe of claim 2 wherein the pressure feedback system further has a chamber defining the shock rod;
the vibration rod is further provided with a front small column and a cuboid sliding block, the cuboid sliding block is arranged in the small chamber and can slide, and the front small column penetrates through the front wall of the small chamber and connects the elastic sealing membrane with the cuboid sliding block together.
4. The intraluminal pressure feedback syringe of claim 3, wherein the length and width of the cross-section of the cuboid slider are substantially equal to the length and width of the cross-section of the chamber, and the length of the cuboid slider in the long axis direction is less than the long axis length of the chamber.
5. The intraluminal pressure feedback syringe of claim 2, wherein the front end of the straight rail is connected to the pressure feedback system, and the rear end is not closed, and ends in the same tangent plane as the pressure feedback syringe.
6. The intraluminal pressure feedback injector of claim 2, wherein a syringe fixing shaft perpendicular to the long axis direction is disposed at the middle point of the straight track, and both ends of the syringe fixing shaft are fixedly connected to the semi-cylindrical housing.
7. The intraluminal pressure feedback syringe of claim 2, wherein the sawtooth slide bar is comprised of a slide bar and sawteeth, the sawtooth slide bar is disposed on the edge of the stem, extending parallel to the long axis of the push bar, and is adapted to be pushed into the rear end of the straight track when the push bar is pushed into the pressure feedback syringe in use; the section of the sliding rod, which is vertical to the long shaft, is matched with the section of the straight track; the section of the convex sawtooth of the sliding rod is matched with the opening of the straight track; the tooth width of the saw teeth is equal to the width of the opening section of the straight track.
8. The intraluminal pressure feedback syringe of claim 1, wherein the outside of the syringe barrel outlet is provided with a notch for snap-locking a suture that ligates the proximal end of the bridge vessel.
9. The intraluminal pressure feedback syringe of any one of claims 2-8, wherein the elastic sealing membrane prevents fluid in the pressure feedback barrel from flowing behind the elastic sealing membrane, and the elastic modulus of the elastic sealing membrane is set to a physiologically safe pressure value of 200 mmHg.
10. The intraluminal pressure feedback injector of claim 9, wherein the shock rod has a resilient rod disposed in the straight track.
11. The intraluminal pressure feedback syringe of claim 10, wherein the resilient lever is disposed parallel to the long axis of the pressure feedback syringe; the elastic rod is provided with an elastic rod steering part, and the elastic rod steering part is arranged in the middle of the elastic rod; the rear end of the elastic rod is provided with a reverse folding part.
12. The intraluminal pressure feedback syringe of claim 11, wherein the reverse bend of the resilient lever is angular, with the angular apex facing the outer surface of the pressure feedback syringe.
13. An intracavity constant pressure feedback injector is characterized by comprising the pressure feedback injection cylinder, the constant pressure feedback system and the push rod; and when the pressure in the pressure feedback injection cylinder exceeds the maximum value which can be borne in a physiological state by 200mmHg, the constant pressure feedback system is triggered.
14. The intraluminal pressure feedback syringe of claim 13 wherein the pressure feedback system has a flexible sealing membrane, a shock rod connected to the flexible sealing membrane, wherein upon activation of the pressure feedback system, the flexible sealing membrane deforms rearwardly causing the shock rod to displace rearwardly and downwardly interacting with the advancing rod moving forwardly, the shock rod displaces outwardly of the advancing rod, the shock rod vibrates and is conducted to the advancing rod.
15. The intraluminal pressure feedback syringe of claim 14, wherein when the pressure in the pressure feedback syringe drops below 200mmHg, the elastic sealing membrane returns to its original shape, driving the vibration rod to displace forward and upward, the vibration rod disengages from the push rod, and the vibration stops.
16. A use method of a constant pressure feedback injector in a tube cavity is characterized in that,
when the intraluminal pressure feedback syringe as defined in any one of claims 1-15 is used, such that the intraluminal pressure feedback syringe is filled with intravenous saline, the outside of the outlet of said syringe barrel is provided with a groove for snap-locking a suture for ligating the proximal end of the bridge vessel;
step one, pushing the push rod to inject;
step two, when the pressure in the pressure feedback injection cylinder rises and exceeds the maximum value which can be borne under the physiological state by 200mmHg, the constant pressure feedback system is triggered;
and step three, the elastic sealing film of the constant pressure feedback system deforms and protrudes backwards to drive the vibration rod of the constant pressure feedback system to displace, so that the vibration rod is driven to be in contact with the propelling rod, and the vibration rod vibrates and conducts the vibration to the propelling rod.
17. The method of using an intraluminal pressure feedback syringe of claim 16 wherein in step three, the shock rod displacement is: the elastic sealing film deforms backwards to drive the cuboid slider connected with the elastic sealing film to displace backwards, and then the elastic rod of the vibration rod is driven to displace backwards; when the steering part of the elastic rod moves backwards, the steering part of the elastic rod interacts with the fixed shaft of the pressure feedback injection cylinder, so that the reverse-folding part of the elastic rod at the tail part of the elastic rod generates downward displacement, and the edge angle of the reverse-folding part is in contact with the sawtooth sliding rod of the pushing rod which is pushing forwards.
18. The method of using an intraluminal pressure feedback syringe of claim 17 wherein the trigger the pressure feedback system, the resilient lever vibrates and transmits to the sawtooth slide bar while the main push rod continues to advance.
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Citations (6)

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Publication number Priority date Publication date Assignee Title
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CN211863495U (en) * 2020-01-20 2020-11-06 中国人民解放军陆军军医大学第二附属医院 Syringe with pressure measuring function

Patent Citations (6)

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Publication number Priority date Publication date Assignee Title
SU1174036A1 (en) * 1984-03-11 1985-08-23 Омский Государственный Ордена Трудового Красного Знамени Медицинский Институт Им.М.И.Калинина Instrument for placing sutures
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