CN113926061B - Balloon catheter - Google Patents
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- CN113926061B CN113926061B CN202111368838.2A CN202111368838A CN113926061B CN 113926061 B CN113926061 B CN 113926061B CN 202111368838 A CN202111368838 A CN 202111368838A CN 113926061 B CN113926061 B CN 113926061B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1011—Multiple balloon catheters
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/10—Balloon catheters
- A61M25/1018—Balloon inflating or inflation-control devices
- A61M25/10184—Means for controlling or monitoring inflation or deflation
- A61M25/10185—Valves
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0212—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument inserted into a body lumen, e.g. catheter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/02—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques
- A61B2018/0293—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by cooling, e.g. cryogenic techniques using an instrument interstitially inserted into the body, e.g. needle
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Abstract
The invention relates to a balloon catheter, which comprises a first balloon body, a second balloon body, a connecting pipe, a first control valve and a second control valve, wherein: the connecting pipe is connected with the first bag body and the second bag body and is provided with a first channel and a second channel which are arranged at intervals and are respectively communicated with the first bag body and the second bag body; the first control valve is arranged in the second channel and communicated with the second capsule body in a one-way; the second control valve is arranged in the first channel and communicated with the first capsule in a one-way mode; when the inflation plugging is carried out and the pressure difference between the first bag body and the second bag body is larger than a set value, the first control valve is switched to be opened; when the air is exhausted and the pressure difference between the second capsule body and the first capsule body is greater than a set value, the second control valve is switched to be opened; the first bag body and the second bag body use the same air inlet and evacuation pipeline, so that the pipe diameter of the balloon catheter is not greatly changed, the first control valve and the second control valve are automatically opened and closed, double-bag plugging can be realized, and the pressure, the temperature and the refrigerating capacity in the first bag body cannot be influenced.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a balloon catheter.
Background
Atrial fibrillation is common persistent arrhythmia, and the freezing balloon catheter treats atrial fibrillation by releasing a freezing source to cause myocardial cells of muscle sleeves at the connection part of a pulmonary vein and a left atrium to disintegrate and necrose to cause electric conduction block.
The treatment process comprises the following steps: starting up in advance, connecting a balloon catheter, connecting a circuit, puncturing, conveying the catheter, inflating and blocking, detecting the blocking condition, freezing treatment, exhausting and vacuumizing, and finishing, wherein the inflating and blocking are divided into four grades: the complete plugging is IV grade, a small amount of leakage is III grade, the leakage amount is mostly II grade, the contrast agent instantly flows out of the pulmonary vein to be I grade, the plugging condition is judged according to the attaching degree of the saccule and the pulmonary vein, and the treatment effect is indirectly judged. When the plugging grade is III, the success rate of the pulmonary vein CPVI is 31 percent; at an occlusion rating of iv, the pulmonary vein CPVI was 62%. After the pulmonary vein is blocked by the balloon, the blood pressure of the pulmonary vein is increased, when the blockage is incomplete, a small amount of blood flows out from a gap between the pulmonary vein and the balloon, the refrigerating capacity can be taken away by the blood, the surface temperature of the balloon is increased, the temperature in a target tissue is high, and the target tissue does not reach the temperature required by irreversible damage.
The existing improved plugging condition has the following mode that in the first mode, two balloons respectively adopt independent air/liquid supply catheters, but the two balloons at least need four transportation catheters, the pipe diameters of the catheters can become larger, two sets of control components and platforms are needed, and when the same vacuum pump is used for vacuum pumping, the pressure in the plugging balloon and the balloons in cryotherapy have pressure difference, so that gas backflow is caused, and the tearing of the blood vessel wall is easy to occur. When only double vacuum pumps are used for vacuum pumping, the control and the structure of the instrument become very complicated, the probability of the instrument failure is increased, and the method consumes more refrigerating gas; in the second mode, the two balloons share one air supply/liquid guide pipe, but the influence on a refrigeration system is large, when the original flow is maintained, the pressure in the balloons is reduced, the blocking effect of the balloons is greatly reduced, and the condition that the balloons are not completely unfolded due to too low pressure in the balloons can occur; when the flow of the refrigerating gas is increased, the refrigerating capacity of the cryoablation balloon is increased, the surface temperature of the balloon is reduced, and the occurrence probability of complications is increased.
Disclosure of Invention
Therefore, it is necessary to provide a balloon catheter for solving the problems that the balloon catheter has a very high influence on a refrigeration system and cannot achieve a good blocking effect.
The invention provides a balloon catheter, which comprises a first balloon body, a second balloon body, a connecting pipe, a first control valve and a second control valve, wherein:
the connecting pipe is connected with the first balloon and the second balloon and is provided with a first channel and a second channel which are arranged at intervals and are respectively communicated with the first balloon and the second balloon;
the first control valve is arranged in the second channel and communicated with the second bag body in a one-way mode;
the second control valve is arranged in the first channel and communicated with the first capsule in a one-way mode;
when the inflatable plug is used and the pressure difference between the first bag body and the second bag body is larger than a set value, the first control valve is switched to be opened; and when the air is pumped and the pressure difference between the second capsule and the first capsule is greater than the set value, the second control valve is switched to be opened.
In one embodiment, the set value is 1kPa to 6.5kPa.
In one embodiment, the first bladder is made of a non-compliant material.
In one embodiment, the material of the first bladder is PET or PA.
In one embodiment, the second bladder is made of a compliant material or a super-compliant material.
In one embodiment, the material of the second bladder is one of PU, TPE, TPR.
In one embodiment, the balloon catheter further comprises an inner tube extending through the first balloon and communicating with the connecting tube, and a mapping catheter extending through the inner tube and into and out of the connecting tube.
In one embodiment, the middle region of the connecting tube is provided with a through hole, and the mapping catheter penetrates through the through hole and is connected with the connecting tube in a sealing mode.
In one embodiment, the first control valve includes a first valve body, a first connecting shaft, a first sealing member, and a first elastic member, wherein:
the first valve body is a cavity with openings at two ends and is fixed in the second channel;
the first connecting shaft is of a dumbbell-shaped structure with bulges at two ends and comprises a first section, a second section and a third section, the first section is positioned in the first valve body, the third section is positioned outside the first valve body, and the second section can extend out of the first valve body;
the first elastic piece is sleeved on the second section and can be abutted against the first section and the inner wall of the first valve body;
the first sealing element is sleeved on the second section and positioned outside the first valve body, and can be abutted against the third section and the outer wall of the first valve body.
In one embodiment, the second control valve includes a second valve body, a second connecting shaft, a second sealing member, and a second elastic member, wherein:
the second valve body is a cavity with openings at two ends and is fixed in the first channel;
the second connecting shaft is of a dumbbell-shaped structure with protrusions at two ends and comprises a fourth section, a fifth section and a sixth section, the fourth section is located in the second valve body, the sixth section is located outside the second valve body, and the fifth section can extend out of the second valve body;
the second elastic piece is sleeved on the fifth section and can be abutted against the fourth section and the inner wall of the second valve body;
the second sealing element is sleeved on the fifth section and located outside the second valve body, and can be abutted against the sixth section and the outer wall of the second valve body.
Has the advantages that:
1. in the balloon catheter, the same air inlet and evacuation pipeline is used by the first balloon and the second balloon, so that the diameter of the balloon catheter is not changed greatly.
2. Among the above-mentioned sacculus pipe, carry out cryotherapy through first utricule, the shutoff is carried out to the second utricule, and when aerifing and the pressure differential of first utricule and second utricule is greater than the setting value, first control valve opens, and gas gets into the second utricule from first utricule and makes the second utricule be full of in order to play the effect of shutoff pulmonary vein.
3. Among the above-mentioned sacculus pipe, carry out cryotherapy through first utricule, the shutoff is carried out to the second utricule, when pumping air and the pressure differential of second utricule and first utricule is greater than the setting value, and the second control valve is opened, and gas gets into first utricule from the second utricule and makes the second utricule shrink, prepares to carry out treatment next time.
4. In the balloon catheter, the first control valve and the second control valve are automatically opened and closed through the pressure difference between the first balloon and the second balloon, so that double-balloon plugging can be realized, and the influence on the pressure, the temperature and the refrigerating capacity in the first balloon can be avoided.
5. In the balloon catheter, the second balloon body is limited to be the compliance/super-compliance balloon, so that the balloon catheter can deform according to the shape of the pulmonary vein and better block the pulmonary vein.
6. In the balloon catheter, after the pulmonary vein is blocked by the second balloon body, if a gap exists between the first balloon body and the pulmonary vein opening, blood in the pulmonary vein can enter an atrium and contract the pulmonary vein, so that the first balloon body can be completely blocked.
Drawings
FIG. 1 is a schematic structural view of a balloon catheter according to the present invention;
FIG. 2 is a left side view of the balloon catheter of FIG. 1;
FIG. 3 isbase:Sub>A cross-sectional view of the balloon catheter of FIG. 2 at location A-A;
FIG. 4 is an enlarged schematic view of the balloon catheter of FIG. 3 at position B;
FIG. 5 is a right side view of the balloon catheter of FIG. 1;
FIG. 6 is a cross-sectional view of the balloon catheter of FIG. 5 at a location C-C;
fig. 7 is an enlarged schematic view of the balloon catheter of fig. 6 at position D.
Reference numerals:
10. a balloon catheter;
110. a first bladder;
120. a second bladder;
130. a connecting pipe; 131. a first channel; 132. a second channel; 133. a through hole;
140. a first control valve; 141. a first valve body; 142. a first connecting shaft; 1421. a first stage; 1422. a second stage; 1423. a third stage; 143. a first seal member; 144. a first elastic member;
150. a second control valve; 151. a second valve body; 152. a second connecting shaft; 1521. a fourth stage; 1522. a fifth stage; 1523. a sixth stage; 153. a second seal member; 154. a second elastic member;
160. an inner tube;
170. a mapping catheter;
180. an outer tube.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
The technical scheme provided by the embodiment of the invention is described below by combining the accompanying drawings.
As shown in fig. 1, 2 and 3, the present invention provides a balloon catheter 10 for treating atrial fibrillation, the balloon catheter 10 including portions of a first balloon 110, a second balloon 120, a connecting tube 130, a first control valve 140 and a second control valve 150, wherein:
the two ends of the connection tube 130 are respectively connected with the first capsule 110 and the second capsule 120, the connection tube 130 is provided with a first channel 131 and a second channel 132, the first channel 131 and the second channel 132 are arranged at intervals, the first channel 131 is communicated with the first capsule 110 and the second capsule 120, and the second channel 132 is communicated with the first capsule 110 and the second capsule 120;
the first control valve 140 is disposed within the second passageway 132 and the first control valve 140 is in one-way communication with the second bladder 120;
when the inflation is blocked and the pressure difference between the first and second capsules 110 and 120 is greater than a set value, the first control valve 140 is switched from closed to open;
In the balloon catheter 10, before entering the human body, the vacuum state is maintained, after entering the human body, the balloon catheter starts to inflate with a smaller pressure, the gas firstly enters the first balloon 110, so that the first balloon 110 is inflated, and at the moment, the second balloon 120 can adjust the position in the left atrium to find a relatively better occlusion position; then increasing the pressure, the second balloon 120 is sealed, at this time, the pressure difference between the first balloon 110 and the second balloon 120 is increased, and when the pressure difference is increased to be greater than a set value, the first control valve 140 is switched from closed to open, so that gas enters the second balloon 120 from the first balloon 110, the pulmonary vein to be cryoablated is sealed, and the influence of the pressure change on the balloon gap is blocked, and after the second balloon 120 is sealed, if a gap exists between the first balloon 110 and the pulmonary vein, blood between the first balloon 110 and the second balloon 120 enters the atrium due to the atrial contraction, so that the pulmonary vein is contracted, the pulmonary vein orifice is completely attached to the first balloon 110, the first balloon 110 can start to be cryoablated, and at this time, the first balloon 110 and the second balloon 120 are independent of each other and do not influence each other; after the cryoablation is finished, the vacuum pump will evacuate the gas in the first balloon 110, and when the pressure difference between the second balloon 120 and the first balloon 110 is greater than the set value, the second control valve 150 is switched from off to on, so as to evacuate the gas in the second balloon 120, thereby facilitating the next treatment.
Thus, by defining the first balloon 110 and the second balloon 120 to use the same inlet and exhaust lines, the diameter of the balloon catheter 10 does not vary significantly; and the first capsule 110 is used for freezing treatment, and the second capsule 120 is used for occlusion, on one hand, when the first capsule 110 and the second capsule 120 are inflated and the pressure difference between the first capsule 110 and the second capsule 120 is greater than a set value, the first control valve 140 is opened, and gas enters the second capsule 120 from the first capsule 110 so that the second capsule 120 is inflated to achieve the effect of occluding the pulmonary vein; on the other hand, when the air is pumped and the pressure difference between the second balloon 120 and the first balloon 110 is greater than the set value, the second control valve 150 is opened, and the air enters the first balloon 110 from the second balloon 120 to make the second balloon 120 contract, so as to prepare for the next treatment; in addition, the automatic opening and closing of the first control valve 140 and the second control valve 150 is realized by the pressure difference between the first capsule 110 and the second capsule 120, so that the double-capsule blocking can be realized, and the pressure, the temperature and the refrigerating capacity in the first capsule 110 can not be influenced.
In order to obtain better use effect, the set value may be 1kPa to 6.5kPa in a preferred embodiment, and the set value is not limited to the above range, and may be other values that can satisfy the requirement.
In the balloon catheter 10, the set value is limited to be 1kPa-6.5kPa, so as to avoid the situations that the air tightness of the balloon catheter 10 is not good due to too small opening pressure difference, the pressure in the balloon catheter 10 is not enough and the blocking effect is not good due to too large opening pressure difference, and the withdrawal of the first balloon 110 and the second balloon 120 is influenced due to too much gas remaining in the balloon catheter 10. In a concrete setting, the set value may be 1kPa, 1.5kPa, 2kPa, 2.5kPa, 3kPa, 3.5kPa, 4kPa, 4.5kPa, 5kPa, 5.5kPa, 6kPa, 6.5kPa, although the set value is not limited to the above-mentioned value, and may be other values in the range of 1kPa to 6.5kPa.
The material of first balloon 110 has a plurality of types, and in a preferred embodiment, first balloon 110 may be made of a non-compliant material, and first balloon 110 made of the non-compliant material is attached to close the pulmonary vein ostium, so that it is ensured that the volume of first balloon 110 is not changed, and the pulmonary vein is prevented from being torn due to over-expansion of first balloon 110, and the change in the volume of first balloon 110 is prevented from affecting the flow rate of the system.
Specifically, the material of the first bag body 110 may be PET (polyethylene terephthalate) or PA (Polyamide), and PET has excellent physical and mechanical properties, creep resistance, fatigue resistance, and dimensional stability in a wide temperature range; PA has good comprehensive performance, mechanical property, heat resistance and dimensional stability. Of course, the material of the first bladder 110 is not limited thereto, and may be other non-compliant materials.
The material of the second balloon 120 is various, in a preferred embodiment, the second balloon 120 is made of a compliant material or a super-compliant material, and the second balloon 120 made of the compliant material or the super-compliant material can deform according to the shape of the pulmonary vein opening, so as to better attach and seal the pulmonary vein, thereby avoiding the increase of pressure in the pulmonary vein and causing blood leakage from the gap between the pulmonary vein and the balloon; when first utricule 110 and pulmonary vein are gapped, blood between second utricule 120 and the first utricule 110 can get into in the atrium, and this can lead to the pressure reduction in the pulmonary vein, and the pulmonary vein contracts by an appropriate amount to reach good shutoff effect, guaranteed the good adherence performance of second utricule 120, still can reduce the pressure to the blood vessel wall, when second utricule 120 overexpandes, second utricule 120 form can change, extends to the place that the resistance is little.
Specifically, the material of the second capsule body 120 may be one of PU (polyurethane), TPE (Thermoplastic Elastomer), TPR (Thermoplastic Rubber), PU has better stability, chemical resistance, resilience, and mechanical properties, and has smaller compression deformability; TPE and TPR are taken as thermoplastic structures, and have excellent physical properties and stable structures. Of course, the material of the second bladder 120 is not limited thereto, and may be other compliant materials or super-compliant materials.
To facilitate detection of changes in the electrical potential of the pulmonary vein between the first balloon 110 and the second balloon 120, a preferred embodiment, as shown in fig. 1, 3 and 4, the balloon catheter 10 further comprises an innerduct 160 and a mapping catheter 170, the innerduct 160 extending through the first balloon 110 and the innerduct 160 communicating with the connecting tube 130, the mapping catheter 170 extending through the innerduct 160 and the mapping catheter 170 extending into the connecting tube 130 with the mapping catheter 170 extending from the connecting tube 130; in particular arrangements, the balloon catheter 10 further includes an outer tube 180, the outer tube 180 being configured to be coupled to a side of the first balloon 110 distal from the second balloon 120, the inner tube 160 passing through the outer tube 180 and extending out of the outer tube 180, 160, the inner tube being of equal length to the outer tube 180; the actual length of the mapping catheter is greater than the outer tube 180, and the mapping catheter 170 marks the pulmonary vein potential through the inner tube 160 of the balloon catheter 10.
In the balloon catheter 10, the inner tube 160 is communicated with the connecting tube 130, the inner tube 160 is not communicated with the first balloon 110 and the second balloon 120, the mapping catheter 170 passes through the inner tube 160 and the connecting tube 130 and extends out of the connecting tube 130 to reach the position of the pulmonary vein, and the mapping catheter 170 can mark the potential of the pulmonary vein at the position of the pulmonary vein between the first balloon 110 and the second balloon 120, so that the effect of cryoablation treatment can be detected.
In order to improve the potential detection accuracy, as shown in fig. 5, 6 and 7, in particular, a through hole 133 is provided in the middle region of the connection tube 130, the mapping catheter 170 penetrates through the through hole 133, and the mapping catheter 170 is hermetically connected with the connection tube 130.
In the balloon catheter 10, the through hole 133 is formed in the middle region of the connecting tube 130, and the mapping catheter 170 penetrates through the through hole 133, so that the mapping catheter 170 penetrates out from the middle position between the first balloon 110 and the second balloon 120, and therefore the pulmonary vein potential at the middle pulmonary vein position between the first balloon 110 and the second balloon 120 can be detected, the potential detection accuracy is improved, and the cryoablation treatment effect can be better judged. By defining the mapping catheter 170 in sealed connection with the connecting tube 130 such that there is no infiltration gap between the mapping catheter 170 and the connecting tube 130, blood at the venous location is prevented from flowing into the connecting tube 130, and contamination of the balloon catheter 10 is prevented.
The first control valve 140 has various structural forms, as shown in fig. 4, and in a preferred embodiment, the first control valve 140 includes a first valve body 141, a first connecting shaft 142, a first sealing member 143, and a first elastic member 144, wherein:
the first valve body 141 is a cavity with two open ends, and the first valve body 141 is fixed in the second channel 132; in a specific arrangement, the first valve body 141 may be directly bonded inside the second passage 132 by an adhesive, and an end portion of the first valve body 141 is formed with an inward arc-shaped groove in order to facilitate the arrangement of the first seal 143.
The first connecting shaft 142 has a dumbbell-shaped structure with protrusions at two ends, the first connecting shaft 142 includes a first section 1421, a second section 1422 and a third section 1423, the first section 1421 is located in the first valve body 141, the third section 1423 is located outside the first valve body 141, and the second section 1422 can extend out of the first valve body 141; when the structure is specifically arranged, the first section 1421, the second section 1422, and the third section 1423 may be integrated, and are manufactured by processes such as injection molding and casting, and the first section 1421, the second section 1422, and the third section 1423 may be split structures, and are fixed into a whole by welding, adhesive bonding, snap-fit connection, threaded connection, and the like.
The first elastic member 144 is sleeved on the second section 1422, and the first elastic member 144 can abut against the first section 1421 and the inner wall of the first valve body 141; in a specific arrangement, the outer diameter of the first elastic member 144 is smaller than the inner diameter of the first valve body 141, and the first elastic member 144 may be a spring, or may be another structural member capable of achieving an elastic effect.
The first sealing element 143 is sleeved on the second section 1422, the first sealing element 143 is located outside the first valve body 141, and the first sealing element 143 can abut against the third section 1423 and the outer wall of the first valve body 141; in a specific arrangement, the first sealing element 143 may be a rubber ring, or may be another structural element capable of achieving a sealing effect.
In the balloon catheter 10, after entering the human body, inflation is started, gas first enters the first balloon 110, so that the first balloon 110 is inflated, pressure continues to be increased, the second balloon 120 is blocked, at this time, the pressure difference between the first balloon 110 and the second balloon 120 is increased, and when the pressure difference is increased to be greater than a set value, the pressure difference between the first balloon 110 and the second balloon 120 pushes the first connecting shaft 142 to move from the first balloon 110 toward the second balloon 120 in the second passage 132, the first elastic member 144 is compressed, the second section 1422 drives the third section 1423 and the first sealing member 143 to move toward the second balloon 120, so that the first sealing member 143 and the first valve body 141 are unsealed, the first control valve 140 is switched from closed to open, so that gas enters the second balloon 120 from the first balloon 110 through the second passage 132, the first valve body 141 and the second passage 132, and is blocked by freezing and ablating pulmonary veins. After the cryoablation is finished, the vacuum pump pumps the gas in the first and second balloons 110, 120 until the pressure difference between the second balloon 120 and the first balloon 110 is greater than a set value, the pressure difference between the second balloon 120 and the first balloon 110 pushes the first connecting shaft 142 to move from the second balloon 120 to the first balloon 110 in the second passage 132, the first elastic member 144 rebounds, the second section 1422 drives the third section 1423 and the first sealing member 143 to move towards the first balloon 110, so that the first sealing member 143 is in sealing connection with the first valve body 141, and the first control valve 140 is switched from opening to closing, thereby realizing the automatic opening and closing of the first control valve 140.
The second control valve 150 has various structural forms, and in a preferred embodiment, as shown in fig. 4, the second control valve 150 includes a second valve body 151, a second connecting shaft 152, a second sealing member 153, and a second elastic member 154, wherein:
the second valve body 151 is a cavity with both ends open, and the second valve body 151 is fixed in the first passage 131; in a specific arrangement, the second valve body 151 may be directly bonded inside the first passage 131 by an adhesive, and an end portion of the second valve body 151 is formed with an inward arc-shaped groove in order to facilitate the arrangement of the second seal 153.
The second connecting shaft 152 has a dumbbell-shaped structure with protrusions at two ends, the second connecting shaft 152 includes a fourth section 1521, a fifth section 1522 and a sixth section 1523, the fourth section 1521 is located in the second valve body 151, the sixth section 1523 is located outside the second valve body 151, and the fifth section 1522 can extend out of the second valve body 151; when the concrete setting, fourth section 1521, fifth section 1522 and sixth section 1523 can be formula structure as an organic whole, through technologies such as injection molding, casting preparation, fourth section 1521, fifth section 1522 and sixth section 1523 can be split type structure, and fixed as an organic whole through modes such as welding, binder bonding, buckle connection, threaded connection.
The second elastic element 154 is sleeved on the fifth section 1522, and the second elastic element 154 can abut against the fourth section 1521 and the inner wall of the second valve body 151; in a specific arrangement, the outer diameter of the second elastic member 154 is smaller than the inner diameter of the second valve body 151, and the second elastic member 154 may be a spring, or may be another structural member capable of achieving an elastic effect.
The second sealing element 153 is sleeved on the fifth section 1522, the second sealing element 153 is located outside the second valve body 151, and the second sealing element 153 can abut against the sixth section 1523 and the outer wall of the second valve body 151; in a specific arrangement, the second sealing element 153 may be a rubber ring, or may be another structural element capable of achieving a sealing effect.
In the balloon catheter 10, when the balloon catheter 10 is inflated after entering a human body, the gas firstly enters the first balloon 110, so that the first balloon 110 is inflated to increase the pressure, and at this time, when the pressure difference between the first balloon 110 and the second balloon 120 is increased to be greater than a set value, the sixth section 1523 presses the second sealing element 153 against the outer wall of the second valve body 151, and the second control valve 150 is in a closed state. After the cryoablation is finished, the vacuum pump pumps the gas in the first capsule 110 and the second capsule 120 until the pressure difference between the second capsule 120 and the first capsule 110 is greater than a set value, the first control valve 140 is switched from on to off, the vacuum pump continues to pump air, and when the pressure difference between the second capsule 120 and the first capsule 110 is greater than the set value, the pressure difference between the second capsule 120 and the first capsule 110, the second connecting shaft 152 moves in the first channel 131 from the second capsule 120 towards the first capsule 110, the second elastic member 154 is compressed, the fifth section 1522 drives the sixth section 1523 and the second sealing member 153 to move towards the first capsule 110, so that the sealing connection between the second sealing member 153 and the second valve 151 is released, and the second control valve 150 is switched from off to on, so that gas enters the first capsule 110 from the second capsule 120 through the first passage 131, the second valve body 151 and the first passage 131 until the gas in the second capsule 120 is exhausted, and when the pressure difference between the second capsule 120 and the first capsule 110 is smaller than a set value, the pressure difference between the first capsule 110 and the second capsule 120 pushes the second connecting shaft 152 to move in the second passage 132 from the first capsule 110 toward the second capsule 120, the second elastic member 154 rebounds, the fifth section 1522 drives the sixth section 1523 and the second sealing member 153 to move toward the second capsule 120, so that the second sealing member 153 is in sealing connection with the second valve body 151, and the second control valve 150 is switched from open to closed, thereby enabling automatic opening and closing of the second control valve 150.
All possible combinations of the technical features of the above embodiments may not be described for the sake of brevity, but should be considered as within the scope of the present disclosure as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. The utility model provides a balloon catheter which characterized in that, includes first utricule, second utricule, connecting pipe, first control valve and second control valve, wherein:
the connecting pipe is connected with the first balloon and the second balloon and is provided with a first channel and a second channel which are arranged at intervals and are respectively communicated with the first balloon and the second balloon;
the first control valve is arranged in the second channel and communicated with the second bag body in a one-way mode;
the second control valve is arranged in the first channel and communicated with the first bag body in a one-way mode;
when the inflatable plug is used and the pressure difference between the first bag body and the second bag body is larger than a set value, the first control valve is switched to be opened; and when the air is pumped and the pressure difference between the second capsule and the first capsule is greater than the set value, the second control valve is switched to be opened.
2. A balloon catheter according to claim 1, wherein said set value is 1kPa-6.5kPa.
3. A balloon catheter according to claim 1, wherein said first balloon is made of a non-compliant material.
4. A balloon catheter according to claim 3, wherein the material of the first balloon is PET or PA.
5. A balloon catheter according to claim 1, wherein said second balloon is made of a compliant material or a super compliant material.
6. A balloon catheter according to claim 5, wherein the material of the second balloon is one of PU, TPE, TPR.
7. A balloon catheter according to claim 1, further comprising an inner tube extending through the first balloon and communicating with the connecting tube, and a mapping catheter extending through the inner tube and into and out of the connecting tube.
8. A balloon catheter according to claim 7, wherein the connecting tube is provided with a through hole in a middle region thereof, and the mapping catheter extends through the through hole and is sealingly connected to the connecting tube.
9. The balloon catheter of claim 1, wherein the first control valve comprises a first valve body, a first connecting shaft, a first seal, and a first resilient member, wherein:
the first valve body is a cavity with openings at two ends and is fixed in the second channel;
the first connecting shaft is of a dumbbell-shaped structure with bulges at two ends and comprises a first section, a second section and a third section, the first section is positioned in the first valve body, the third section is positioned outside the first valve body, and the second section can extend out of the first valve body;
the first elastic piece is sleeved on the second section and can be abutted against the first section and the inner wall of the first valve body;
the first sealing element is sleeved on the second section and positioned outside the first valve body, and can be abutted against the third section and the outer wall of the first valve body.
10. The balloon catheter according to claim 1, wherein the second control valve includes a second valve body, a second connecting shaft, a second sealing member, and a second elastic member, wherein:
the second valve body is a cavity with openings at two ends and is fixed in the first channel;
the second connecting shaft is of a dumbbell-shaped structure with bulges at two ends and comprises a fourth section, a fifth section and a sixth section, the fourth section is positioned in the second valve body, the sixth section is positioned outside the second valve body, and the fifth section can extend out of the second valve body;
the second elastic piece is sleeved on the fifth section and can be abutted against the fourth section and the inner wall of the second valve body;
the second sealing element is sleeved on the fifth section and located outside the second valve body, and can be abutted against the sixth section and the outer wall of the second valve body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111368838.2A CN113926061B (en) | 2021-11-18 | 2021-11-18 | Balloon catheter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111368838.2A CN113926061B (en) | 2021-11-18 | 2021-11-18 | Balloon catheter |
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| CN113926061A CN113926061A (en) | 2022-01-14 |
| CN113926061B true CN113926061B (en) | 2023-04-07 |
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| CN116965909B (en) * | 2023-07-25 | 2024-04-30 | 苏州海宇新辰医疗科技有限公司 | Double-layer balloon catheter for cryoablation based on novel inflation mode |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8025661B2 (en) * | 1994-09-09 | 2011-09-27 | Cardiofocus, Inc. | Coaxial catheter instruments for ablation with radiant energy |
| GB2381457A (en) * | 2001-10-31 | 2003-05-07 | Leonidas Diamantopoulos | Dilatation catheter system |
| MXPA06007623A (en) * | 2003-12-31 | 2007-01-30 | Johnson & Johnson | Circumferential ablation device assembly with an expandable member. |
| CN109646093B (en) * | 2017-06-03 | 2021-05-25 | 成都五义医疗科技有限公司 | Hollow sleeve containing movable expanding air bag and sleeve assembly |
| AU2019338398A1 (en) * | 2018-09-11 | 2021-05-20 | Aqua Heart, Inc. | Heated vapor ablation systems and methods for treating cardiac conditions |
| CN109223169A (en) * | 2018-11-13 | 2019-01-18 | 上海安钛克医疗科技有限公司 | Pulmonary vein is electrically isolated balloon structure |
| CN213145482U (en) * | 2020-08-07 | 2021-05-07 | 大连忠进精密模具有限公司 | Medical springless check valve |
| CN111840763A (en) * | 2020-08-18 | 2020-10-30 | 上海微创医疗器械（集团）有限公司 | Liquid conveying device and treatment device |
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