A balloon puncture device with overpressure indication function

Abstract

This invention discloses a balloon puncture device with overpressure indication function, belonging to the field of minimally invasive surgical medical device technology. The puncture device includes a cannula, a limiting balloon, an indicating balloon, an air delivery channel, and a fixation assembly. The limiting balloon and the indicating balloon are connected via the air channel, and pressure is synchronously fed back. The indicating balloon has a concave wall and a colored adhesive strip. Under normal pressure, the concave wall remains concave, and the adhesive strip adheres; when the pressure exceeds the limit, the concave wall bulges in the opposite direction, the adhesive strip detaches, and an audible sound is emitted, achieving dual visual and audible overpressure indication. This invention allows for intuitive judgment of the inflation status without external monitoring equipment, effectively avoiding tissue damage from balloon overpressure, improving fixation stability, reducing surgical complications, and is simple, safe, and reliable to operate, suitable for various minimally invasive surgical scenarios such as laparoscopy.

Description

Technical Field

[0001] This invention relates to medical device technology, and more particularly to a trocar system for minimally invasive surgeries such as laparoscopy. Background Technology

[0002] In minimally invasive surgeries such as laparoscopy, the trocar, as a core medical device for establishing the surgical access, directly affects the safety, precision, and postoperative recovery of the patient. Currently, the commonly used trocar fixation methods in clinical practice are mainly divided into two categories: threaded fixation and balloon fixation. Among them, the threaded fixation method achieves fixation through the mechanical interlocking of the threaded structure on the outer wall of the cannula with human tissue. However, it has drawbacks such as fixation stability being greatly affected by tissue texture, easy mechanical damage to surrounding tissues, and difficulty in adjustment, which limits its application in complex position surgeries.

[0003] Balloon fixation technology has gradually become the mainstream fixation solution for minimally invasive surgical puncture devices due to its advantages such as uniform force distribution during fixation, less tissue damage, and adaptability to various surgical positions.

[0004] Existing balloon fixation puncture techniques, such as Figure 1-2 As shown, the positioning balloon 300, which is placed outside the cannula 100, enters the abdominal cavity 200 of the human body with the cannula 100 in an uninflated state. After being inflated, it fits against the inner wall of the abdominal cavity 200 to form a support, thereby constructing a stable surgical working channel.

[0005] When the positioning balloon is underinflated, the fixation force is insufficient, and the cannula is prone to displacement or shaking during the operation, which may lead to deviations in the operation of surgical instruments or even damage to intra-abdominal organs; when the balloon is overinflated, especially when the trocar is at a special angle (such as... Figure 3 When the balloon pressure cannot be released (as shown), it continues to compress the abdominal tissues, leading to local blood circulation disorders, causing tissue edema and ischemic damage. Postoperative complications such as abdominal pain and bloating are likely to occur, prolonging the patient's recovery period. Summary of the Invention

[0006] To achieve the above objectives, the present invention provides a balloon puncture device with overpressure indication function, comprising a puncture device body, a cannula, a limiting balloon, an indicating balloon, and an air delivery channel; both the limiting balloon and the indicating balloon are flexible sealing balloons, and the two are connected by the air delivery channel; the indicating balloon has a concave wall and a colored rubber strip, the concave wall is concave under normal pressure, and the concave wall bulges in the opposite direction when there is overpressure, causing the colored rubber strip to detach from the indicating balloon wall, thus achieving dual overpressure indication by sight and hearing.

[0007] Furthermore, the cannula is provided with an indicator balloon groove, a limiting balloon groove, and a tracheal groove; the indicator balloon is embedded in the indicator balloon groove, the limiting balloon is embedded in the limiting balloon groove, and the airbag air delivery channel is located in the tracheal groove.

[0008] Furthermore, it also includes an air inlet branch pipe and a one-way valve pipe; the air inlet branch pipe is located on the sleeve and connects to the pipe head on the air duct of the airbag; the one-way valve pipe is installed at the port of the air inlet branch pipe to realize one-way gas injection and sealed retention.

[0009] Furthermore, the indicating balloon includes an upper end, a wall, and a lower end; the colored adhesive strip is attached to the upper end of the indicating balloon wall, and after detachment, it is sleeved on the outside of the upper end of the indicating balloon without interfering with the surgical operation.

[0010] Furthermore, it also includes a retaining ring, which is fitted onto the cannula and located between the indicating balloon and the limiting balloon, and is used to compress human tissue to enhance the stability of the puncture device.

[0011] Furthermore, it also includes a blocking rod, an outer cover, a stopcock body, and a stopcock valve; the blocking rod is a rigid rod that is inserted into the cannula during puncture to guide the puncture direction; the outer cover is detachably threaded to the cannula, and a stopcock body and a stopcock valve are installed on the outer cover to form a surgical channel opening and closing control mechanism.

[0012] Furthermore, the airbag air channel is provided with an indicator airbag hole and a lower tube head; the indicator airbag hole is connected to the indicator balloon, and the lower tube head is connected to the limiting balloon, so as to realize synchronous inflation and synchronous pressure feedback.

[0013] Furthermore, the overpressure indicator does not require an external pressure monitoring device. By visually observing the state of the concave wall and whether it has detached from the colored rubber strip, it can be determined whether the limiting balloon is overpressured.

[0014] This invention connects the airways of the indicator balloon and the limiting balloon, allowing the internal pressure of the limiting balloon to be fed back to the indicator balloon in real time and synchronously. Medical staff can intuitively and quickly judge the working status of the balloon during inflation without the need for additional pressure monitoring instruments. The operation is simple and the judgment is accurate.

[0015] The indicator balloon uses a structure with a concave wall and a colored rubber strip. Under normal pressure, the concave wall remains concave and the rubber strip is stably attached. When the pressure exceeds the safe range, the concave wall automatically bulges in the opposite direction and the rubber strip is detached, while an audible sound is generated, forming a dual overpressure warning of both visual and auditory senses, effectively preventing overpressure of the limiting balloon due to excessive inflation.

[0016] The limiting balloon distributes force evenly and applies gentle pressure to human tissues, significantly reducing the risk of complications such as tissue edema and ischemic injury, thus improving surgical safety and patient recovery speed. The synergistic effect of the fixation ring and the limiting balloon further enhances the stability of the trocar within the body cavity, preventing cannula displacement and movement during surgery, ensuring precise instrument operation, and adapting to various complex surgical positions.

[0017] With a high degree of overall structural integration and simple assembly, the indicator components do not interfere with surgical operations and there is no risk of foreign body residue after detachment. It combines safety, practicality and reliability, and better meets the requirements of minimally invasive surgery for low-damage and high-stability use of instruments.

[0018] The following will further explain the concept, specific structure, and technical effects of the present invention in conjunction with the accompanying drawings, so as to fully understand the purpose, features, and effects of the present invention. Attached Figure Description

[0019] Figure 1 This is a diagram showing the state of the limiting balloon after the puncture device has penetrated human tissue in the prior art of this invention, before it has inflated.

[0020] Figure 2 yes Figure 1 Diagram showing the trocar at its normal angle after the balloon is inflated at the mid-limit position.

[0021] Figure 3 yes Figure 2 Diagram showing the balloon under overpressure when the puncture device is at a special angle.

[0022] Figure 4 This is a perspective view of the puncture device body according to a specific embodiment of the present invention.

[0023] Figure 5 yes Figure 4 Exploded view of the components of the puncture device body.

[0024] Figure 6 This is a cross-sectional view of the indicative balloon according to a specific embodiment of the present invention.

[0025] Figure 7 yes Figure 6 A front view of the indicator balloon after the middle rubber strip has detached. Detailed Implementation

[0026] The following description, with reference to the accompanying drawings, illustrates several preferred embodiments of the present invention to make its technical content clearer and easier to understand. The present invention can be embodied in many different forms, and the scope of protection of the present invention is not limited to the embodiments mentioned herein.

[0027] In the accompanying drawings, components with the same structure are indicated by the same numerical designation, and components with similar structures or functions are indicated by similar numerical designations. The dimensions and thicknesses of each component shown in the drawings are arbitrary, and the present invention does not limit the dimensions and thicknesses of each component. To make the illustrations clearer, the thickness of some components has been appropriately exaggerated in the drawings.

[0028] like Figure 4-5 As shown, the balloon puncture device with overpressure indicator of the present invention includes a blocking rod 1, an outer cover 2, an indicator balloon 3, a cannula 4, a limiting balloon 5, a fixing ring 6, an air duct channel 7, a stopcock body 8, a stopcock valve 9, and a one-way valve tube 10.

[0029] The outer cover 2 is detachably connected to the cannula 4 via threads. A stopcock body 8 and a stopcock valve 9 are fitted onto its surface, forming the on / off control mechanism for the surgical working channel. The blocking rod 1 is a rigid rod-shaped structure that is inserted into the cannula 4 during puncture to guide the puncture direction.

[0030] The sleeve 4 serves as the core supporting component of the device, and is provided with an air inlet branch pipe 41, a through hole 42, an indicator balloon groove 43, an airway groove 44, and a limiting balloon groove 45.

[0031] The indicator balloon 3 and the limiting balloon 5 are flexible sealing balloons, respectively embedded in corresponding slots of the sleeve 4, and are connected by an air passage 7 located in the airway slot 44. The upper tube head 71 of the air passage 7 is connected to the air inlet branch pipe 41 of the sleeve 4 through the through hole 42; the indicator balloon air hole 73 of the air passage 7 is connected to the indicator balloon 3; and the lower tube head 74 of the air passage 7 is connected to the limiting balloon 5. A one-way valve pipe 10 is installed at the port of the air inlet branch pipe 41 to realize one-way gas injection and retention control.

[0032] The fixation ring 6 is fitted onto the cannula 4 and positioned between the indicating balloon 3 and the limiting balloon 5. During the procedure, its position is adjusted to compress the human tissue between the fixation ring 6 and the limiting balloon 5, thereby enhancing the stability of the trocar fixation.

[0033] The indicator balloon 3 is used to indicate the balloon pressure of the limiting balloon 5. In such cases... Figure 6-7In the illustrated embodiment, the indicating balloon 3 includes an upper part 31, an indicating balloon wall 32, and a lower part 33. A colored adhesive strip 322 is attached to the indicating balloon wall 32 near the upper part 31, and a concave wall 321 is formed on the indicating balloon wall 32. When the balloon is inflated, the indicating balloon 3 and the limiting balloon 5 expand synchronously. Under normal inflation, the concave wall 321 is in a concave state. When the inflation is excessive, the concave wall 321 will bulge outward, popping the adhesive strip 322 away from the indicating balloon wall 32, causing the adhesive strip 322 to detach from the indicating balloon wall 32 and making a sound so that the user can detect that the balloon is over-inflated. At the same time, the detached adhesive strip 322 will only cover the outside of the upper part 31 of the indicating balloon and will not interfere with the surgery.

[0034] In laparoscopic minimally invasive surgery, medical staff first insert the blocking rod of the trocar into the cannula. Holding the outer cover and cannula assembly, they smoothly insert the deflated limiting balloon along with the cannula into the patient's abdominal cavity. Once the cannula is in place, gas is slowly injected into the balloon's air delivery channel through the one-way valve at the air inlet. The gas simultaneously enters the indicator balloon and the limiting balloon through the channel. The limiting balloon gradually inflates within the abdominal cavity and adheres to the abdominal wall, achieving initial fixation of the trocar. At this point, medical staff can observe the indicator balloon on the outside of the cannula; its concave wall remains naturally concave, indicating that the limiting balloon is at normal operating pressure, stably fixed, and will not compress the abdominal tissue. Subsequently, the position of the fixing ring on the cannula is adjusted so that the human tissue is compressed between the fixing ring and the limiting balloon, further enhancing the fixation effect of the trocar and preventing cannula displacement during the operation. If the rubber strip comes off during inflation and the concave wall bulges in the opposite direction, medical staff can immediately stop inflation and release some gas through the ventilation structure to ensure that the limiting balloon is always within the safe pressure range. No pressure monitoring equipment is needed throughout the process; overpressure can be judged and adjusted by visual observation alone, effectively preventing complications such as abdominal tissue edema and ischemic injury caused by balloon overpressure, and ensuring surgical safety and postoperative recovery for the patient.

[0035] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A balloon puncture device with overpressure indication function, characterized in that, The device includes a puncture instrument body, a cannula, a limiting balloon, an indicating balloon, and an air delivery channel. Both the limiting balloon and the indicating balloon are flexible, sealed balloons, and they are connected by the air delivery channel. The indicating balloon has a concave wall and a colored rubber strip. Under normal pressure, the concave wall is recessed, and under overpressure, the concave wall bulges in the opposite direction, causing the colored rubber strip to detach from the indicating balloon wall, thus achieving both visual and auditory overpressure indication.

2. The balloon puncture device with overpressure indication function according to claim 1, characterized in that, The cannula is provided with an indicator balloon groove, a limiting balloon groove and a tracheal groove; the indicator balloon is embedded in the indicator balloon groove, the limiting balloon is embedded in the limiting balloon groove, and the air duct channel of the balloon is located in the tracheal groove.

3. The balloon puncture device with overpressure indication function according to claim 1, characterized in that, It also includes the gas inlet branch pipe and the one-way valve pipe; The gas inlet branch pipe is located on the sleeve and connects to the pipe head on the airbag's air guide channel; the one-way valve pipe is installed at the port of the gas inlet branch pipe to realize one-way gas injection and sealed retention.

4. The balloon puncture device with overpressure indication function according to claim 1, characterized in that, The indicating balloon includes an upper end, a wall, and a lower end; the colored adhesive strip is attached to the upper end of the indicating balloon wall, and after detachment, it is sleeved on the outside of the upper end of the indicating balloon without interfering with the surgical procedure.

5. The balloon puncture device with overpressure indication function according to claim 1, characterized in that, It also includes a retaining ring, which is fitted onto the cannula and located between the indicating balloon and the limiting balloon, and is used to compress human tissue to enhance the stability of the puncture device.

6. The balloon puncture device with overpressure indication function according to claim 1, characterized in that, It also includes a blocking rod, an outer cover, a stopcock body, and a stopcock valve; the blocking rod is a rigid rod that is inserted into the cannula during puncture to guide the puncture direction; the outer cover is detachably connected to the cannula by threads, and the stopcock body and stopcock valve are installed on the outer cover to form a surgical channel opening and closing control mechanism.

7. The balloon puncture device with overpressure indication function according to claim 1, characterized in that, The airbag air channel is equipped with an indicator airbag hole and a lower tube head; the indicator airbag hole is connected to the indicator balloon, and the lower tube head is connected to the limiting balloon, so as to realize synchronous inflation and synchronous pressure feedback.

8. The balloon puncture device with overpressure indication function according to claim 1, characterized in that, The overpressure indicator does not require an external pressure monitoring device. You can determine whether the limiting balloon is overpressured by visually observing the state of the concave wall and whether it is detached from the colored rubber strip.

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