Temperature-controlled gastric tube

Abstract

The utility model relates to medical instrument technical field, specifically disclose a temperature control stomach tube, include: stomach tube main part and joint, the input end of stomach tube main part is butt joint with joint, the output end of stomach tube main part is equipped with nutrient solution output port, the stomach tube main part includes inner tube temperature control pipe, one end of temperature control pipe is close to the one end of inner tube towards joint and the outside communication, the other end of temperature control pipe is pasted in the inner tube periphery, and again returns the one end of inner tube towards joint and the outside communication. The utility model discloses that the temperature control pipe surrounds the inner tube design significantly prolongs heat exchange path, and can quickly respond esophageal temperature change in combination closed circulation medium system, effectively avoid the esophageal thermal damage temperature gradient control in radiofrequency ablation, through the adjustment medium flow rate or temperature, can realize the esophagus longitudinal temperature gradient management, avoid high temperature area excessive cooling or low temperature area heat residual, improve the temperature control security.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically a temperature-controlled gastric tube. Background Technology

[0002] In cardiac radiofrequency ablation, high-frequency current is applied to myocardial tissue through a catheter to eliminate abnormal electrical signals. However, this process may cause an increase in temperature in adjacent esophageal tissue due to energy transfer, leading to esophageal thermal damage (such as ulcers, strictures, or perforations). Traditional temperature control methods often rely on external monitoring or single-point temperature measurement, which suffers from response lag and inaccurate temperature control. To address these issues, this invention proposes a gastric tube with an integrated temperature control structure. By directly contacting the esophageal inner wall, it achieves real-time temperature monitoring and active regulation, improving the safety of radiofrequency ablation treatment. Utility Model Content

[0003] In order to overcome the problems existing in the prior art, the purpose of this utility model is to provide a temperature-controlled gastric tube.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a temperature-controlled gastric tube, including: a gastric tube body and a connector, wherein the input end of the gastric tube body is connected to the connector, and the output end of the gastric tube body is provided with a nutrient solution output port;

[0005] The gastric tube body includes an inner tube and a temperature control tube. One end of the temperature control tube is close to the end of the inner tube facing the connector and is connected to the outside. The other end of the temperature control tube is attached to the outer periphery of the inner tube and returns to the end of the inner tube facing the connector and is connected to the outside.

[0006] Main working principle: Both ends of the temperature control tube are located at the same end of the inner tube near the connector, forming a closed loop path. An external temperature control device is connected to both ends of the temperature control tube via a Luer connector, driving the temperature-controlled medium (such as coolant, gas, or saline) to circulate within the tube. The temperature control tube starts from the middle section and runs axially along the inner tube, eventually returning to the input end. The temperature control tube covers the entire esophagus along the inner tube's axis, achieving longitudinal temperature gradient control by adjusting the medium's flow rate or temperature. This design significantly increases the contact area with the inner tube by extending the medium's flow path, thus improving heat transfer efficiency.

[0007] When the esophageal temperature is too high, an external device injects a low-temperature medium into one end of the temperature control tube. The medium flows along a spiral path and exchanges heat with the inner tube through the tube wall. The heat is then conducted to the temperature control tube, and the medium returns to the equipment for cooling after heating up, forming a circulating cooling cycle.

[0008] After treatment, a constant temperature medium of 37°C can be injected into the temperature control tube to maintain the physiological temperature of the esophagus and avoid low temperature stimulation or local overheating.

[0009] This working principle combines fluid dynamics and thermodynamics to provide an innovative solution for esophageal thermal protection during cardiac radiofrequency ablation.

[0010] Preferably, the middle section of the temperature control tube is spirally wrapped around the surface of the inner tube along the length of the inner tube.

[0011] Preferably, the device also includes a temperature sensor, which is attached to the surface of the temperature control tube and is in contact with the temperature control tube.

[0012] Preferably, multiple sets of temperature sensors are provided, and the multiple sets of temperature sensors are arranged along the length direction of the inner tube.

[0013] Preferably, the inner tube is further provided with a conduit, one end of which is connected to the temperature sensor, and the other end of which passes through the inner tube and communicates with the outside. The wire of the temperature sensor extends to the outside through the conduit.

[0014] Preferably, the nutrient solution outlet is provided with multiple outlets, and the multiple sets of nutrient solution outlets are arranged along the length of the inner tube.

[0015] Preferably, the connector is a Luer connector.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention significantly extends the heat exchange path through the design of the temperature control tube surrounding the inner tube. Combined with a closed-loop medium system, it can quickly respond to changes in esophageal temperature, effectively avoiding esophageal thermal damage during radiofrequency ablation. By adjusting the medium flow rate or temperature, longitudinal temperature gradient management of the esophagus can be achieved, avoiding excessive cooling in high-temperature areas or residual heat in low-temperature areas, thus improving temperature control safety. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the entire temperature-controlled gastric tube;

[0020] Figure 2 This is a schematic diagram of the cross-section of the temperature-controlled gastric tube.

[0021] 1. Gastric tube body; 10. Inner tube; 12. Temperature control tube; 13. Cable; 2. Connector; 3. Nutrient solution outlet; 5. Temperature sensor. Detailed Implementation

[0022] To better understand the above-mentioned objectives, features, and advantages of this utility model, it will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. Many specific details are set forth in the following description to provide a thorough understanding of this utility model; the described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0024] Example 1

[0025] This embodiment discloses a temperature-controlled gastric tube, such as Figures 1-2 As shown, the device includes a gastric tube body 1 and a connector 2. Both ends of the temperature control tube 12 are located at the same end of the inner tube 10 near the connector 2, forming a closed-loop circulation path. An external temperature control device is connected to both ends of the temperature control tube 12 via a Luer connector 2, driving the temperature control medium (such as coolant, gas, or saline) to circulate within the tube. The temperature control tube 12 is positioned axially along the inner tube 10 from the middle section and eventually returns to the input end. The temperature control tube 12 covers the entire esophagus along the inner tube 10 axially, achieving longitudinal temperature gradient control by adjusting the medium flow rate or temperature. This design significantly increases the contact area with the inner tube 10 by extending the medium flow path, thereby improving heat transfer efficiency.

[0026] When the esophageal temperature is too high, an external device injects a low-temperature medium into one end of the temperature control tube 12. The medium flows along a spiral path and exchanges heat with the inner tube 10 through the tube wall. The heat is then conducted to the temperature control tube 12, and the medium returns to the equipment for cooling after heating up, forming a circulating cooling cycle.

[0027] After treatment, the temperature control tube 12 can be injected with a constant temperature medium of 37°C to maintain the physiological temperature of the esophagus and avoid low temperature stimulation or local overheating.

[0028] This working principle combines fluid dynamics and thermodynamics to provide an innovative solution for esophageal thermal protection during cardiac radiofrequency ablation.

[0029] In some optional embodiments, the middle section of the temperature control tube 12 is spirally wound around the surface of the inner tube 10 with a pitch of [specified pitch], covering 80% of the total length of the inner tube 10. This ensures a close fit with the inner tube 10. The spiral structure increases the contact area between the temperature control tube 12 and the inner tube 10, while simultaneously preventing increased bending resistance of the inner tube 10 due to excessive winding. When the medium flows, the spiral path prolongs the heat exchange time, achieving a uniform temperature gradient distribution through heat transfer.

[0030] In some optional embodiments, a thin-film thermistor temperature sensor 5 is used, which is attached to the outer wall of the temperature control tube 12 with thermally conductive adhesive. The sensor signal is transmitted to an external monitoring terminal via wires to display the esophageal temperature field distribution in real time. When the temperature at any monitoring point exceeds the set temperature, an alarm is triggered and the temperature control device is activated.

[0031] In some optional embodiments, multiple sets of temperature sensors 5 are arranged at equal intervals along the axial direction of the inner tube 10, covering the vulnerable areas of the esophagus. When a local temperature is abnormal, the system automatically adjusts the medium flow rate of the corresponding section of the temperature control tube 12 to achieve precise temperature control.

[0032] In some alternative embodiments, a conduit 13 is embedded within the wall of the inner tube 10, with the inlet of the conduit 13 located on the side wall of the Luer connector 2 and the outlet flush with the end of the temperature control tube 12. After the temperature sensor 5 wire is inserted into the conduit 13, it is fixed to the connector 2 with silicone sealant to ensure that the wire is not subjected to tensile or compressive stress when the gastric tube is bent.

[0033] In some optional embodiments, multiple sets of side holes are provided at the tip of the inner tube 10. This design improves the uniformity of nutrient solution distribution and avoids local high flow rates impacting the esophageal mucosa.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A temperature-controlled gastric tube, characterized in that, include: The gastric tube body and the connector, wherein the input end of the gastric tube body is connected to the connector, and the output end of the gastric tube body is provided with a nutrient solution outlet; The gastric tube body includes an inner tube and a temperature control tube. One end of the temperature control tube is close to the end of the inner tube facing the connector and is connected to the outside. The other end of the temperature control tube is attached to the outer periphery of the inner tube and returns to the end of the inner tube facing the connector and is connected to the outside.

2. The temperature-controlled gastric tube according to claim 1, characterized in that, The middle section of the temperature control tube spirals around the surface of the inner tube along its length.

3. The temperature-controlled gastric tube according to claim 1, characterized in that, It also includes a temperature sensor, which is attached to the surface of the temperature control tube and the temperature sensor is in contact with the temperature control tube.

4. The temperature-controlled gastric tube according to claim 3, characterized in that, The temperature sensor is provided in multiple sets, and the multiple sets of temperature sensors are arranged along the length of the inner tube.

5. The temperature-controlled gastric tube according to claim 3, characterized in that, The inner tube is also equipped with a conduit, one end of which is connected to the temperature sensor, and the other end of which passes through the inner tube and communicates with the outside. The wire of the temperature sensor extends to the outside through the conduit.

6. The temperature-controlled gastric tube according to claim 1, characterized in that, The nutrient solution outlet is provided with multiple outlets, and the multiple sets of nutrient solution outlets are arranged along the length of the inner tube.

7. The temperature-controlled gastric tube according to claim 1, characterized in that, The connector is a Luer connector.

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