A gastric tube that facilitates determination of the insertion length

Abstract

The present invention discloses a gastric tube that facilitates determination of the insertion length, and relates to the technical field of gastric tubes. Specifically, the present invention includes a gastric tube body, a deformation part, and a traction wire. The gastric tube body is provided with at least one flow channel. One end of the traction wire is inserted into a flow channel of the gastric tube body. The deformation part is connected to the end of the traction wire inserted into the gastric tube body. The traction wire is used to drive the deformation part to generate deformation in the radial direction of the gastric tube body, and the position of the deformation part is determined according to the amount of deformation of the deformation part. The present invention provides a deformation part on the side wall of the gastric tube body, and judges whether the deformation part is in the stomach by the amount of deformation of the deformation part, achieving the effect of quickly determining the insertion depth of the gastric tube.

Description

Technical Field

[0001] The present invention relates to the technical field of gastric tubes, and specifically provides a gastric tube that facilitates the determination of the insertion length. Background Art

[0002] When clinically inserting a gastric tube, the operator will first estimate the length of the inserted gastric tube and then insert the gastric tube into the patient's esophagus. To determine that the gastric tube is accurately inserted into the stomach rather than into the bronchus, it is necessary to confirm after the gastric tube is inserted. Commonly used determination methods in clinical practice include auscultation and aspiration of gastric juice. Auscultation is to inject a small amount of air into the gastric tube with a syringe while listening to the stomach with a stethoscope. If there is a gurgling sound, it indicates that the gastric tube is in the stomach; while aspiration of gastric juice is to use a syringe to aspirate gastric juice outward. If gastric juice can be aspirated, it means that the end of the gastric tube has been inserted into the stomach.

[0003] However, auscultation is easily interfered by the internal noises of the patient. When the noise generated by expectoration in the patient's body is similar to the gurgling sound, it will affect the accuracy of auscultation. It is necessary to repeatedly inject air to improve the accuracy of auscultation, and the confirmation efficiency is low. The method of aspirating gastric juice also requires reciprocating operations. Because there may be multiple bends in the gastric tube after it is inserted into the body, if the end of the gastric tube enters the stomach but does not dip into the gastric juice, gastric juice cannot be aspirated, and it is necessary to continue the insertion action and then aspirate. Moreover, the aspirated gastric juice is likely to spill onto the hospital bed or the patient, the operation is very inconvenient, and there is also a problem of low efficiency. Summary of the Invention

[0004] The present invention provides a gastric tube that facilitates the determination of the insertion length, which is used to solve the problem of low efficiency in the confirmation method of whether the gastric tube is inserted into the stomach in the prior art.

[0005] The technical solution of the present invention is as follows:

[0006] A gastric tube that facilitates the determination of the insertion length, comprising a gastric tube body, a deformation part and a traction wire. The gastric tube body is provided with at least one flow channel. One end of the traction wire is inserted into a flow channel of the gastric tube body. The deformation part is connected to the end of the traction wire inserted into the gastric tube body. The traction wire is used to drive the deformation part to generate deformation in the radial direction of the gastric tube body, and the position of the deformation part is determined according to the amount of deformation of the deformation part.

[0007] In this solution, due to the large space in the stomach, it is determined whether the end of the gastric tube has entered the stomach by whether the end structure of the traction wire can expand to both sides. The deformation part is deformed by the traction wire, and the deformation part deforms in the radial direction. If the end of the gastric tube body enters the stomach, since the width in the stomach is greater than that of the esophagus, the deformable amount of the deformation part is large. On the contrary, if the end of the gastric tube body does not enter the stomach, the deformation amount of the deformation part is small. The diameter of the esophagus of ordinary people is 2.5 - 3 cm. Therefore, when the sum of the radial deformation amount of the deformation part and the diameter of the gastric tube exceeds a certain value, for example, exceeds 3.5 cm, it can be determined that the deformation part is in the stomach. Therefore, the present invention can determine whether the end of the gastric tube body has entered the stomach according to the deformation amount of the deformation part. When inserting the gastric tube, after it is expected that the gastric tube has been inserted into the patient's stomach, the deformation part is deformed by the traction wire, and then it can be determined whether the gastric tube has been inserted into the stomach through the deformation amount of the deformation part. The operation is simple and efficient.

[0008] Since the deformation part is located at the insertion end of the gastric tube body and is in a difficult-to-observe position, to solve the problem that the deformation amount of the deformation part is difficult to observe, for this reason, the traction wire is pulled out along the axis direction of the gastric tube body to deform the deformation part. The amount of the traction wire pulled out is positively correlated with the deformation amount of the deformation part, and the deformation amount of the deformation part is determined by the amount of the traction wire pulled out.

[0009] In this solution, the deformation part is deformed by pulling the traction wire. The deformation amount of the deformation part is related to the moving distance of pulling the traction wire. The greater the moving distance of the traction wire, the greater the deformation amount of the deformation part. Therefore, in this solution, by pulling out the traction wire from the outer end of the gastric tube body, the deformation amount of the deformation part can be judged according to the pulling-out length of the traction wire, achieving the effect of observing the deformation amount of the deformation part through the traction wire from outside the body.

[0010] Because the gastric tube body is usually inserted through the nasal cavity and the gastric tube body itself is curved, the traction wire in the gastric tube body is also in a curved state. When pulling the traction wire, it may only straighten the curved traction wire from the curved state, resulting in that the moving amount of the traction wire cannot accurately reflect the deformation amount of the deformation part, and there is a large error in the deformation amount of the traction wire. For this reason, the gastric tube body is provided with a mounting hole for restricting the traction wire. The diameter of the mounting hole is the same as the diameter of the traction wire, and the traction wire can be slidably inserted into the mounting hole.

[0011] In this solution, the traction wire is located in the mounting hole, and the diameter of the mounting hole is the same as the diameter of the traction wire. Therefore, when the traction wire is pushed into the mounting hole, the traction wire cannot be bent and deformed, and the length of the traction wire in the mounting hole is stable and unchanged, so that the moving distance of the traction wire accurately corresponds to the deformation amount of the deformation part, solving the problem that the doctor misjudges due to the bending of the traction wire in the gastric tube body.

[0012] To solve the problem that the deformation direction of the deformation part is not fixed, resulting in the deformation amount of the deformation part not being able to accurately reflect the position of the deformation part, therefore, the deformation part has a flat strip structure, and the deformation part is attached to the surface of the gastric tube body.

[0013] In this solution, when the flat strip structure is subjected to an external force, its deformation direction is fixed. And the deformation part being attached to the surface of the gastric tube body can ensure that the deformation part can deform in the radial direction of the gastric tube body.

[0014] Preferably, one side of the deformation part close to the insertion end of the gastric tube body is connected to the traction wire, and the other side of the deformation part far from the insertion end of the gastric tube body is connected to the gastric tube body, and the traction wire is pulled to cause the deformation part to deform.

[0015] In this solution, by pulling the traction wire to deform the deformation part, the problem that the deformation amount of the deformation part is inaccurate caused by the bending of the traction wire can be solved.

[0016] To solve the problem that the traction wire is not easy to be taken out due to its connection with the deformation part, therefore, the deformation part is made of a breakable material. When taking out the traction wire, the traction wire is continuously pulled to break the deformation part, so that the traction wire is separated from the deformation part.

[0017] In this solution, the deformation part is made of a breakable material. By the way of breaking, the traction wire can be separated from the deformation part, without the need for a complex structure, and the operation of taking out the traction wire is also not complicated.

[0018] It also includes a sleeve. The inner diameter of the sleeve is the same as the diameter of the traction wire. The installation hole is the inner hole of the sleeve. One end of the sleeve penetrates into the gastric tube body, and a strip hole is provided on the side wall of the gastric tube body. One end of the traction wire passes through the sleeve and then passes through the strip hole to be connected to the deformation part.

[0019] In this solution, the problem that the traction wire is not corresponding to the deformation amount of the deformation part due to bending is solved by the sleeve. The advantage is that it can be applied to the existing gastric tube body, without the need to separately produce a gastric tube with an installation hole, and can be quickly promoted.

[0020] Preferably, a sleeve handle and a traction wire handle are provided at one end of the sleeve and the traction wire far from the insertion end of the gastric tube body.

[0021] In this solution, the sleeve handle and the traction wire handle are respectively provided to facilitate pulling the traction wire respectively, so that the traction wire moves relative to the sleeve.

[0022] The sleeve handle includes a receiving part and a fixing part. The receiving part is slidably connected to the fixing part. The fixing part is fixedly connected to the sleeve. The receiving part is provided with a receiving cavity, and a suction material for adsorbing gastric juice is arranged in the receiving cavity.

[0023] In this solution, when removing the cannula and the traction wire, since the traction wire is located inside the cannula, directly pulling out the cannula inside the gastric tube body can simultaneously remove the cannula and the traction wire. When removing the cannula, the cannula will pass through the accommodation cavity, and the suction material in the accommodation cavity will suck the gastric juice contaminated on the surface of the cannula, preventing the gastric juice from spilling.

[0024] The fixing part is a strip-shaped elastic material, and both ends of the fixing part are connected to form a ring structure. The cannula and the traction wire can be wound around the outer side surface of the ring structure.

[0025] In this solution, medical staff only need to hold the accommodation part with one hand and rotate the ring structure with the other hand to achieve the effect of winding the cannula, thereby removing the cannula. Moreover, the removed cannula is in a wound state, which is convenient for storage and handling.

[0026] Advantages of the present invention:

[0027] The present invention provides a deformation part on the side wall of the gastric tube body, and determines whether the deformation part is in the stomach by the amount of deformation of the deformation part, achieving the effect of quickly determining the insertion depth of the gastric tube. Description of the drawings

[0028] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a partial cross-sectional view of the insertion end of the gastric tube in Embodiment 1;

[0030] Figure 2 It is a partial cross-sectional view of the deformation part of the insertion end of the gastric tube in Embodiment 1 after deformation;

[0031] Figure 3 It is a right view of an implementation structure of the deformation part in Embodiment 1;

[0032] Figure 4 It is a right view of another implementation structure of the deformation part in Embodiment 1;

[0033] Figure 5 It is a left view of the insertion end of the gastric tube body in Embodiment 1;

[0034] Figure 6 It is a partial cross-sectional view of the deformation part in Embodiment 1 with a through hole connected to the traction wire;

[0035] Figure 7 It is a partial cross-sectional view of the deformation part in Embodiment 1 with a counterbore connected to the traction wire;

[0036] Figure 8 Partial cross-sectional view of the insertion end of the gastric tube in Example 2;

[0037] Figure 9 Partial cross-sectional view of the deformed part of the insertion end of the gastric tube in Example 2 after deformation;

[0038] Figure 10 Partial cross-sectional view of the insertion end of the gastric tube in Example 3;

[0039] Figure 11 Partial schematic view of the non-inflated and deformed first airbag at the insertion end of the gastric tube in Example 4;

[0040] Figure 12 Partial schematic view of the inflated and deformed first airbag at the insertion end of the gastric tube in Example 4;

[0041] Figure 13 Partial schematic view of the operation end of the gastric tube in Example 5;

[0042] Figure 14 Partial cross-sectional view of the sleeve handle in the front view perspective in Example 5;

[0043] Figure 15 Cross-sectional view of the sleeve handle in the left view perspective in Example 5;

[0044] Figure 16 Schematic view of the structure of the fixed part of the sleeve handle in Example 6 after being bent into an annular structure.

[0045] In the above drawings, the corresponding reference numerals are shown as follows:

[0046] 1. Gastric tube body; 2. Traction wire; 3. Deformable part; 4. Strip-shaped hole; 5. Connecting rod; 6. Strip-shaped piece; 7. Groove; 8. Through hole; 9. Fixed block; 10. Counterbore; 11. Sleeve; 12. Deformable strip; 13. Through hole; 14. Mounting hole; 15. Accommodating part; 16. Fixed part; 17. Traction wire handle; 18. Reel groove; 19. Absorbing material; 20. First airbag. Detailed implementation manners

[0047] Combined with the drawings, the technical solutions of the present invention are clearly and completely described through the specific implementation manners of the embodiments of the present invention.

[0048] Example 1:

[0049] As Figure 1 And Figure 2As shown in the figure, Embodiment 1 of the present invention provides a gastric tube that facilitates the determination of the insertion length, which includes a gastric tube body 1, a traction wire 2, and a deformation part 3. One end of the traction wire 2 is inserted into the gastric tube body 1 from the external end of the gastric tube body 1, and the end of the traction wire 2 inserted into the gastric tube body 1 extends to the insertion end of the gastric tube body 1. The deformation part 3 is arranged at the insertion end of the gastric tube body 1, and the traction wire 2 is connected to the deformation part 3. Pulling the traction wire 2 out of the gastric tube body 1 can make the traction wire 2 move along the axial direction of the gastric tube body 1, and the movement of the traction wire 2 drives the deformation part 3 to deform. The greater the movement amount of the traction wire 2, the greater the deformation amount of the deformation part 3. Therefore, the deformable amount of the deformation part 3 can be judged according to the movable distance of the traction wire 2. When the deformation part 3 is located inside the esophagus, the deformation amount of the deformation part 3 is restricted by the esophagus, and the deformation amount of the deformation part 3 is small. When the deformation part 3 is located in the stomach, the internal space of the stomach is much larger than the internal space of the esophagus, and the deformation amount of the deformation part 3 is large. Therefore, the deformation amount of the deformation part 3 is judged according to the movable distance of the traction wire 2, and whether the deformation part 3 enters the stomach can be judged through the deformation amount of the deformation part 3. The deformation part 3 is located at the end of the insertion end of the gastric tube body 1. Therefore, the insertion end of the gastric tube body 1 can be judged whether it enters the stomach through the movable amount of the traction wire 2.

[0050] One, two or more flow channels can be provided in the gastric tube body 1. The flow channel refers to a pore channel that communicates the two ends of the gastric tube body 1. Providing multiple flow channels can be used to introduce instruments, extract body fluids, input drugs or input food.

[0051] The diameter of the esophagus is usually 2.5 - 3 cm. The sum of the diameter of the gastric tube body 1 and the maximum radial deformation amount of the deformation part 3 relative to the gastric tube body 1 is greater than 3.5 cm. When the traction wire 2 is pulled out to make the deformation amount of the deformation part 3 the largest, the radial deformation amount of the deformation part 3 relative to the gastric tube body 1 is also the largest. When the deformation part 3 is in the stomach, the deformation amount of the deformation part 3 can reach the maximum. When the deformation part 3 is located in the esophagus, when the deformation part 3 deforms, it will abut against the inner wall of the esophagus, and the inner wall of the esophagus will block the deformation of the deformation part 3, resulting in the deformation part 3 not being able to reach the maximum deformation amount. Therefore, by observing the pulling-out distance of the traction wire 2, it can be judged whether the deformation amount of the deformation part 3 can reach the maximum deformation amount. When the deformation amount of the deformation part 3 reaches the maximum, it can be judged that the deformation part 3 is located in the stomach, that is, the insertion end of the gastric tube body 1 has been inserted into the stomach; on the contrary, if the deformation amount of the deformation part 3 cannot reach the maximum, it means that the deformation part 3 is still in the esophagus and the gastric tube body 1 needs to be inserted further.

[0052] It should be noted that the deformation of the deformation portion 3 may be that the deformation portion 3 is provided with a deformable structure so that the deformation portion 3 is deformed under the traction of the traction wire 2; or the deformation portion 3 itself is elastically deformable, and the deformation portion 3 is elastically deformed under the traction of the traction wire 2. When the gastric tube body 1 is inserted, the deformation portion 3 is in a state of being attached to the outer wall of the gastric tube body 1.

[0053] For example, Figure 3 As shown, the deformation part 3 includes two connecting rods 5, and the ends of the two connecting rods 5 are flexibly connected to form a deformation part, one end of the deformation part is hinged to the gastric tube body 1, and the other end of the deformation part is hinged to the traction wire 2. The flexible connection of the two connecting rods 5 can be a hinged connection, or the two flexible rods are connected by a connecting line. The purpose of the flexible connection is to allow the two connecting rods 5 to swing relative to each other, and when the traction wire 2 is pulled to move, the two connecting rods 5 can be swung. In the initial position, the two connecting rods 5 are distributed along the axis direction of the gastric tube body 1, and the two connecting rods 5 are parallel to the axis of the gastric tube body 1. Moving the traction wire 2 can make the two connecting rods 5 tilted against each other, and the connection of the two connecting rods 5 will move toward the radial direction of the gastric tube body 1. When the moving distance of the traction wire 2 is larger, the angle between the two connecting rods 5 is smaller, and the distance between the connection of the two connecting rods 5 and the axis of the gastric tube body 1 is larger. When the connection of the two connecting rods 5 is against the esophagus, the angle between the two connecting rods 5 cannot be further reduced. When both connecting rods 5 enter the stomach, the angle between the two connecting rods 5 can be reduced to 0, that is, the two connecting rods 5 are in an overlapping state.

[0054] For example, Figure 4 As shown, the deformation portion 3 is a strip sheet 6 made of elastic material, and a groove 7 is provided in the middle of the strip sheet 6. The groove 7 makes the thickness of the middle of the strip sheet 6 thinner, so that the middle of the strip sheet 6 forms a weak point, so that the middle of the strip sheet 6 is more easily deformed when the strip sheet 6 is deformed by force. The thickness of the two ends of the strip sheet 6 is the same as the thickness of the groove 7 part, so that the connection between the strip sheet 6 and the gastric tube body 1 forms a weak point, so that the strip sheet 6 can be more easily deformed relative to the gastric tube body 1. The thin part of the strip sheet 6 is more easily deformed when it is stressed. Therefore, when the traction wire 2 moves, the two ends of the strip sheet 6 are close to each other, the middle of the strip sheet 6 will bend and arch, and the distance between the middle of the strip sheet 6 and the axis of the gastric tube body 1 will increase. When the arched part of the middle of the strip sheet 6 abuts against the esophagus, the middle of the strip sheet 6 cannot continue to arch, and when the strip sheet 6 is located in the stomach, the two ends of the strip sheet 6 can abut together, so that the strip sheet 6 is folded in half.

[0055] It should be noted that the weak part of the strip 6 is prone to deformation, while the other positions of the strip 6 are difficult to deform due to their large thickness, which is used to prevent the rest of the strip 6 from deforming after the middle part of the strip 6 abuts against the inner wall of the esophagus and causing the traction wire to continue to be pulled, that is, to prevent the rest of the strip 6 from deforming and causing medical staff to misjudge the position of the deformation part 3.

[0056] As Figure 5 shown, since the traction wire 2 is located inside the gastric tube body 1, but the traction wire 2 needs to pull the deformation part 3 located on the outer side wall of the gastric tube, a strip-shaped hole 4 is provided on the side wall of the gastric tube body 1. The length direction of the strip-shaped hole 4 is parallel to the axis direction of the gastric tube body 1. The end of the traction wire 2 passes through the strip-shaped hole 4 and is connected to the deformation part 3. The width of the deformation part 3 is greater than the width of the strip-shaped hole 4, so that the deformation part 3 will not enter the gastric tube body 1 from the strip-shaped hole 4 after being acted on by the traction wire 2.

[0057] The traction wire 2 can be made of stainless steel, nitinol alloy or polymer. After the insertion end of the gastric tube body 1 is inserted into the stomach, the traction wire 2 inside the gastric tube body 1 is then drawn out.

[0058] As Figure 6 shown, when the traction wire 2 is drawn out, the traction wire 2 needs to be separated from the deformation part 3. After the traction wire 2 is separated from the deformation part 3, the traction wire 2 can be drawn out. The deformation part 3 can be made of a destructible material. A fixing block 9 is provided at the end of the traction wire 2. The diameter of the fixing block 9 is greater than the diameter of the traction wire 2. A through hole 8 is provided on the deformation part 3. The diameter of the traction wire 2 is smaller than the through hole 8, and the diameter of the fixing block 9 is greater than the through hole 8. When the deformation part 3 is within the deformation range, the fixing block 9 cannot pass through the through hole 8. When the deformation amount of the deformation part 3 reaches the limit position, by continuing to pull the traction wire 2, the acting force of the fixing block 9 on the deformation part 3 increases, causing the through hole 8 to be damaged and enlarged, and finally the fixing block 9 passes through. Similarly, the through hole 8 can also undergo elastic deformation to allow the fixing block 9 to pass through.

[0059] Optionally, as Figure 7 shown, in order to prevent the fixing block 9 from contacting human tissues outside the gastric tube body 1, the through hole 8 on the deformation part 3 can be set as a counterbore 10. The inner diameter of the counterbore 10 is greater than the opening diameter, and the fixing block 9 is buried in the counterbore 10. When the deformation part 3 reaches the limit position of the deformation amount, by continuing to pull the traction wire 2, the hole wall of the counterbore 10 is damaged or deformed, so that the fixing block 9 is detached from the counterbore 10, allowing the traction wire 2 to be drawn out from the gastric tube body 1.

[0060] The deformation part 3 can be made of silicone material. The shape of the fixing block 9 can be spherical, rectangular, square or conical.

[0061] Embodiment 2:

[0062] Embodiment 2 provides a gastric tube that facilitates the determination of the insertion length. Different from Embodiment 1, the deformation part 3 in this Embodiment 2 is different.

[0063] As Figure 8 and Figure 9 shown, in this Embodiment 2, a sleeve 11 is also provided. The inner diameter of the sleeve 11 is the same as or slightly larger than the diameter of the traction wire 2. The inner hole of the sleeve 11 is equivalent to the installation hole 14 for installing the traction wire 2, so that the traction wire 2 can axially move relative to the sleeve 11. One end of the sleeve 11 close to the insertion end of the gastric tube body 1 is fixedly connected to the traction wire 2, and two strip holes are provided on the side wall of this end of the sleeve 11, so that two deformation strips 12 that can deform radially are formed on the side wall of the sleeve 11. When the traction wire 2 is pulled and the traction wire 2 moves radially relative to the sleeve 11, the traction wire 2 will pull the end of the sleeve 11 to move, and the side wall of the sleeve 11 is extruded and deformed in the radial direction.

[0064] The advantages of this setting method are as follows. First, when the traction wire 2 is pulled, the traction wire 2 cannot bend and deform within the sleeve 11, which can ensure that the distance of pulling the traction wire 2 is more accurately associated with the deformation amount of the deformation part. Second, the deformation part 3 can be taken out together with the traction wire 2 and will not remain in the patient's body. Finally, when the traction wire 2 is pulled to deform the deformation part, the two deformation strips 12 will deform in opposite directions at the same time. As long as the deformation distance of a single deformation strip 12 in the radial direction is greater than the radius of the esophagus, the stroke of the traction wire 2 during detection can be reduced, and the length of the deformation part can also be reduced.

[0065] When inserting the gastric tube body 1, insert one end of the sleeve 11 into the gastric tube body 1, and the end of the sleeve 11 is flush with the insertion end of the gastric tube body 1. Then insert the gastric tube body 1. After the medical staff estimates that the end of the gastric tube body 1 has been inserted into the stomach, the sleeve 11 is pushed into the gastric tube body 1 by a certain distance, and this distance is greater than the length of the deformation strip 12, so that the deformation strip 12 extends out from the end of the gastric tube body 1. Then pull the traction wire 2 to displace the traction wire 2 relative to the sleeve 11, so as to deform the deformation strip 12. Observe the pulled-out length of the traction wire 2 to judge whether the position of the deformation strip 12 is in the stomach. If the deformation strip 12 is in the stomach, release the traction wire 2, and the deformation strip 12 will return to its original shape under its own elastic force, and the traction wire 2 will retract into the sleeve 11 when the deformation strip 12 returns to its original shape. Then push the gastric tube body 1 into the stomach by a certain distance, and the pushed distance is the same as the pushed distance of the sleeve 11, ensuring that the insertion end of the gastric tube body 1 is in the stomach, and then release the traction wire and take out the sleeve 11. Because the traction wire 2 is located in the sleeve 11, taking out the sleeve 11 also takes out the traction wire 2.

[0066] Similarly, the middle part of the deformation strip 12 also reduces the thickness or width by setting the groove 7, so as to control the deformation position of the deformation strip 12.

[0067] Embodiment 3:

[0068] This Embodiment 3 provides a gastric tube that facilitates determining the insertion length. Different from Embodiment 1, this Embodiment 3 is further provided with a sleeve 11. The inner diameter of the sleeve 11 is the same as or slightly larger than the diameter of the traction wire 2. The inner hole of the sleeve 11 is equivalent to the mounting hole 14 for mounting the traction wire 2, enabling the traction wire 2 to axially move relative to the sleeve 11.

[0069] Since the gastric tube body 1 is inserted through the patient's nasal cavity and the gastric tube body 1 is in a bent state after insertion. At this time, the traction wire 2 located inside the gastric tube body 1 is also in a bent state. At this time, pulling the traction wire 2 will cause the traction wire 2 to have a process of being straightened. During this process, the traction wire 2 is straightened but does not pull the deformation part, thus causing misjudgment by the doctor.

[0070] As Figure 12 shown, to solve the above problems, in this Embodiment 3, the traction wire 2 passes through the sleeve 11 and is connected to the deformation part on the side wall of the gastric tube body 1. The rest of the traction wire 2 is located inside the sleeve 11. The inner diameter of the sleeve 11 is the same as or slightly larger than that of the traction wire 2. Therefore, the traction wire 2 cannot bend and deform inside the sleeve 11, and the length of the traction wire 2 inside the sleeve 11 is always fixed. Therefore, pulling the traction wire 2 to move the traction wire 2 relative to the sleeve 11 will inevitably cause the deformation part 3 to deform. The stroke of the traction wire 2 relative to the sleeve 11 corresponds more accurately to the deformation amount of the deformation part 3, achieving the effect of avoiding misjudgment by the doctor.

[0071] Embodiment 4:

[0072] This Embodiment 4 provides a gastric tube that facilitates determining the insertion length. Different from Embodiment 1, in this Embodiment 4, the traction wire 2 is a hollow tube, and the deformation part 3 is an inflatable first airbag 20.

[0073] As Figure 10 and Figure 11 shown, the bottom end of the first airbag 20 is connected to the outer side wall of the gastric tube body 1, the traction wire 2 is connected to the top end of the first airbag 20, and moreover, the traction wire 2 is in communication with the first airbag 20. When the gastric tube body 1 is inserted, the deformation part is in a contracted state. After the gastric tube body 1 is inserted, air is injected into the traction wire 2 through a syringe. The injected air enters the first airbag 20 through the traction wire 2, and the first airbag 20 expands.

[0074] A second airbag is also connected to the end of the traction wire outside the body, and the traction wire is in communication with the second airbag. Among them, the pressure requirement for the second airbag to expand and deform is greater than the pressure required for the first airbag 20 to expand and deform. Therefore, when the syringe injects air, the first airbag 20 will expand and deform first. If the first airbag 20 abuts against the esophagus after expansion, then the first airbag 20 cannot continue to expand. At this time, the continuous injection of the syringe will cause the air pressure to continue to rise, causing the second airbag to start expanding. If the first airbag 20 enters the stomach, after all the air in the syringe is injected, the space in the stomach is larger, and the first airbag 20 will not be restricted by the esophagus when expanding, so the second airbag will not expand and become larger.

[0075] Therefore, by observing whether the second airbag becomes larger, it can be determined whether the first airbag 20 enters the stomach, thereby determining whether the gastric tube body enters the stomach.

[0076] The volume of the syringe corresponds to the size of the first airbag 20. After all the gas in the syringe is injected, if the first airbag 20 is located in the esophagus, the second airbag will surely expand and become larger.

[0077] It should be noted that the expansion and deformation described in the fourth embodiment herein refers to the volume expansion and enlargement such as when a balloon is inflated.

[0078] When it is necessary to remove the traction wire 2, the first airbag 20 can also be removed at the same time. Optionally, a fixing block 9 is provided at the bottom end of the first airbag 20 corresponding to the end of the traction wire 2 in the first embodiment, and a counterbore 10 for adapting to the fixing block 9 is provided on the outer side wall of the gastric tube body 1 in the first embodiment. Therefore, when the traction wire is pulled out, the force on the first airbag 20 will be transmitted to the fixing block 9, and the acting force of the fixing block 9 causes the counterbore 10 to expand and deform, so that the fixing block 9 disengages from the counterbore 10, and the principle is the same as that of the first embodiment.

[0079] A through hole for the first airbag 20 to pass through is provided on the side wall of the gastric tube body 1, so that the first airbag can enter the gastric tube body 1 under the traction of the traction wire 2, and then move with the traction wire 2 in the gastric tube body 1 until it is taken out of the body.

[0080] The first airbag 20 can adopt a shape similar to a strip-shaped balloon. When the first airbag 20 is not inflated, the top end of the first airbag 20 is located in the through hole. It is equivalent to that both ends of the first airbag 20 are connected to the gastric tube body 1 to prevent the first airbag 20 from expanding and deforming in the axial direction of the gastric tube body 1.

[0081] Optionally, in order to prevent the first airbag 20 from expanding and deforming in the axial direction of the gastric tube body 1, a limiting wire can be arranged inside the first airbag 20. Both ends of the limiting wire are respectively connected to both ends of the first airbag 20. The length of the limiting wire is fixed and cannot be elastically deformed. After the first airbag 20 expands, both ends of the first airbag 20 are affected by the limiting wire and can only expand in the radial direction of the gastric tube body.

[0082] Embodiment Five:

[0083] Based on Embodiment Two, this Embodiment Five provides a gastric tube that facilitates determining the insertion length. Different from Embodiment Two, this Embodiment Three is further provided with a handle, and the handle includes a cannula handle for pulling the cannula 11 and a traction wire handle 17 for pulling the traction wire 2.

[0084] As Figure 13 shown, the cannula handle is connected to the cannula 11, while the traction wire handle 17 is connected to the traction wire 2. The traction wire handle 17 is used to pull the traction wire 2 to move relative to the cannula 11. When it is necessary to remove the traction wire 2 and the cannula 11, the cannula handle can be directly held to take out the cannula 11 from the gastric tube body 1. When the cannula 11 is taken out, the traction wire 2 is also taken out following the cannula 11.

[0085] As Figure 14 and Figure 15 shown, the cannula handle includes a receiving portion 15 and a fixing portion 16. Among them, the receiving portion 15 is slidably connected to the fixing portion 16, and the sliding direction of the receiving portion 15 is parallel to the axis of the cannula 11. The receiving portion 15 is provided with a receiving cavity, and a suction material 19 is arranged in the receiving cavity. The suction material 19 is used to suck the gastric juice contaminated by the cannula 11. The cannula 11 passes through the receiving cavity, and the suction material abuts against the side surface of the cannula 11 from the circumferential direction, achieving the effect of sucking the gastric juice and preventing the gastric juice from spilling.

[0086] The suction material 19 can be made of sponge.

[0087] The traction wire handle 17 can be in the shape of a cylinder, a prism, a sphere, an ellipsoid, or other shapes or irregular shapes. The traction wire 2 is connected to one end of the traction wire handle 17, and its function is to facilitate grasping and pulling the traction wire 2.

[0088] The shape of the fixing portion 16 of the cannula handle can be a cylinder or a prism. The end of the cannula 11 passes through the receiving portion 15 and is connected to the side surface of the fixing portion 16, and its function is to facilitate grasping and pulling the cannula 11. The shape of the receiving portion 15 is annular, the receiving portion 15 is sleeved on the fixing portion 16, and the suction material is arranged inside.

[0089] Embodiment Six:

[0090] Embodiment Six provides a gastric tube that facilitates determining the insertion length on the basis of Embodiment Five. Different from Embodiment Five, the fixing part 16 in Embodiment Six can be bent to form an annular structure, and the accommodating part 15 can rotate around the axis of the annular structure on the annular structure.

[0091] As Figure 16 shown, the fixing part 16 is made of an elastic material and forms an annular structure when the head and tail of the fixing part 16 are bent and connected. Holding the accommodating part 15 and rotating the annular structure can wind the sleeve 11 on the outer side of the annular structure, ultimately achieving the effect of removing the sleeve 11 and the traction wire 2. In this process, the operator always holds the accommodating part 15 and the annular structure, without the need to pull the sleeve 11 and the traction wire 2. The accommodating part 15 and the annular structure are larger in size than the sleeve 11 and the traction wire 2 and are more convenient to hold, so that the medical staff will not slip when removing the sleeve 11 and the traction wire 2, facilitating the medical staff to remove the sleeve 11 and the traction wire 2. Moreover, the removed sleeve 11 and traction wire 2 are in a wound state, which is convenient for the medical staff to store and handle, and will not scatter to affect the placement of other instruments.

[0092] A winding groove 18 is provided on the outer side of the annular structure, and the end of the sleeve 11 is connected to the bottom of the winding groove 18, for example, by glue bonding. The winding groove 18 can prevent the wound sleeve 11 from affecting the rotation of the accommodating part 15 around the annular structure.

[0093] Both ends of the fixing part 16 are connected. An insertion hole can be provided at one end of the fixing part 16, and an insertion shaft can be provided at the other end. When the two ends of the fixing part 16 are butted after being bent, the insertion shaft is inserted into the insertion hole, so that the two ends of the fixing part 16 can be relatively fixed. The friction between the insertion shaft and the insertion hole is used to prevent the insertion shaft from disengaging from the insertion hole, enabling the fixing part 16 to stably form an annular structure.

Claims

1. A gastric tube that is convenient for determining the insertion length, characterized in that: The invention comprises a stomach tube body (1), a deformation part (3) and a traction wire (2), wherein the stomach tube body (1) is provided with at least one flow channel, one end of the traction wire (2) is inserted into one flow channel of the stomach tube body (1), the deformation part (3) is connected to the end of the traction wire (2) inserted into the stomach tube body (1), the traction wire (2) is used to drive the deformation part (3) to deform in the radial direction of the stomach tube body (1), and the position of the deformation part (3) is determined according to the deformation amount of the deformation part (3), and also comprises a sleeve (11), the inner diameter of the sleeve (11) is the same as the diameter of the traction wire (2), the mounting hole (14) is the inner hole of the sleeve (11), one end of the sleeve (11) is inserted into the stomach tube body (1), the side wall of the stomach tube body (1) is provided with a strip hole (4), and one end of the traction wire (2) passes through the sleeve (11) and then passes through the strip hole (4) to be connected with the deformation part (3).

2. A gastric tube for conveniently determining the insertion length according to claim 1, characterized in that: The traction wire (2) is pulled out along the axial direction of the gastric tube body (1) to deform the deformation portion (3). The pulling amount of the traction wire (2) is positively correlated with the deformation amount of the deformation portion (3). The deformation amount of the deformation portion (3) is determined by the pulling amount of the traction wire (2).

3. A gastric tube for conveniently determining the insertion length according to claim 2, characterized in that: The stomach tube body (1) is provided with a mounting hole (14) for constraining the traction wire (2); the diameter of the mounting hole (14) is the same as the diameter of the traction wire (2); the traction wire (2) can be slidably inserted into the mounting hole (14).

4. A gastric tube for conveniently determining the insertion length according to claim 2, characterized in that: The deformable portion (3) is a flat strip-shaped structure, and the deformable portion (3) is in contact with the surface of the gastric tube body (1).

5. A gastric tube for conveniently determining the insertion length according to claim 2, characterized in that: The side of the deformation part (3) close to the insertion end of the gastric tube body (1) is connected to the traction wire (2), and the side of the deformation part (3) away from the insertion end of the gastric tube body (1) is connected to the gastric tube body (1). The traction wire (2) is pulled to deform the deformation part (3).

6. A gastric tube for conveniently determining the insertion length according to claim 1, characterized in that: The deformation portion (3) is made of a destructible material, and when the traction wire (2) is taken out, the traction wire (2) is continuously pulled to break the deformation portion (3), thereby separating the traction wire (2) from the deformation portion (3).

7. A gastric tube for conveniently determining the insertion length according to claim 1, characterized in that: The ends of the sleeve (11) and the traction wire (2) away from the insertion end of the stomach tube body (1) are provided with a sleeve handle and a traction wire handle (17).

8. A gastric tube for conveniently determining the insertion length according to claim 7, characterized in that: The sleeve handle comprises a receiving portion (15) and a fixing portion (16), wherein the receiving portion (15) and the fixing portion (16) are slidably connected, and the fixing portion (16) is fixedly connected to the sleeve (11), and the receiving portion (15) is provided with a receiving cavity, and an absorption material (19) for absorbing gastric juice is provided in the receiving cavity.

9. A gastric tube for conveniently determining the insertion length according to claim 8, characterized in that: The fixing part (16) is a strip of elastic material, and the two ends of the fixing part (16) are connected to form an annular structure, and the sleeve (11) and the traction wire (2) are rolled up on the outer side of the annular structure.

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