A gastric tube for conveniently determining the insertion length

Abstract

The present invention discloses a gastric tube that is convenient for determining the insertion length, and relates to the technical field of gastric tubes. The present invention specifically 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, and the traction wire is used to drive the deformation part to deform in the radial direction of the gastric tube body, and the position of the deformation part is determined according to the deformation amount of the deformation part. The present invention sets a deformation part on the side wall of the gastric tube body, and judges whether the deformation part is in the stomach by the deformation amount of the deformation part, so as to achieve the effect of quickly determining the insertion depth of the gastric tube.

Description

Technical Field

[0001] The invention relates to the technical field of gastric tubes, and in particular provides a gastric tube whose insertion length can be conveniently determined. Background Art

[0002] When inserting a gastric tube clinically, the operator will first estimate the length of the inserted gastric tube, and then insert the gastric tube into the patient's esophagus. In order to ensure that the gastric tube is accurately inserted into the stomach rather than into the bronchus, it is necessary to confirm it after the gastric tube is inserted. The commonly used methods for determination in clinical practice are auscultation and aspiration of gastric juice. The auscultation method is to inject a small amount of air into the gastric tube with a syringe, and listen to the stomach with a stethoscope at the same time. If there is a sound of air passing through water, it indicates that the gastric tube is in the stomach; while aspiration of gastric juice is to use a syringe to extract gastric juice outward. If gastric juice can be extracted, it means that the end of the gastric tube has been inserted into the stomach.

[0003] However, the auscultation method is easily affected by the patient's body noise. When the patient has phlegm stuck in the body, the noise produced is similar to the sound of air passing through water, which will affect the accuracy of the auscultation method. Air needs to be repeatedly injected to improve the accuracy of the auscultation method, which is confirmed to be inefficient. The gastric juice suction method also requires reciprocating operation, because the gastric tube may have multiple bends after being inserted into the body. If the end of the gastric tube enters the stomach without being immersed in the gastric juice, the gastric juice cannot be extracted. It is necessary to continue the insertion action before extraction. In addition, the extracted gastric juice is easy to spill on the bed or the patient, which is very inconvenient to operate and has the problem of low efficiency. Summary of the invention

[0004] The present invention provides a stomach tube whose insertion length can be conveniently determined, and is used to solve the problem of low efficiency in the prior art for confirming whether the stomach tube is inserted into the stomach.

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

[0006] A gastric tube that is convenient for determining the insertion length comprises a gastric tube body, a deformation portion and a traction wire, wherein 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 portion is connected to the end of the traction wire inserted into the gastric tube body, the traction wire is used to drive the deformation portion to deform in the radial direction of the gastric tube body, and the position of the deformation portion is determined according to the deformation amount of the deformation portion.

[0007] In this solution, the reason why the stomach space is large is utilized, and whether the end structure of the traction wire can be expanded to both sides is used to judge whether the end of the gastric tube enters the stomach. The deformation part is deformed by the traction wire, and the deformation part is deformed in the radial direction. If the end of the gastric tube body enters the stomach, because the width of the stomach is greater than 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 2.5-3cm. 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 3.5cm, it can be judged that the deformation part is located in the stomach. Therefore, the present invention can judge whether the end of the gastric tube body enters the stomach according to the deformation amount of the deformation part. When inserting the gastric tube, it is expected that the gastric tube has been inserted into the patient's stomach, and the deformation part is deformed by the traction wire. Then, it can be judged whether the gastric tube is inserted into the stomach by 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, which is in a position that is difficult to observe, in order to solve the problem that the deformation amount of the deformation part is difficult to observe, a traction wire is pulled out along the axial direction of the gastric tube body to deform the deformation part. The pulled-out amount of the traction wire is positively correlated with the deformation amount of the deformation part, and the deformation amount of the deformation part is determined by the pulled-out amount of the traction wire.

[0009] In this solution, the deformation part is deformed by pulling the traction wire, and the deformation amount of the deformation part is related to the moving distance of 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, the traction wire is pulled out from the external end of the gastric tube body, and the deformation amount of the deformation part can be judged according to the pulled length of the traction wire, so as to achieve 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 from the nasal cavity, the gastric tube body itself is curved, so the traction wire inside the gastric tube body is also in a curved state. When pulling the traction wire, the curved traction wire may only be straightened from the curved state, resulting in that the movement amount of the traction wire cannot accurately reflect the deformation amount of the deformed 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 constraining 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, so the traction wire cannot bend and deform when it is pushed into the mounting hole, 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 deformed part, solving the problem of the traction wire bending inside the gastric tube body and causing the doctor to misjudge.

[0012] In order to solve the problem that the deformation direction of the deformation part is not fixed and the deformation amount of the deformation part cannot accurately reflect the position of the deformation part, the deformation part is a flat strip structure, and the deformation part fits the surface of the gastric tube body.

[0013] In this solution, when the flat strip structure is subjected to external forces, the direction of its deformation is fixed, and the deformable portion is fitted with the surface of the gastric tube body to ensure that the deformable portion can deform in the radial direction of the gastric tube body.

[0014] Preferably, the side of the deformation portion close to the insertion end of the gastric tube body is connected to the traction wire, and the side of the deformation portion away from the insertion end of the gastric tube body is connected to the gastric tube body, and the traction wire is pulled to deform the deformation portion.

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

[0016] In order to solve the problem that the traction wire is connected to the deformation part and thus is difficult to remove, the deformation part is made of a destructible material. When removing the traction wire, the traction wire is continuously pulled to damage the deformation part, thereby separating the traction wire from the deformation part.

[0017] In this solution, the deformation part is made of a destructible material, and the traction wire can be separated from the deformation part by destruction. No complicated structure is required, and no complicated operation is required to remove the traction wire.

[0018] It also includes a sleeve, the inner diameter of the sleeve is the same as the diameter of the traction wire, the mounting hole is the inner hole of the sleeve, one end of the sleeve is inserted into the gastric tube body, the side wall of the gastric tube body is provided with a strip hole, one end of the traction wire passes through the sleeve and then passes through the strip hole to connect with the deformation part.

[0019] In this solution, the problem that the traction wire does not correspond to the deformation amount of the deformation part due to bending is solved by a sleeve. The advantage is that it can be applied to the existing gastric tube body, and there is no need to separately produce a gastric tube with a mounting hole, so it 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 away 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 separately so that the traction wire moves relative to the sleeve.

[0022] The sleeve handle comprises a containing part and a fixing part, wherein the containing part is slidably connected to the fixing part, and the fixing part is fixedly connected to the sleeve. The containing part is provided with a containing cavity, and an absorbing material for absorbing gastric juice is provided in the containing cavity.

[0023] In this solution, when removing the cannula and the traction wire, since the traction wire is located inside the cannula, the cannula and the traction wire can be removed simultaneously by directly pulling out the cannula in the gastric tube body. When removing the cannula, the cannula will pass through the accommodating cavity, and the absorbing material in the accommodating cavity will absorb the gastric juice contaminated on the surface of the cannula to prevent the gastric juice from spilling.

[0024] The fixing part is a strip of elastic material, and two ends of the fixing part are connected to form an annular structure, and the sleeve and the traction wire can be rolled up on the outer side of the annular structure.

[0025] In this solution, the medical staff only needs to hold the receiving part with one hand and rotate the annular structure with the other hand to achieve the effect of rolling up the cannula, thereby taking out the cannula. In addition, the taken-out cannula is in a rolled-up state, which is convenient for storage and processing.

[0026] Beneficial effects of the present invention:

[0027] The present invention arranges a deformation part on the side wall of the stomach tube body, and judges whether the deformation part is in the stomach according to the deformation amount of the deformation part, so as to achieve the effect of quickly determining the insertion depth of the stomach tube. BRIEF 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 are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0030] Figure 2 It is a partial cross-sectional view of the deformed portion of the insertion end of the stomach tube of Example 1 after deformation;

[0031] Figure 3 It is a right side view of an implementation structure of the deformation part in the first embodiment;

[0032] Figure 4 It is a right side view of another implementation structure of the deformation part in the first embodiment;

[0033] Figure 5 It is a left side view of the insertion end of the stomach tube body in Example 1;

[0034] Figure 6 It is a partial cross-sectional view of the deformation part provided with a through hole and connected with the traction wire in the first embodiment;

[0035] Figure 7 It is a partial cross-sectional view of the deformation part provided with a countersunk hole and connected with the traction wire in the first embodiment;

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

[0037] Fig. 9 is a partial cross-sectional view of the deformed portion of the insertion end of the stomach tube in Example 2 after deformation;

[0038] Fig.10 is a partial cross-sectional view of the insertion end of the gastric tube in Example 3;

[0039] Fig.11 It is a partial schematic diagram of the first air balloon at the gastric tube insertion end in the fourth embodiment when it is not inflated and deformed;

[0040] Fig.12 It is a partial schematic diagram of the first air bag at the gastric tube insertion end after expansion and deformation in the fourth embodiment;

[0041] Fig.13 It is a partial schematic diagram of the operating end of the gastric tube in Example 5;

[0042] Fig.14 It is a partial cross-sectional view of the sleeve handle in the fifth embodiment from the main viewing angle;

[0043] Fig.15 It is a cross-sectional view of the sleeve handle in the fifth embodiment from the left side perspective;

[0044] Fig.16 This is a schematic diagram of the structure of the fixing portion of the sleeve handle in Example 6 after being bent into a ring structure.

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

[0046] 1. Gastric tube body; 2. Traction wire; 3. Deformation part; 4. Strip hole; 5. Connecting rod; 6. Strip sheet; 7. Groove; 8. Through hole; 9. Fixing block; 10. Countersunk hole; 11. Sleeve; 12. Deformation strip; 13. Through hole; 14. Mounting hole; 15. Accommodation part; 16. Fixing part; 17. Traction wire handle; 18. Reeling groove; 19. Suction material; 20. First air bag. DETAILED DESCRIPTION

[0047] In conjunction with the accompanying drawings, the technical solution of the present invention is clearly and completely described through specific implementation methods of the embodiments of the present invention.

[0048] Embodiment 1:

[0049] like Figure 1 and Figure 2As shown, the present embodiment 1 provides a stomach tube that is convenient for determining the insertion length, including a stomach tube body 1, a traction wire 2 and a deformation part 3, wherein one end of the traction wire 2 is inserted into the stomach tube body 1 from the external end of the stomach tube body 1, and the end of the traction wire 2 inserted into the stomach tube body 1 extends to the insertion end of the stomach tube body 1, and the deformation part 3 is arranged at the insertion end of the stomach tube body 1, and the traction wire 2 is connected to the deformation part 3. Pulling the traction wire 2 outward from the stomach tube body 1 can make the traction wire 2 move along the axial direction of the stomach tube body 1, and the movement of the traction wire 2 drives the deformation part 3 to deform. The greater the movement of the traction wire 2, the greater the deformation amount of the deformation part 3, so 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 constrained 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 space inside the esophagus, and the deformation amount of the deformation part 3 is large. Therefore, the deformation amount of the deformation part 3 can be judged according to the movable distance of the traction wire 2, and whether the deformation part 3 enters the stomach can be judged by 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, so whether the insertion end of the gastric tube body 1 enters the stomach can be judged by the movable amount of the traction wire 2.

[0050] The stomach tube body 1 may be provided with one, two or more flow channels. The flow channel refers to a hole connecting the two ends of the stomach tube body 1. The multiple flow channels may be provided for introducing instruments, extracting body fluids, inputting drugs or inputting food.

[0051] The diameter of the esophagus is usually 2.5-3cm, and the sum of the diameter of the gastric tube body 1 and the maximum radial deformation of the deformation part 3 relative to the gastric tube body 1 is greater than 3.5cm. When the traction wire 2 is pulled out to maximize the deformation of the deformation part 3, the radial deformation of the deformation part 3 relative to the gastric tube body 1 is also maximized, and when the deformation part 3 is in the stomach, the deformation of the deformation part 3 can reach the maximum. When the deformation part 3 is in the esophagus, the deformation part 3 will be against the inner wall of the esophagus when deformed, and the inner wall of the esophagus will block the deformation of the deformation part 3, resulting in the deformation part 3 being unable to reach the maximum deformation. Therefore, by observing the pulling distance of the traction wire 2, it can be judged whether the deformation of the deformation part 3 can reach the maximum deformation. When the deformation of the deformation part 3 reaches the maximum, it can be judged that the deformation part 3 is 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 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 parts of the strip piece 6 are easy to deform, while the rest of the strip piece 6 is difficult to deform due to its great thickness. This is used to prevent the rest of the strip piece 6 from deforming after the middle part of the strip piece 6 abuts against the inner wall of the esophagus, causing the traction wire to continue to be pulled, that is, to prevent the rest of the strip piece 6 from deforming and causing medical staff to misjudge the position of the deformed portion 3.

[0056] like Figure 5 As shown, since the traction wire 2 is located in the stomach tube body 1, but the traction wire 2 needs to pull the deformation part 3 located on the outer side wall of the stomach tube, the side wall of the stomach tube body 1 is provided with a strip hole 4, the length direction of the strip hole 4 is parallel to the axial direction of the stomach tube body 1, and the end of the traction wire 2 passes through the strip 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 hole 4, so that the deformation part 3 will not enter the stomach tube body 1 from the strip hole 4 after being acted upon by the traction wire 2.

[0057] The traction wire 2 can be made of stainless steel, nickel-titanium alloy or polymer. After the insertion end of the stomach tube body 1 is inserted into the stomach, the traction wire 2 in the stomach tube body 1 is extracted.

[0058] like Figure 6 As shown, when the traction wire 2 is pulled 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 pulled out. The deformation part 3 can be made of a destructible material. A fixed block 9 is provided at the end of the traction wire 2. The diameter of the fixed block 9 is larger 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. The diameter of the fixed block 9 is larger than the through hole 8. When the deformation part 3 is within the deformation range, the fixed block 9 cannot pass through the through hole 8. When the deformation amount of the deformation part 3 reaches the limit position, the traction wire 2 continues to be pulled, and the fixed block 9 increases the force applied to the deformation part 3 to damage and expand the through hole 8, and finally allows the fixed block 9 to pass. Similarly, the through hole 8 can also be elastically deformed to allow the fixed block 9 to pass.

[0059] Optional, such as Figure 7 As shown, in order to prevent the fixing block 9 from being located outside the stomach tube body 1 and contacting human tissue, the through hole 8 on the deformation portion 3 can be set as a countersunk hole 10, the inner diameter of the countersunk hole 10 is larger than the opening diameter, and the fixing block 9 is buried in the countersunk hole 10. When the deformation portion 3 is at the limit position of the deformation amount, the traction wire 2 is continuously pulled, the hole wall of the countersunk hole 10 is damaged or deformed, so that the fixing block 9 is separated from the countersunk hole 10, so that the traction wire 2 can be drawn out from the stomach tube body 1.

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

[0061] Embodiment 2:

[0062] The second embodiment provides a gastric tube that is convenient for determining the insertion length. The difference from the first embodiment is that the deformation portion 3 in the second embodiment is different.

[0063] like Figure 8 and Fig. 9 As shown, in the second embodiment, a sleeve 11 is also provided, and the inner diameter of the sleeve 11 is the same as or slightly larger than the diameter of the traction wire 2, and the inner hole of the sleeve 11 is equivalent to the mounting hole 14 for mounting the traction wire 2, so that the traction wire 2 can move axially relative to the sleeve 11. The 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 the side wall of the sleeve 11 is provided with two strip holes, so that the side wall of the sleeve 11 forms two deformation strips 12 that can be deformed in the radial direction. When the traction wire 2 is pulled to make the traction wire 2 move 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 squeezed and deformed in the radial direction.

[0064] The advantages of this arrangement are, firstly, when the traction wire 2 is pulled, the traction wire 2 cannot bend and deform in the sleeve 11, which can ensure that the distance the traction wire 2 is pulled is more accurately correlated with the deformation amount of the deformation part; secondly, 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, and the deformation distance of a single deformation strip 12 in the radial direction only needs to be greater than the radius of the esophagus, which can reduce the stroke of the traction wire 2 during detection and also reduce the length of the deformation part.

[0065] When inserting the gastric tube body 1, one end of the sleeve 11 is inserted 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 is inserted into the stomach, the sleeve 11 is pushed into the gastric tube body 1 for a certain distance, which is greater than the length of the deformation strip 12, so that the deformation strip 12 extends 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, thereby deforming the deformation strip 12. Observe the pulled-out length of the traction wire 2 to determine whether the position of the deformation strip 12 is in the stomach. If the deformation strip 12 is in the stomach, loosen the traction wire 2, and the deformation strip 12 restores its shape under the action of its own elastic force, and the traction wire 2 retreats back into the sleeve 11 when the deformation strip 12 restores its shape. Then push the stomach tube body 1 into the stomach for a certain distance, which is the same as the distance of the sleeve 11, to ensure that the insertion end of the stomach tube body 1 is located in the stomach, and then loosen the traction wire and remove the sleeve 11. Because the traction wire 2 is located in the sleeve 11, removing the sleeve 11 also removes the traction wire 2.

[0066] Similarly, the middle part of the deformation strip 12 is also provided with a groove 7 to reduce the thickness or width, thereby controlling the deformation position of the deformation strip 12 .

[0067] Embodiment three:

[0068] The third embodiment of the present invention provides a gastric tube whose insertion length is convenient to determine. Different from the first embodiment, the third embodiment of the present invention 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, and the inner hole of the sleeve 11 is equivalent to the mounting hole 14 for mounting the traction wire 2, so that the traction wire 2 can move axially relative to the sleeve 11.

[0069] Since the gastric tube body 1 is inserted from the patient's nasal cavity, the gastric tube body 1 is in a bent state after insertion. At this time, the traction wire 2 located in 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 be straightened. During this process, the traction wire 2 is straightened but the deformed part is not pulled, thereby causing the doctor to misjudge.

[0070] like Fig.12 As shown, in order to solve the above problems, the traction wire 2 in the third embodiment is connected to the deformation part located on the side wall of the gastric tube body 1 after passing through the sleeve 11, and the rest of the traction wire 2 will be located in the sleeve 11. The inner diameter of the sleeve 11 is the same as or slightly larger than that of the traction wire 2, so the traction wire 2 cannot be bent and deformed in the sleeve 11, and the length of the traction wire 2 in the sleeve 11 is always fixed. Therefore, when the traction wire 2 is pulled to move the traction wire 2 relative to the sleeve 11, the traction wire 2 will inevitably pull the deformation part 3 to deform, and the stroke of the traction wire 2 relative to the sleeve 11 corresponds more accurately to the deformation amount of the deformation part 3, thereby achieving the effect of avoiding misjudgment by doctors.

[0071] Embodiment 4:

[0072] The fourth embodiment provides a gastric tube whose insertion length can be easily determined. Different from the first embodiment, the traction wire 2 in the fourth embodiment is a hollow tube, and the deformation portion 3 is an inflatable first airbag 20.

[0073] like Fig.10 and Fig.11 As shown, the bottom end of the first airbag 20 is connected to the outer wall of the gastric tube body 1, the traction wire 2 is connected to the top end of the first airbag 20, and the traction wire 2 is communicated with the first airbag 20. When the gastric tube body 1 is inserted, the deformed portion is in a contracted state. After the gastric tube body 1 is inserted, air is injected into the traction wire 2 through a syringe, and 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 connected to the second airbag. The pressure required 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 is inflated and rests against the esophagus, 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 begin to expand. 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 constrained by the esophagus when it is expanded, so the second airbag will not expand.

[0075] Therefore, by observing whether the second air balloon becomes larger, it can be determined whether the first air balloon 20 has entered the stomach, thereby determining whether the gastric tube body has entered 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 inevitably expand and become larger.

[0077] It should be noted that the expansion deformation described in the fourth embodiment refers to the expansion of the volume of a balloon after being inflated.

[0078] When the traction wire 2 needs to be removed, the first airbag 20 can also be removed at the same time. Optionally, a fixing block 9 corresponding to the end of the traction wire 2 in the first embodiment is provided at the bottom end of the first airbag 20, and a countersunk hole 10 corresponding to the first embodiment for matching with the fixing block 9 is provided on the outer side wall of the gastric tube body 1. Therefore, when the traction wire is pulled out, the force of the first airbag 20 is transmitted to the fixing block 9, and the force of the fixing block 9 causes the countersunk hole 10 to expand and deform, thereby causing the fixing block 9 to detach from the countersunk hole 10, and the principle is the same as that of the first embodiment.

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

[0080] The first airbag 20 can be in a shape similar to a strip balloon. When the first airbag 20 is not inflated, the top of the first airbag 20 is located in the through hole. This is equivalent to connecting both ends of the first airbag 20 to the gastric tube body 1, so as 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 provided in the first airbag 20, and the two ends of the limiting wire are respectively connected to the two ends of the first airbag 20, and the length of the limiting wire is fixed and cannot be elastically deformed. After the first airbag 20 is expanded, the two 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 the second embodiment, the fifth embodiment provides a gastric tube that is convenient for determining the insertion length. Different from the second embodiment, the third embodiment is further provided with a handle, and the handle includes a sleeve handle for pulling the sleeve 11 and a traction wire handle 17 for pulling the traction wire 2.

[0084] like Fig.13 As shown, the sleeve handle is connected to the sleeve 11, and 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 sleeve 11. When the traction wire 2 and the sleeve 11 need to be removed, the sleeve handle can be directly grasped to remove the sleeve 11 from the gastric tube body 1. When the sleeve 11 is taken out, the traction wire 2 is also taken out along with the sleeve 11.

[0085] like Fig.14 and Fig.15 As shown, the sleeve handle includes a receiving portion 15 and a fixing portion 16, wherein 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 sleeve 11. The receiving portion 15 is provided with a receiving cavity, and a absorbing material 19 is provided in the receiving cavity. The absorbing material 19 is used to absorb gastric juice contaminated by the sleeve 11. The sleeve 11 passes through the receiving cavity, and the absorbing material abuts against the side of the sleeve 11 from the circumferential direction, so as to absorb gastric juice and prevent gastric juice from spilling.

[0086] The absorbent material 19 can be a sponge.

[0087] The traction wire handle 17 can be cylindrical, prismatic, spherical, ellipsoidal or other shapes or special shapes. The traction wire 2 is connected to one end of the traction wire handle 17, and its function is to facilitate the grasping and pulling of the traction wire 2.

[0088] The fixing portion 16 of the sleeve handle can be cylindrical or prismatic, and the end of the sleeve 11 passes through the receiving portion 15 and is connected to the side of the fixing portion 16, which facilitates the grasping and pulling of the sleeve 11. The receiving portion 15 is annular in shape, and the receiving portion 15 is sleeved on the fixing portion 16, and the absorbing material is arranged inside.

[0089] Embodiment six:

[0090] Based on the fifth embodiment, the sixth embodiment provides a gastric tube that is convenient for determining the insertion length. The difference from the fifth embodiment is that the fixing portion 16 in the sixth embodiment can be bent to form an annular structure, and the accommodating portion 15 can rotate on the annular structure around the axis of the annular structure.

[0091] like Fig.16 As shown, the fixing portion 16 is made of elastic material, and an annular structure is formed when the fixing portion 16 is bent and connected at both ends. By holding the accommodating portion 15 and rotating the annular structure, the sleeve 11 can be rolled up on the outer side of the annular structure, and finally the sleeve 11 and the traction wire 2 can be taken out. In this process, the operator always holds the accommodating portion 15 and the annular structure, and does not need to pull the sleeve 11 and the traction wire 2. The accommodating portion 15 and the annular structure are larger than the sleeve 11 and the traction wire 2 and are easier to hold. When the medical staff takes out the sleeve 11 and the traction wire 2, they will not slip, which is convenient for the medical staff to take out the sleeve 11 and the traction wire 2. In addition, the taken out sleeve 11 and the traction wire 2 are in a rolled-up state, which is convenient for the medical staff to store and handle, and will not scatter and 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 groove bottom of the winding groove 18, for example, by gluing. The winding groove 18 can prevent the wound sleeve 11 from affecting the rotation of the accommodating portion 15 around the annular structure.

[0093] The two ends of the fixing part 16 are connected. A socket can be set at one end of the fixing part 16, and an insertion shaft can be set 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 socket, so that the two ends of the fixing part 16 can be relatively fixed. The friction between the insertion shaft and the socket prevents the insertion shaft from being separated from the socket, so that the fixing part 16 can stably form a ring structure.

Claims

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

8. A gastric tube for conveniently determining the insertion length according to claim 7, 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).

9. A gastric tube for conveniently determining the insertion length according to claim 8, 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.

10. A gastric tube for conveniently determining the insertion length according to claim 9, 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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