Double-layer stomach tube

Abstract

The double-layer stomach tube comprises an inner tube, an outer tube and an inner tube connector, the inner tube comprises an inner tube body and an inner tube end fixedly connected to the rear end of the inner tube body, and the inner tube connector is detachably connected with the inner tube end in a sealed mode; the outer pipe is sleeved outside the inner pipe, the outer diameter of the inner pipe body and the inner pipe end is smaller than the inner diameter of the outer pipe, the front section of the inner pipe body extends out of the front end of the outer pipe, and a plurality of side holes are formed in the front section of the inner pipe body; when the stomach tube is blocked and the like, the inner tube is pulled out along the outer tube to be dredged, cleaned and disinfected and then is inserted along the outer tube again or a new inner tube is inserted along the outer tube, and when the outer tube needs to be replaced, the extension tube is connected with the inner tube, then the outer tube is pulled out along the inner tube and the extension tube, and a new outer tube is inserted along the inner tube and the extension tube. Therefore, the success rate of multiple intubation is improved; when the inner tube is inserted and pulled out, due to the isolation effect of the outer tube, the inner tube cannot make contact with the esophagus and other parts of a patient, and discomfort caused to the patient can be eliminated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a stomach tube technical field, concretely relates to a double-layer stomach tube. BACKGROUND

[0002] A stomach tube is a kind of medical catheter inserted through nostril or oral cavity, reaches stomach through throat and esophagus, and is placed in stomach at one end and led out through nasal cavity or oral cavity at the other end. Its use is used to extract stomach contents such as gastric juice, gastrointestinal gas or blood clots in digestive tract bleeding, and on the other hand, medicine, nutrient solution or food can be injected through the stomach tube.

[0003] The success rate of inserting a stomach tube is closely related to the technical level and experience of medical staff and the cooperation of patients. When the stomach tube used by the patient is blocked, it needs to be replaced immediately. At the same time, due to long-term indwelling, the corrosion and stimulation of gastric acid can cause the stomach tube to age and break, affecting its function, and further affecting the patient's nutrient intake and recovery. Therefore, the stomach tube also needs to be replaced regularly. However, when the existing single tube structure stomach tube is replaced, the old tube must be completely pulled out and a new tube must be inserted. This process not only increases the pain of the patient, but also may cause damage to the esophagus and gastric mucosa due to improper operation or lack of cooperation from the patient, resulting in symptoms such as bleeding and pain. It is more likely to misinsert the trachea, causing aspiration pneumonia, which seriously threatens the life and health of the patient. Therefore, a new double-layer stomach tube that is easy to replace and simple to use is needed to solve the above problems. SUMMARY

[0004] The utility model aims at solving the problems in the background art, and provides a new double-layer stomach tube that is convenient to replace, reduces the discomfort such as bleeding and pain caused by inserting a stomach tube, and improves the success rate of intubation.

[0005] The utility model adopts the following technical scheme: a double-layer stomach tube, including inner tube, outer tube and inner tube joint, the inner tube includes inner tube tube body and the inner tube end that is fixedly connected to the rear end of inner tube tube body, the inner tube joint is detachably and sealingly connected with the inner tube end;

[0006] The outer tube is sleeved on the outside of the inner tube, the outer diameter of the inner tube tube body and the inner tube end is smaller than the inner diameter of the outer tube, the front section of the inner tube tube body extends out of the front end of the outer tube, a plurality of side holes are formed in the front section of the inner tube tube body extending out of the outer tube, and the inner tube can slide along the axis of the outer tube.

[0007] Further, the double-layer stomach tube further includes an extension tube, the extension tube includes an extension tube tube body and an extension tube end fixedly connected to the front end of the extension tube tube body, a first thread is arranged on the inner wall surface of the inner tube end, a fifth thread is arranged on the outer wall surface of the extension tube end, the first thread is threadedly connected with the fifth thread, and detachable connection between the inner tube end and the extension tube end is realized;

[0008] The outer diameter of the extension tube body and the extension tube end is smaller than the inner diameter of the outer tube, and the length of the extension tube body is greater than or equal to the length of the outer tube, and the outer tube can slide along the inner tube and the extension tube axis.

[0009] Further, the inner tube joint comprises a tapered tube, a connecting tube, a sealing cap and a connecting band, the tapered tube is a hollow conical structure with a closed front end face and an open rear end face, the connecting tube is fixedly connected to the front end face of the tapered tube and communicates with the inner cavity of the tapered tube, and the sealing cap is connected to the rear end of the tapered tube through the connecting band, and the sealing cap is used to close the rear end face of the tapered tube.

[0010] The inner wall surface of the inner tube end is provided with a first thread, the outer wall surface of the connecting tube is provided with a second thread, the first thread is threadedly connected with the second thread, and the detachable connection of the inner tube end and the connecting tube is realized.

[0011] Further, the outer tube comprises an outer tube body and an outer tube end fixedly connected to the front end of the outer tube body.

[0012] Further, the double-layer gastric tube further comprises a connecting structure for detachably connecting the inner tube joint and the outer tube, the connecting structure comprises a connecting sleeve and a connecting plate, the connecting sleeve is a hollow cylindrical structure with an open rear end face and a sleeve hole formed in the front end face, the connecting sleeve is sleeved on the outside of the outer tube body, and the open rear end face of the connecting sleeve faces the outer tube end, and the diameter of the sleeve hole is smaller than the outer diameter of the outer tube end and greater than the outer diameter of the outer tube body.

[0013] A third thread is arranged on the inner wall surface of the connecting sleeve, the connecting plate is fixedly installed on the inner tube joint, a fourth thread is arranged on the outer wall surface of the connecting plate, the third thread is threadedly connected with the fourth thread, and the detachable connection of the connecting sleeve and the connecting plate is realized.

[0014] Further, the connecting structure further comprises a limiting plate fixedly arranged on the outside of the outer tube body, the front end face of the connecting sleeve is between the outer tube end and the limiting plate, and the diameter of the sleeve hole is smaller than the outer diameter of the limiting plate.

[0015] Further, a sealing ring is arranged on the front end face of the tapered tube.

[0016] Further, the front end of the inner tube body is a round head structure, and the front end face of the outer tube is a circular ring structure, and the inner and outer edges of the circular ring structure are arc-shaped transitions.

[0017] Further, the outer wall of the inner tube body and the outer tube is marked with scale lines and corresponding scale values indicating the length.

[0018] The double-layer stomach tube in the utility model is of a sleeve joint type double-layer tube structure of an outer tube and an inner tube, when inserting the stomach tube, the outer tube is inserted into the stomach of the patient from the nose or the oral cavity by a conventional stomach tube insertion method, then the inner tube is inserted along the outer tube into the stomach, thereby completing the intubation, the inner tube joint is connected with the inner tube, and the gastric contents can be extracted through the inner tube or the medicine, the nutrient solution and the food can be injected through the inner tube;

[0019] When the stomach tube is blocked, etc., the inner tube is only pulled out along the outer tube, and after dredging, cleaning and disinfection, the inner tube is inserted along the outer tube again or a new inner tube is inserted along the outer tube; since the outer tube is used as the intubation channel of the inner tube, the replacement time of the outer tube can be prolonged, when the outer tube needs to be replaced, the outer tube is pulled out along the inner tube and the extension tube after the extension tube is connected with the inner tube, and a new outer tube is inserted along the inner tube and the extension tube; when the inner tube is inserted and pulled out, due to the isolation effect of the outer tube, the inner tube does not directly contact the esophagus and other parts of the patient, the discomfort of the patient caused by the intubation of the inner tube can be eliminated, and when the inner tube and the outer tube are replaced, one is used as the intubation channel of the other, thereby improving the success rate of multiple intubations. BRIEF DESCRIPTION OF DRAWINGS

[0020] ATTACHED Figure 1 It is the overall structure schematic view of the double-layer stomach tube in the utility model embodiment 1.

[0021] ATTACHED Figure 2 It is the structure schematic view of the inner tube 1 in the utility model.

[0022] ATTACHED Figure 3 It is the structure schematic view of the outer tube 2 in the utility model embodiment 1.

[0023] ATTACHED Figure 4 It is the structure schematic view of the inner tube joint 3 in the utility model embodiment 1.

[0024] ATTACHED Figure 5 It is the overall structure schematic view of the double-layer stomach tube in the utility model embodiment 2.

[0025] ATTACHED Figure 6 It is the structure schematic view of the outer tube 2 in the utility model embodiment 2.

[0026] ATTACHED Figure 7 It is the rear end partial section view structure schematic view of the outer tube 2 in the utility model embodiment 2.

[0027] ATTACHED Figure 8 It is the structure schematic view of the inner tube joint 3 in the utility model embodiment 2.

[0028] ATTACHED Figure 9 It is the structure schematic view of the extension tube 4 in the utility model.

[0029] The reference signs are explained as follows: inner tube 1, inner tube tube body 11, side hole 111, inner tube end head 12, first thread 121, outer tube 2, outer tube tube body 21, outer tube end head 22, connecting sleeve 23, third thread 231, sleeve joint hole 232, limiting plate 24, inner tube joint 3, tapered tube 31, connecting tube 32, second thread 321, closing cap 33, connecting belt 34, connecting plate 35, fourth thread 351, extension tube 4, extension tube tube body 41, extension tube end head 42, fifth thread 421. DETAILED DESCRIPTION

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiment or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor. The invention will be further described below in combination with the drawings:

[0031] Embodiment 1

[0032] Referring to the drawings accompanying the specification Figure 1 , 9 A double-layer gastric tube comprises an inner tube 1, an outer tube 2, an inner tube joint 3 and an extension tube 4.

[0033] Referring to the drawings accompanying the specification Figure 2 The inner tube 1 comprises an inner tube tube body 11 and an inner tube end head 12 fixedly connected to the rear end of the inner tube tube body 11. The inner tube end head 12 is a hollow structure communicating with the inner cavity of the inner tube tube body 11. The inner wall surface of the inner tube end head 12 is provided with a first thread 121. The front section of the inner tube tube body 11 is provided with a plurality of side holes 111. The side holes 111 serve as passage openings for communicating the stomach cavity and the inner cavity of the inner tube tube body 11. The front end of the inner tube tube body 11 is a round head structure, which is smooth and can further reduce the damage of the inner tube tube body 11 to the gastric mucosa, and can prevent bleeding, pain and other discomfort to a certain extent. The outer wall of the inner tube tube body 11 is marked with scale lines and corresponding scale values indicating the length, so that the length of the inner tube tube body 11 can be observed intuitively.

[0034] Referring to the drawings accompanying the specification Figure 3The outer tube 2 comprises an outer tube body 21 and an outer tube end 22 fixedly connected to the front end of the outer tube body 21. The outer tube end 22 is a hollow structure communicating with the inner cavity of the outer tube body 21. The outer diameter of the inner tube body 11 and the inner tube end 12 is smaller than the inner diameter of the outer tube body 21 and the outer tube end 22. The outer tube 2 is sleeved outside the inner tube 1. The inner tube 1 can slide along the axis of the outer tube 2, and the outer tube 2 can slide along the axis of the inner tube 1. The front section of the inner tube body 11 extends out of the front end of the outer tube body 21. A plurality of side holes 111 are formed in the section of the inner tube body 11 extending out of the outer tube body 21 (the length of the section is about 5-9 cm).

[0035] A scale line indicating length and a corresponding scale value are marked on the outer wall of the outer tube body 21, so that the length of the outer tube body 21 placed can be visually observed. The front end face of the outer tube body 21 is a circular ring structure. The inner and outer edges of the circular ring structure are arc-shaped transitions, so that the edge of the front end face of the outer tube body 21 is smooth and round, which can prevent damage to the gastric mucosa or esophageal mucosa and other parts when the outer tube body 21 is placed, and can further reduce the damage of the outer tube body 21 to the gastric mucosa or esophageal mucosa, thereby preventing bleeding, pain and other discomfort to a certain extent.

[0036] Referring to the drawings accompanying the specification Figure 4 The inner tube connector 3 comprises a tapered tube 31, a connecting tube 32, a closure cap 33 and a connecting band 34. The tapered tube 31 is a hollow conical structure with a closed front end face and an open rear end face. The connecting tube 32 is fixedly connected to the front end face of the tapered tube 31 and communicates with the inner cavity of the tapered tube 31. The tapered tube 31 is made of elastic material and is used to connect a syringe or other instruments to extract gastric contents or inject drugs, nutrient solution or food through the inner tube 1. The closure cap 33 is connected to the rear end of the tapered tube 31 through the connecting band 34. The closure cap 33 is used to close the rear end face of the tapered tube 31 when gastric contents or drugs, nutrient solution or food are not needed to be extracted or injected through the inner tube.

[0037] A second thread 321 is arranged on the outer wall surface of the connecting tube 32. The first thread 121 is threadedly connected with the second thread 321, so as to realize detachable connection of the inner tube end 12 and the connecting tube 32, and realize detachable connection of the inner tube 1 and the inner tube connector 3.

[0038] In order to ensure the sealed connection of the inner tube 1 and the inner tube connector 3 and prevent gastric contents or drugs, nutrient solution or food from leaking, a rubber sealing ring is arranged on the front end face of the tapered tube 31. After the inner tube end 12 and the connecting tube 32 are threadedly connected in place, the sealing ring is tightly clamped between the end face of the inner tube end 12 and the front end face of the tapered tube 31, so as to prevent gastric contents or drugs, nutrient solution or food from leaking from the connection between the inner tube end 12 and the connecting tube 32.

[0039] Referring to the drawings accompanying the specification Figure 9The extension tube 4 includes an extension tube body 41 and an extension tube head 42 fixedly connected to the front end of the extension tube body 41. The extension tube body 41 and / or the extension tube head 42 can be solid or hollow. The fifth thread 421 is arranged on the outer wall of the extension tube head 42. The first thread 121 is threadedly connected with the fifth thread 421, thereby achieving detachable connection between the inner tube head 12 and the extension tube head 42, and achieving detachable connection between the inner tube 1 and the extension tube 4.

[0040] The outer diameter of the extension tube body 41 and the extension tube head 42 is smaller than the inner diameter of the outer tube body 21 and the outer tube head 22. The length of the extension tube body 41 is greater than or equal to the length of the outer tube 2. The outer tube 2 slides along the axis of the inner tube 1 and the extension tube 4, thereby achieving insertion or extraction of the outer tube 2 along the inner tube 1 and the extension tube 4.

[0041] The use method of the double-layer gastric tube in the embodiment 1 is as follows: when the gastric tube is inserted for the first time, the patient is assisted to take a semi-recumbent position, a treatment towel is laid, the nostrils or oral cavity of the patient is cleaned, the nostril or oral cavity with smooth ventilation is selected to insert the tube, the outer tube 2 is taken out, the front section of the outer tube 2 is lubricated with paraffin oil, the outer tube 2 is held by the left hand with a gauze, the front section of the outer tube 2 is clamped by the right hand with a forceps, the outer tube 2 is inserted along the selected nostril or oral cavity, is first inserted slightly upward, then parallel, and then slowly and gently downward, is inserted slowly to the throat (14-16 cm), the patient is ordered to make a swallowing action, the outer tube 2 is pushed forward along with the swallowing action of the patient, until the predetermined length, whether the outer tube 2 is successfully inserted is determined by using the gastric juice extraction method and / or the air-water sound method, and the outer tube 2 is fixed by using medical tape and the like after being successfully inserted;

[0042] The inner tube 1 is taken out, the inner tube joint 3 is connected with the inner tube 1 through the thread connection between the inner tube head 12 and the connecting tube 32, the front section of the inner tube 1 is lubricated with paraffin oil, the outer tube 2 is held by the left hand with a gauze, the front section of the inner tube 1 is clamped by the right hand with a forceps, the inner tube 1 is inserted along the outer tube 2, until the predetermined length (which can be preliminarily judged by the length scale and corresponding scale value marked on the outer walls of the inner tube body 11 and the outer tube body 21), the side hole 111 provided on the front section of the inner tube 1 extends out of the front end of the outer tube 2, the inner tube 1 and / or the inner tube joint 3 is fixed by using medical tape and the like after being successfully inserted; when gastric contents need to be extracted or drugs, nutrient solution or food need to be injected through the inner tube, only the closure cap 33 needs to be opened, the syringe and the like are connected with the conical tube 31 in a sealed manner, and then gastric content extraction or drug, nutrient solution or food injection operation can be performed, after the gastric content extraction or drug, nutrient solution or food injection operation is completed, the conical tube 31 is resealed through the closure cap 33.

[0043] When the inner tube 1 needs to be replaced due to blockage or other reasons, the fixation of the inner tube 1 is released, the gauze is held with the left hand to support the outer tube 2, the forceps are held with the right hand to clamp the rear section of the inner tube 1, the inner tube 1 is pulled out along the outer tube 2, and the inner tube 1 is discarded in a medical garbage can after being pulled out, and a new inner tube 1 is taken out, and the inner tube 1 is successfully placed along the outer tube 2 and fixed by using the same inner tube 1 placement method as described above;

[0044] When the outer tube 2 needs to be replaced, the inner tube end 12 is unscrewed from the connecting tube 32, the inner tube connector 3 is separated from the inner tube 1, the extension tube 4 is taken out, the inner tube connector 3 is connected with the extension tube 4 through the threaded connection of the inner tube end 12 and the extension tube end 42, the fixation of the outer tube 2 is released, the gauze is held with the left hand to support the inner tube 1 and the extension tube 4, the forceps are held with the right hand to clamp the rear section of the outer tube 2, the outer tube 2 is pulled out along the inner tube 1 and the extension tube 4, the outer tube 2 is discarded in a medical garbage can after being pulled out, a new outer tube 2 is taken out, the front section of the outer tube 2 is lubricated with paraffin oil, the gauze is held with the left hand to support the inner tube 1 and the extension tube 4, the forceps are held with the right hand to clamp the front section of the outer tube 2, the outer tube 2 is inserted along the extension tube 4 and the inner tube 1 until a predetermined length, and the outer tube 2 is fixed after being successfully placed by using medical adhesive tape and the like.

[0045] Example 2

[0046] The inventor found that when the inner tube 1 and the outer tube 2 are respectively placed in position, it is necessary to fix the positions of the inner tube 1 and the outer tube 2, on the one hand to prevent the gastric tube from being pulled out or displaced as a whole, and on the other hand to prevent the inner tube 1 and the outer tube 2 from being relatively displaced, and if the positions of the inner tube 1 and the outer tube 2 are fixed respectively, the difficulty of fixation will be increased, and it is difficult to ensure that the inner tube 1 and the outer tube 2 do not relatively displace; at the same time, since the inner tube 1 and the outer tube 2 are in a sleeved structure and are connected in a sliding manner, a cavity will inevitably be formed between the inner tube 1 and the outer tube 2, and gastric contents may leak along the cavity;

[0047] Therefore, in view of the above problems, based on Example 1 and with reference to the description and drawings of the present application, Figure 5 、 9 A double-layer gastric tube includes an inner tube 1, an outer tube 2, an inner tube connector 3, an extension tube 4, and a connecting structure for detachably connecting the inner tube connector 3 and the outer tube 2.

[0048] With reference to the description and drawings of the present application, Figures 6-7The connecting structure comprises the connecting sleeve 23 and the connecting plate 35. The connecting sleeve 23 is a hollow cylindrical structure with an open rear end and a sleeve hole 232 formed in the front end. The connecting sleeve 23 is sleeved on the outer tube body 21 and the open rear end of the connecting sleeve 23 faces the outer tube end 22. A third thread 231 is arranged on the inner wall of the connecting sleeve 23. The diameter of the sleeve hole 232 is smaller than the outer diameter of the outer tube end 22 and larger than the outer diameter of the outer tube body 21, so that the connecting sleeve 23 can move along the outer tube body 21 and is limited by the outer tube end 22.

[0049] Referring to the drawings Figure 8 The connecting plate 35 is fixedly installed outside the conical tube 31 of the inner tube joint 3, and a fourth thread 351 is arranged on the outer wall of the connecting plate 35.

[0050] The third thread 231 is threadedly connected with the fourth thread 351, so that the connecting sleeve 23 and the connecting plate 35 are detachably connected, and the inner tube joint 3 and the outer tube 2 are also detachably connected.

[0051] Since the rear end of the connecting sleeve 23 is limited by the outer tube end 22, in order to prevent the connecting sleeve 23 from entering the nasal cavity or oral cavity of the patient when moving along the outer tube body 21, the front end of the connecting sleeve 23 also needs to be limited. Referring to the drawings Figures 6-7 The connecting structure further comprises a limiting plate 24 fixedly arranged outside the outer tube body 21. The limiting plate 24 is a distance away from the outer tube end 22. The front end of the connecting sleeve 23 is between the outer tube end 22 and the limiting plate 24, and the diameter of the sleeve hole 232 is smaller than the outer diameter of the limiting plate 24. Therefore, the connecting sleeve 23 can only move along the outer tube body 21 between the outer tube end 22 and the limiting plate 24.

[0052] After the inner tube 1 and the outer tube 2 are placed in position, a sealing ring is first sleeved outside the connecting tube 32. After the inner tube end 12 is threadedly connected with the connecting tube 32, the sealing ring is tightly clamped between the end surface of the inner tube end 12 and the front end surface of the conical tube 31, so as to prevent gastric contents, drugs, nutrient solution or food from leaking from the connection between the inner tube end 12 and the connecting tube 32. The outer tube 2 is close to the inner tube joint 3, the connecting sleeve 23 is sleeved on the connecting plate 35, and the connecting sleeve 23 is rotated to threadedly connect the connecting sleeve 23 and the connecting plate 35 through the third thread 231 and the fourth thread 351. After the connecting sleeve 23 and the connecting plate 35 are threadedly connected in position, the sealing ring is tightly clamped between the end surface of the outer tube end 22 and the front end surface of the conical tube 31, so as to realize the detachable and fixed connection between the inner tube joint 3 and the outer tube 2, and to close the cavity between the inner tube 1 and the outer tube 2, thereby preventing gastric contents from leaking from the connection between the outer tube end 22 and the connecting tube 32.

[0053] The method for using the double-layer gastric tube in this embodiment 2 is as follows: when the gastric tube is inserted for the first time, the patient is assisted to take a semi-recumbent position, a treatment towel is laid, the patient's nostrils or oral cavity is cleaned, the nostril or oral cavity with smooth ventilation is selected to insert the tube, the outer tube 2 is taken out, the front section of the outer tube 2 is lubricated with paraffin oil, the outer tube 2 is held by the left hand with a gauze, the outer tube 2 is held by the right hand with a forceps, the outer tube 2 is inserted along the selected nostril or oral cavity, is inserted slowly and gently first upward, then parallel, and then downward, is inserted to the throat (14-16 cm), the patient is ordered to make a swallowing action, the outer tube 2 is pushed forward along with the swallowing action of the patient, until the predetermined length, whether the outer tube 2 is successfully placed is determined by using the gastric juice extraction method and / or the air-water sound method, and the outer tube 2 is fixed by using medical tape and the like after successful placement;

[0054] The inner tube 1 is taken out, the inner tube joint 3 is connected with the inner tube 1 through the threaded connection between the inner tube end 12 and the connecting pipe 32, the front section of the inner tube 1 is lubricated with paraffin oil, the outer tube 2 is held by the left hand with a gauze, the front section of the inner tube 1 is held by the right hand with a forceps, the inner tube 1 is inserted along the outer tube 2, until the predetermined length (which can be preliminarily judged by the length indicating graduation lines and corresponding graduation values marked on the outer wall of the inner tube body 11 and the outer tube body 21), the side hole 111 provided on the front section of the inner tube 1 extends out of the front end of the outer tube 2, the outer tube 2 is fixedly connected with the inner tube joint 3 through the threaded connection between the connecting sleeve 23 and the connecting plate 35, and the inner tube 1 and / or the inner tube joint 3 is fixed by using medical tape and the like after successful placement; when gastric contents need to be extracted or drugs, nutrient solution or food need to be injected through the inner tube, the gastric content extraction or the drug, nutrient solution or food injection operation can be performed only by opening the closure cap 33, sealingly connecting a syringe and the like with the conical pipe 31, and re-sealing the conical pipe 31 through the closure cap 33 after the gastric content extraction or the drug, nutrient solution or food injection operation is completed.

[0055] When the inner tube 1 needs to be replaced due to blockage or other reasons, the fixation of the inner tube 1 is released, the connecting sleeve 23 and the connecting plate 35 are loosened through the thread, the outer tube 2 is separated from the inner tube joint 3, the outer tube 2 is held by the left hand with a gauze, the rear section of the inner tube 1 is held by the right hand with a forceps, the inner tube 1 is pulled out towards the outer tube 2, the inner tube 1 is discarded in a medical waste bin after being pulled out, a new inner tube 1 is taken out, and the inner tube 1 is successfully placed along the outer tube 2 and fixed by using the same inner tube 1 placement method as described above;

[0056] When the outer tube 2 needs to be replaced, the connecting sleeve 23 and the connecting plate 35 are loosened by screwing, the outer tube 2 is separated from the inner tube joint 3, the inner tube end 12 and the connecting tube 32 are loosened by screwing, the inner tube joint 3 is separated from the inner tube 1, the extension tube 4 is taken out, the inner tube joint 3 and the extension tube 4 are connected through the threaded connection of the inner tube end 12 and the extension tube end 42, the fixation of the outer tube 2 is released, the left hand holds the gauze to support the inner tube 1 and the extension tube 4, the right hand holds the tweezers to hold the rear section of the outer tube 2, the outer tube 2 is pulled out along the inner tube 1 and the extension tube 4, the outer tube 2 is discarded in the medical waste bin after being pulled out, and a new outer tube 2 is taken out, the front section of the outer tube 2 is lubricated with paraffin oil, the left hand holds the gauze to support the inner tube 1 and the extension tube 4, the right hand holds the tweezers to hold the front section of the outer tube 2, the outer tube 2 is inserted along the extension tube 4 and the inner tube 1, and the outer tube 2 is inserted until the predetermined length, and the outer tube 2 is fixed after being successfully placed by using medical tape and other articles.

[0057] It is clear that the double-layer gastric tube and the corresponding method described above can be modified and / or increased in parts without departing from the field and scope of the present application.

[0058] It is also clear that, although the double-layer gastric tube has been described in detail, those skilled in the art can obtain many other equivalent forms of double-layer gastric tube and corresponding methods having the features as claimed in the claims, and thus all fall within the scope of protection defined thereby.

Claims

1. A double-lumen gastric tube, characterized by: The double-layer gastric tube comprises an inner tube (1), an outer tube (2) and an inner tube joint (3), the inner tube (1) comprises an inner tube body (11) and an inner tube end head (12) fixedly connected to the rear end of the inner tube body (11), and the inner tube joint (3) is detachably and sealingly connected to the inner tube end head (12); The outer tube (2) is sleeved outside the inner tube (1), the outer diameters of the inner tube body (11) and the inner tube end head (12) are smaller than the inner diameter of the outer tube (2), the front section of the inner tube body (11) extends out of the front end of the outer tube (2), a plurality of side holes (111) are formed in the front section of the inner tube body (11) extending out of the outer tube (2), and the inner tube (1) can slide along the axis of the outer tube (2).

2. The double-lumen gastric tube of claim 1, wherein: The double-layer gastric tube further comprises an extension tube (4), the extension tube (4) comprises an extension tube body (41) and an extension tube end head (42) fixedly connected to the front end of the extension tube body (41), the inner wall surface of the inner tube end head (12) is provided with a first thread (121), the outer wall surface of the extension tube end head (42) is provided with a fifth thread (421), and the first thread (121) and the fifth thread (421) are threadedly connected, so as to realize the detachable connection between the inner tube end head (12) and the extension tube end head (42). The outer diameters of the extension tube body (41) and the extension tube end head (42) are smaller than the inner diameter of the outer tube (2), and the length of the extension tube body (41) is greater than or equal to the length of the outer tube (2), so that the outer tube (2) can slide along the axes of the inner tube (1) and the extension tube (4).

3. The double-lumen gastric tube of claim 1, wherein: The inner tube joint (3) comprises a conical tube (31), a connecting tube (32), a sealing cap (33) and a connecting belt (34), the conical tube (31) is a hollow conical structure with a closed front end surface and an open rear end surface, the connecting tube (32) is fixedly connected to the front end surface of the conical tube (31) and communicates with the inner cavity of the conical tube (31), and the sealing cap (33) is connected to the rear end of the conical tube (31) through the connecting belt (34) and is used for sealing the rear end surface of the conical tube (31). The inner wall surface of the inner tube end head (12) is provided with a first thread (121), the outer wall surface of the connecting tube (32) is provided with a second thread (321), and the first thread (121) and the second thread (321) are threadedly connected, so as to realize the detachable connection between the inner tube end head (12) and the connecting tube (32).

4. The double-lumen gastric tube of claim 1, wherein: The outer tube (2) comprises an outer tube body (21) and an outer tube end head (22) fixedly connected to the front end of the outer tube body (21).

5. The dual-lumen gastric tube of claim 4, wherein: The double-layer gastric tube further comprises a connecting structure for detachably connecting the inner tube joint (3) and the outer tube (2), the connecting structure comprises a connecting sleeve (23) and a connecting plate (35), the connecting sleeve (23) is a hollow cylindrical structure with an open rear end surface and a sleeve hole (232) formed in the front end surface, the connecting sleeve (23) is sleeved outside the outer tube body (21) and the open rear end surface of the connecting sleeve (23) faces the outer tube end head (22), and the diameter of the sleeve hole (232) is smaller than the outer diameter of the outer tube end head (22) and greater than the outer diameter of the outer tube body (21). A third thread (231) is arranged on the inner wall surface of the connecting sleeve (23), the connecting plate (35) is fixedly installed on the inner tube joint (3), a fourth thread (351) is arranged on the outer wall surface of the connecting plate (35), the third thread (231) is threadedly connected with the fourth thread (351), and the detachable connection of the connecting sleeve (23) and the connecting plate (35) is realized.

6. The dual-lumen gastric tube of claim 5, wherein: The connecting structure further comprises a limiting plate (24) fixed to the outer side of the outer tube body (21), the front end surface of the connecting sleeve (23) is located between the outer tube end (22) and the limiting plate (24), and the diameter of the sleeve hole (232) is smaller than the outer diameter of the limiting plate (24).

7. The double-lumen gastric tube of claim 3, wherein: A sealing ring is arranged on the front end surface of the conical tube (31).

8. The dual-lumen gastric tube of claim 1, wherein: The front end of the inner tube body (11) is a round head structure, and the front end surface of the outer tube (2) is a circular ring structure, and the inner and outer edges of the circular ring structure are arc-shaped transitions.

9. The dual-lumen gastric tube of claim 1, wherein: The inner tube body (11) and the outer tube (2) are marked with scale lines and corresponding scale values indicating lengths on the outer walls thereof.

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