Gastrointestinal drug delivery device for gastroenterology.
The gastrointestinal drug delivery device addresses pain and inaccuracy issues by using a tip guide and expandable plate for controlled drug insertion, preventing secondary damage and ensuring precise dosage.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-01-29
- Publication Date
- 2026-03-31
AI Technical Summary
Conventional digestive tract drug introducers cause pain and bleeding due to tip insertion, risk intestinal infection, decrease operability, and result in inaccurate dosage due to drug leakage and improper insertion depth.
A gastrointestinal drug delivery device with a tip guide part for initial insertion, followed by a deployable expandable curved plate that secures space without forcing anal sphincter expansion, ensuring precise drug administration tube placement and minimizing secondary damage.
Prevents secondary injury by controlled expansion, maintains accurate dosage, and enhances operational efficiency through synchronized expansion and retraction mechanisms.
Smart Images
Figure 0003255311000001_ABST
Abstract
Description
Technical Field
[0004] , , ,
[0001] This invention belongs to the technical field of medical devices, and particularly relates to a digestive tract drug introducer for gastroenterology.
Background Art
[0002] In the clinical diagnosis and treatment of gastroenterology, the digestive tract drug introducers conventionally used have the following problems. In a syringe-type drug introducer, when the tip is inserted into the anus and rectum, it is likely to damage the perianal skin and rectal mucosa, causing pain and bleeding, and there is also a risk of secondary disorders such as intestinal infection. Further, even when the needle part is removed for the purpose of avoiding damage by the tip, not only does the operability decrease, but the burden on the perianal tissue increases. Moreover, there is a problem that the administration tube does not reach the predetermined insertion depth, and the drug solution leaks out, impairing the accuracy of the dosage. From the above, there is a strong demand for a digestive tract drug introduction means that can control the expansion operation and simplify the operation procedure while avoiding secondary damage.
Summary of the Invention
[0003] This invention is made to solve the problems of the above prior art, and an object thereof is to provide a digestive tract drug introducer for gastroenterology. In the digestive tract drug introducer according to this invention, a configuration is adopted in which the tip guide part is first inserted into the anus for initial guidance, and then the expansion member is gradually deployed in conjunction with the movement of the operation part. Thereby, sufficient space for inserting the drug administration tube can be secured without forcibly expanding the anal sphincter. Further, since the administration tube is introduced into the rectum in conjunction with the insertion operation, excessive compression is not required, and secondary damage to the patient can be effectively prevented.
[0004] The technical means adopted by this invention are as follows. This invention provides a gastrointestinal drug delivery device for gastroenterology, comprising a housing in which a guide tube is fitted and fixed, forming a stable sliding passage. A drug delivery tube is slidably inserted inside the guide tube to facilitate drug delivery. A tip guide portion is fixed to one end of the guide tube opposite to the housing side, and functions as an initial insertion member into the anus. A circumferentially arranged expandable curved plate is slidably provided on the outer circumference of the tip guide portion on the housing side, adapting to the gastrointestinal condition of each patient and forming a stable support structure. An operating drive cylinder is slidably provided inside the housing, and the operating drive cylinder is linked to the drug delivery tube and the expandable curved plate. Furthermore, a tapered operating member is fixed to the inner circumference of the expanded curved plate, and the tapered operating member is positioned on the movement path of the operating drive cylinder, thereby accurately and stably expanding the expanded curved plate. Furthermore, a return spring is fixed to the inner circumference of the expandable curved plate, and the other end of the return spring is fixed to the outer circumference of the guide tube. In its natural state, it holds the expandable curved plate in a contracted state, stores elastic energy when expanded, and performs a return operation after drug administration. Furthermore, a pressure receiving portion is fixed to the outer circumference of the drug administration tube, which transmits thrust and tensile forces to cause the drug administration tube to move forward and return to its original position. Furthermore, a pressing ring is fixed to the inner wall of the operating drive cylinder, and the pressing ring comes into contact with a pressing receiving part, pressing the pressing receiving part to move the drug administration tube synchronously.
[0005] This invention provides the following effects. (1) By inserting the tip guide section first, the expanded curved plate on the side of the tip guide section is unfolded by the transmission of the operating drive cylinder and tapered operating member, effectively preventing secondary injury to the patient without excessive pressure. (2) The amount of expansion of the curved panel can be precisely controlled, and the operating drive cylinder is returned in synchronous motion by pressing the pressing ring via the pressing receiving part, and the expanded curved panel is pulled back by the return spring, thereby improving operating efficiency. [Brief explanation of the drawing]
[0006] [Figure 1] Figure 1 is a schematic diagram of the gastrointestinal drug delivery device according to the present invention. [Figure 2] Figure 2 is a cross-sectional view showing the cross-sectional structure of the gastrointestinal drug delivery device according to the present invention. [Figure 3] Figure 3 is an enlarged view of section A in Figure 2. [Figure 4] Figure 4 shows the transmission structure between the tip guide section and the extended curved plate. [Modes for carrying out the invention]
[0007] Example 1 Referring to Figures 1 to 4, the gastrointestinal drug delivery device for internal medicine according to this embodiment will be described. The gastrointestinal drug delivery device of this embodiment comprises a housing 1. The housing 1 has a plurality of locking holes 11 formed at intervals along its longitudinal direction, and these locking holes 11 are for controlling the expansion amount of the expandable curved plate 5, which will be described later, in stages. A guide tube 2 is fitted and fixed inside the housing 1. A drug delivery tube 3 is slidably inserted inside the guide tube 2. A plurality of nozzles are formed in the circumferential direction on the tip side (tip guide portion 4 side) of the drug delivery tube 3. A pressure receiving portion 9 is fixed to the outer circumference of the drug delivery tube 3, and a second spring 14 is attached to the side surface of the pressure receiving portion 9. The other end of the second spring 14 is fixed to the inner wall of the housing 1, and in its natural state, the drug delivery tube 3 is held in its storage position, elastic energy is accumulated during the delivery operation, and after the delivery is completed, it automatically returns to its original position. A tip guide portion 4 is fixed to the end of the guide tube 2 that is away from the housing 1. An expanded curved plate 5 is slidably provided on the outer circumference of the tip guide portion 4 on the housing 1 side, and is arranged in the circumferential direction. An operating drive cylinder 6 is slidably provided inside the housing 1, and the end of the operating drive cylinder 6 on the expanded curved plate 5 side is tapered. A pressing ring 10 is fixed to the inner wall of the operating drive cylinder 6, and the pressing ring 10 is configured to be in contact with the pressing receiving portion 9. A tapered operating member 7 is fixed to the inner circumference side of the expanded curved plate 5, and the operating member 7 is positioned on the movement path of the operating drive cylinder 6.
[0008] Furthermore, a return spring 8 is fixed to the inner circumference of the expanded curved plate 5, and the other end of the return spring 8 is fixed to the outer circumference of the guide tube 2. A tapered locking member 12 is slidably provided on the outer circumference of the operating drive cylinder 6, and a first spring 13 is attached to the side surface of the tapered locking member 12, and the other end of the first spring 13 is fixed to the outer circumference of the operating drive cylinder 6, thereby providing a stable biasing force to the tapered locking member 12 and ensuring the reliability of the locking and return operations.
[0009] When using the gastrointestinal drug delivery device of this embodiment, the drug solution is drawn into a syringe or an infusion bag is connected and connected to the end of the drug delivery tube 3 opposite the tip guide portion 4 via a connecting means such as a Luer taper. The operator grasps the housing 1, faces the tip guide portion 4 toward the patient's anus, and slowly pushes it forward to insert the tip guide portion 4 into the anus. The pushing motion is stopped when the expansion curved plate 5 is completely inside the anus. Then, the operator holds the housing 1 with one hand and pushes the operating drive cylinder 6 toward the expansion curved plate 5 with the other hand. At this time, the pressing force of the operating drive cylinder 6 causes the tapered locking member 12 to move along the inclined surface of the locking hole 11, compressing the first spring 13, and disengaging from the locking hole 11. As the operating drive cylinder 6 moves further forward, the expansion curved plate 5 is gradually pushed outward by contact with the tapered operating member 7. As a result, the anal sphincter muscle adapts to the expanded state in stages without undergoing abrupt deformation. Depending on the patient's sphincter muscle tension and treatment objectives, the operating drive cylinder 6 is advanced in stages, and the tapered locking member 12 is engaged with a predetermined locking hole 11, thereby stably maintaining the expansion amount of the expansion curved plate 5. In this state, the expansion curved plate 5 forms a support structure that resists the contractile force of the anal sphincter muscle.
[0010] As the operating cylinder 6 moves forward, the pressing ring 10 on the inner circumference of the operating cylinder 6 presses against the pressing receiving part 9, moving the drug administration tube 3 toward the tip guide part 4. When the operating cylinder 6 stops moving, the tip of the drug administration tube 3 has passed the tip guide part 4 and is inserted into the rectum. Subsequently, the operator slowly pushes the plunger of the syringe or opens the valve of the infusion bag to administer the drug solution through the drug administration tube 3 to the rectal wall from the nozzle.
[0011] After administration is complete, the operator presses the tapered locking member 12 on the outer circumference of the operating drive cylinder 6 with their finger, compressing the first spring 13 and releasing it from the locking hole 11. This releases the elastic energy of the second spring 14, causing the drug administration tube 3 to retract via the pressure receiving part 9. As the drug administration tube 3 retracts, the pressure receiving part 9 pushes back the pressure ring 10. This causes the drug administration tube 3 to return to the guide tube 2, and the operating drive cylinder 6 also returns to its initial position. Simultaneously with this return movement, the return spring 8 releases its elastic energy, pulling the expanded curved plate 5 inward along the guide groove of the tip guide part 4, returning it to its initial contracted state. At this time, the device can be safely removed from the body by slowly pulling out the housing 1. [Explanation of Symbols]
[0012] 1 cabinet 2 Guide tubes 3. Drug administration tube 4. Tip guide section 5. Extended curved panel 6. Operating drive cylinder 7 Tapered operating member 8. Return spring 9 Pressure receiving part 10 Compression ring 11 Locking hole 12 Tapered locking member 13 First spring 14. Second spring
Claims
1. A gastrointestinal drug delivery device for internal medicine, comprising a housing, A guide tube is fitted and fixed inside the housing. A drug administration tube is slidably inserted inside the guide tube. A tip guide portion is fixed to one end of the guide tube opposite to the housing side. An expanded curved plate is slidably provided on the outer circumference of the housing side of the aforementioned tip guide portion, arranged in the circumferential direction. An operating drive cylinder is slidably provided inside the housing, The aforementioned operating drive cylinder is linked to the drug administration tube and the expansion curved plate. A gastrointestinal drug delivery device for gastroenterology, featuring the following characteristics.
2. A tapered operating member is fixed to the inner circumference side of the aforementioned expanded curved plate. The tapered operating member is positioned on the movement path of the operating drive cylinder. A gastrointestinal drug delivery device for gastroenterology according to claim 1, characterized by the above.
3. A return spring is fixed to the inner circumference side of the aforementioned expanded curved plate. The other end of the return spring is fixed to the outer circumference of the guide tube. A gastrointestinal drug delivery device for gastroenterology according to claim 1, characterized by the above.
4. The pressure receiving portion is fixed to the outer circumference of the drug administration tube. A gastrointestinal drug delivery device for gastroenterology according to claim 1, characterized by the above.
5. A pressing ring is fixed to the inner wall of the aforementioned operating drive cylinder. The pressing ring comes into contact with the pressing receiving portion. A gastrointestinal drug delivery device for gastroenterology according to claim 4, characterized by the above.