In-vivo stretching drug delivery device and equipment

Abstract

The utility model belongs to the field of medical auxiliary appliances, solves the problem that in the prior art, the treatment mode of stretching into the body of a patient for administration is inconvenient, and provides an in-vivo stretching administration device and equipment. The catheter is connected with the medicine placing mechanism and is used for guiding the liquid medicine in the medicine placing mechanism into a human body; the handheld mechanism is arranged at the insertion end, inserted into the body, of the catheter and used for holding and fixing the insertion end of the catheter. The problem that medicine is wasted and inconvenient to use is solved through the medicine placing mechanism, and the length of the insertion end, stretching into the body, of the catheter is controlled through the handheld mechanism in a telescopic mode, and the catheter is fixed. The dosing device provided by the utility model is simple in structure and convenient to mount / dismount.

Description

Technical Field

[0001] The utility model relates to the field of medical auxiliary appliances, in particular to a drug delivery device and equipment inserted into the body. Background Art

[0002] Anal administration refers to the method of delivering drugs into the rectum through the anus. It has the advantages of being simple and convenient, avoiding gastrointestinal irritation, less pain, high bioavailability, and fewer side effects. However, due to the location of the anus and the sensitivity of the patient, when administering drugs through the anus, the drug may enter shallowly, the patient may shake unconsciously when taking the drug, and the drug may flow out. Or, because the front end of the drug delivery device is too short, the length of the drug inserted into the anus is insufficient, and the drug cannot play a good role. For example, when the patient uses a suppository to lubricate defecation, the front end of the suppository bottle is too short, resulting in insufficient length of the drug entering the anus. The suppository is easily exposed outside the body, resulting in drug waste and failure to play the proper lubricating role. At the same time, due to the location of the anus, the patient's posture is uncomfortable, and the direct use of the suppository bottle will cause the drug in the bottle to be used uncleanly, resulting in drug waste. Utility Model Content

[0003] In view of this, an embodiment of the utility model provides a drug delivery device and equipment that is inserted into the body to solve the technical problem of inconvenient drug delivery in the patient's body.

[0004] In a first aspect, the present invention provides a drug delivery device and apparatus for inserting into the body, the drug delivery device comprising:

[0005] A medicine placing mechanism (1), used for placing medicine;

[0006] A catheter (3) connected to the drug delivery mechanism (1) and used to introduce the drug solution in the drug delivery mechanism (1) into the body;

[0007] A hand-held mechanism (2) is arranged at the insertion end (31) of the catheter (3) inserted into the body, and is used to hold and fix the insertion end (31) of the catheter (3).

[0008] Preferably, the drug delivery device further comprises an infusion valve (4), wherein the infusion valve (4) is provided with a first end (41), a second end (42) and an infusion end (43);

[0009] The first end (41) is connected to the drug releasing mechanism (1) via a first catheter (32), the second end (42) is connected to a second catheter (33), and the other end of the second catheter (33) passes through the hand-held mechanism (2) and is inserted into the body;

[0010] One side of the infusion end (43) is connected to a movable protrusion (431), and the movable protrusion (431) matches the port of the infusion end (43) and is used to be inserted into the port of the infusion end (43).

[0011] Preferably, the drug delivery device further comprises a snap-fitting member (5), wherein the snap-fitting member (5) comprises a snap-fitting body (51), a snap-fitting portion (52), and a pressing portion (53);

[0012] Two through holes are arranged at opposite ends of the engaging body (51) for the conduit (3) to pass through;

[0013] The clamping portion (52) comprises a clamping end (521) and a clamping end (522), which are respectively arranged at two ends of the clamping body (51);

[0014] The extrusion portion (53) comprises a first extrusion portion (531) and a second extrusion portion (532); the first extrusion portion (531) is arranged between two through holes of the engaging body (51); and the second extrusion portion (532) is arranged at the engaging end (521).

[0015] Preferably, the engaging member is integrated with the infusion valve to close the flow of the catheter.

[0016] Preferably, the drug delivery device is provided with a connecting tube, one end of which is connected to the catheter (3), and the other end of which is connected to the drug delivery mechanism (1).

[0017] Preferably, the hand-held mechanism (2) comprises a bottleneck end (21) and a bottle body end (22); the catheter (3) penetrates from the bottom of the bottle body end (22) and exits from the port (211) of the bottleneck end (21); the catheter (3) and the hand-held mechanism (2) move relative to each other, so as to control the length of the catheter (3) inserted into the body.

[0018] Preferably, the drug releasing mechanism (1) comprises a main body (11) and a push-pull member (12); the push-pull member (12) is arranged in the main body (11) and slides relative to the main body (11) to suck in or push out the drug.

[0019] Preferably, the engaging member (5) comprises a first engaging member (501) and a second engaging member (502), wherein the first engaging member (501) is used to close the flow of the first conduit (32), and the second engaging member (502) is used to close the flow of the second conduit (33).

[0020] Preferably, the infusion valve (4) can be replaced by a three-way pipe.

[0021] In a second aspect, an embodiment of the utility model provides a device, which includes the in vivo drug delivery device provided in the first aspect.

[0022] In summary, the beneficial effects of the utility model are as follows:

[0023] The in-vivo drug delivery device and apparatus provided by the embodiment of the utility model is connected with one end of the catheter through a drug delivery mechanism, and the other end of the catheter is inserted into the body, and the drug contained in the drug delivery mechanism is delivered into the body through the catheter. The length of the catheter is set according to the demand for drug delivery. Before drug delivery, the drug is inhaled into the drug delivery mechanism, and then discharged into the body through the catheter, so that drug delivery is easily achieved. Since the length of the catheter can be freely selected according to the demand for drug delivery, the drug delivery can be achieved without the patient posing in an uncomfortable posture, which avoids the patient's emotional tension caused by the awkward medication position to a certain extent.

[0024] The setting of the medicine dispensing mechanism not only facilitates the medication for patients, but also avoids the waste of medicine and realizes the precise control of the dosage;

[0025] At the same time, the utility model is provided with a hand-held mechanism at the insertion end of the catheter extending into the body, which is convenient for fixing and controlling the insertion end of the catheter extending into the body when administering medicine to the patient, and accurately controlling the length of the catheter extending into the body when administering medicine to the patient, thereby ensuring that the medicine will not flow out of the body due to the insertion end extending into the body being too short, and also avoiding discomfort to the patient due to the insertion end being too long. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment of the utility model will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the utility model.

[0027] Figure 1 This is a schematic diagram of the structure of the drug delivery device for inserting into the body provided by the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the drug delivery device for inserting into the body provided by the utility model;

[0029] Figure 3 This is a schematic diagram of the structure of the drug delivery device for inserting into the body provided by the utility model;

[0030] Figure 4 This is a schematic diagram of the structure of the drug delivery device for inserting into the body provided by the utility model;

[0031] Figure 5 A schematic diagram of the structure of a clamping member extending into a drug delivery device provided by the utility model;

[0032] Figure 6 A schematic diagram of the structure of the clamping member of the drug delivery device provided by the utility model being closed;

[0033] Figure 7 A schematic diagram of the structure of the clamping member of the drug delivery device provided by the utility model being opened;

[0034] Figure 8 A schematic diagram of the structure of the drug delivery device for insertion into the body provided in Example 1 of the utility model;

[0035] Fig. 9 A schematic diagram of the structure of a drug delivery device for insertion into the body provided in Example 3 of the utility model;

[0036] Parts and numbers in the figure: 1. medicine releasing mechanism; 11. main body; 12. push-pull member; 2. hand-held mechanism; 21. bottleneck end; 211. port; 22. bottle end; 221. connecting hole; 3. catheter; 31. insertion end; 4. infusion valve; 41. first end; 42. second end; 43. infusion end; 431. movable protrusion; 32. first catheter; 33. second catheter; 5. engaging member; 51. engaging main body; 511. first through hole; 512. second through hole; 52. engaging portion; 521. engaging end; 522. engaging end; 523. engaging interface; 53. extruding portion; 531. first extruding portion; 532. second extruding portion; 61. infusion tube; 62. infusion bag; 63. liquid speed regulating member; 501. first engaging member; 502. second engaging member. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the various features in the embodiments and embodiments of the utility model can be combined with each other, all within the scope of protection of the utility model.

[0038] Rectal administration can avoid or reduce irritation to the gastrointestinal tract and has the advantages of high bioavailability and few side effects. However, due to the location of the medication application, patients with more introverted personalities may feel embarrassed and nervous when applying the medication. At the same time, the packaging of the medication itself makes it inconvenient to apply the medication and the medication is easy to flow out of the body. In addition, when applying the medication, the medication cannot be effectively treated because the length inserted into the body is not enough. For example, enema needs to be inserted into the body for 7-10 cm to achieve the effect of lubricating bowel movements. However, due to the design of the enema bottle itself and the patient's usage posture, the enema cannot be placed 7-10 cm into the body, affecting the lubrication effect.

[0039] Based on the above issues, please see Figure 1 , Figure 2 As shown, the embodiment of the utility model provides a drug delivery device inserted into the body, the drug delivery device comprising:

[0040] A medicine placing mechanism 1, used for containing medicine;

[0041] A catheter 3, connected to the drug delivery mechanism 1, and used to introduce the drug solution in the drug delivery mechanism 1 into the body;

[0042] The hand-held mechanism 2 is arranged at the insertion end 31 of the catheter 3 inserted into the body, and is used for holding and fixing the insertion end 31 of the catheter 3 .

[0043] Specifically, the drug is placed in the drug release mechanism 1, and then the drug release mechanism 1 is connected to one end of the catheter 3, and the drug is inserted into the body through the insertion end 31 of the catheter 3, so that easy in vivo drug administration is achieved.

[0044] The length of the catheter 3 can be freely selected according to the demand for drug administration, and the drug can be administered into the body without the patient having to assume an uncomfortable posture, which to a certain extent avoids the patient's emotional tension caused by the awkward medication position.

[0045] The setting of the drug dispensing mechanism 1 not only facilitates the medication for the patient, but also avoids the waste of the drug. For example, when the enema is used to lubricate the patient's anus for defecation, when the enema bottle is used to administer the drug to the patient directly, the enema is squeezed into the patient's anus by squeezing, and the enema in the bottle cannot be completely squeezed into the patient's body, which causes the waste of the drug and also reduces the lubrication effect. The utility model sets the drug dispensing mechanism 1 and sets the amount of the drug in the drug dispensing mechanism 1 according to the demand. When the drug is discharged into the body through the catheter 3 by the drug dispensing mechanism 1, the amount of the drug discharged can be accurately controlled, and the speed of drug discharge can be accurately controlled, so as to avoid the patient's discomfort caused by the drug being discharged too quickly.

[0046] When applying medicine to a patient, in order to avoid injury or relieve the patient's discomfort, the catheter 3 is made of a material with a certain degree of flexibility. At the same time, the catheter 3 should not be too large, which will affect the medical staff, the patient himself or the patient's family members when applying medicine to a certain extent, causing inconvenience. Therefore, the utility model provides a hand-held mechanism 2 at one end of the catheter 3 extending into the body, so as to facilitate the fixed control of the insertion end 31 of the catheter 3 extending into the body and the control of the extension length.

[0047] In one embodiment, if Figure 2 As shown, the drug delivery device further includes an infusion valve 4, and the infusion valve 4 is provided with a first end 41, a second end 42 and an infusion end 43;

[0048] The first end 41 is connected to the medicine releasing mechanism 1 through the first catheter 32, and the second end 42 is connected to the second catheter 33, and the other end of the second catheter 33 passes through the hand-held mechanism 2 and is inserted into the body;

[0049] A movable protrusion 431 is connected to one side of the infusion end 43 , and the movable protrusion 431 matches with the port of the infusion end 43 and is used to be inserted into the port of the infusion end 43 .

[0050] Specifically, the infusion valve 4 is arranged between the medicine releasing mechanism 1 and the hand-held mechanism 2, and the catheter 3 includes a first catheter 32 and a second catheter 33. The first catheter 32 is arranged between the medicine releasing mechanism 1 and the first end 41 of the infusion valve 4, and the two ends are respectively connected to the medicine releasing mechanism 1 and the infusion valve 4; one end of the second catheter 33 is connected to the second end 42 of the infusion valve 4, and the other end is the insertion end 31, which is used to extend into the body to apply medicine.

[0051] like Figure 3 As shown, the infusion end 43 of the infusion valve 4 is connected to the infusion bag 62 through the infusion tube 61, and is used to deliver the medicine in the infusion bag 62 into the patient's body. The infusion tube 61 is provided with a liquid speed regulating component 63, which is used to adjust the flow rate of the liquid in the infusion tube 61.

[0052] When infusion is not performed, the movable protrusion 431 is inserted into the port of the infusion end 43. When infusion is performed, the movable protrusion 431 is pulled out, the infusion tube 61 is connected to the infusion end 43, and the medicine is discharged into the second catheter 33 through the infusion end 43, and then delivered to the patient's body from the insertion end 31 of the second catheter 33.

[0053] In one embodiment, if Figure 3-Figure 7 As shown, the drug delivery device further comprises a snap-fitting member 5, and the snap-fitting member 5 comprises a snap-fitting body 51, a snap-fitting portion 52, and a pressing portion 53;

[0054] The two ends of the engaging body 51 are oppositely provided with a first through hole 511 and a second through hole 512 for the conduit 3 to pass through;

[0055] The clamping portion 52 includes a clamping end 521 and a clamping end 522, which are respectively disposed at two ends of the clamping body 51;

[0056] The extrusion portion 53 includes a first extrusion portion 531 and a second extrusion portion 532 . The first extrusion portion 531 is disposed between the first through hole 511 and the second through hole 512 of the engaging body 51 , and the second extrusion portion 532 is disposed at the engaging end 521 .

[0057] When the engaging end 521 and the connecting end 522 are engaged with each other, the first squeezing portion 531 and the second squeezing portion 532 squeeze the catheter 3 to close the flow of medicine in the catheter 3 .

[0058] Specifically, the clamping end 522 is provided with a clamping interface 523. When it is necessary to close the flow of medicine in the catheter 3, the user can press the clamping end 521 with his thumb and press it down in the direction of the clamping body 51, so that the first squeezing part 531 and the second squeezing part 532 are close to each other, and the catheter 3 is squeezed. At the same time, the clamping end 521 is against the clamping interface 523 of the clamping end 522 to complete the clamping of the clamping end 522 and the clamping end 521), so as to prevent the first squeezing part 531 and the second squeezing part 532 from moving away from each other.

[0059] When the flow of the catheter 3 needs to be opened, the user presses the clamping end 522 to make the clamping end 522 elastically change as a whole, so that the clamping interface 523 is separated from the clamping end 521, driving the first extrusion part 531 and the second extrusion part 532 to move away from each other, thereby releasing the catheter 3.

[0060] Preferably, the engaging end 521 gradually tapers from the end connected to the engaging body 51 to the end engaged with the card interface 523 , so as to facilitate the engagement between the engaging end 521 and the engaging end 522 .

[0061] In one embodiment, the engaging member 5 is integrated with the infusion valve 4 to close the flow of the catheter 3 .

[0062] Specifically, the installation of the drug delivery device can be simplified by integrating the engaging member with the infusion valve.

[0063] In one embodiment, if Figure 2 As shown, the medicine releasing mechanism 1 comprises a main body 11 and a push-pull member 12. The push-pull member 12 is disposed in the main body 11 and slides relative to the main body 11 to suck in or push out medicine.

[0064] Specifically, an interface of a specific length is provided at one end of the main body 11 for sucking the medicine and discharging the medicine from the main body 11 of the medicine dispensing mechanism 1 into the catheter 3 .

[0065] One end of the push-pull member 12 is arranged inside the main body 11, and the other end is arranged outside the main body 11. The end arranged inside the main body 11 is tightly fitted with the inner wall of the main body 11. When the push-pull member 12 and the main body 11 slide relative to each other, the medicine will not flow out of the medicine release mechanism 1.

[0066] Preferably, the end of the push-pull member 12 that is in close contact with the main body 11 is made of rubber material, so that the push-pull member 12 can be in close contact with the inner wall of the main body 11 and can slide freely without causing the drug to flow out.

[0067] Preferably, the drug dispensing mechanism 1 comprises a medical syringe.

[0068] In one embodiment, the drug delivery device is provided with a connecting tube, one end of which is connected to the catheter 3 , and the other end of which is connected to the drug delivery mechanism 1 .

[0069] Specifically, the drug release mechanism 1 is directly connected to the catheter 3, which may cause certain deformation of the interface of the drug release mechanism 1 or the access end of the catheter 3. When multiple drug administrations are required, the drug release mechanism 1 needs to be disassembled multiple times, resulting in severe deformation and drug flow to the outside.

[0070] A connecting tube is used to connect the medicine releasing mechanism 1 and the catheter 3, which prevents the medicine releasing mechanism 1 from being deformed and causing the medicine to flow out when it is disassembled multiple times, and also prevents the interface connection installation between the catheter 3 and the medicine releasing mechanism 1 from causing the user's hand flora to contaminate the interface and cause medicine contamination.

[0071] The therapeutic effect of the in vivo drug delivery device provided by the embodiment of the utility model on the patient is as follows:

[0072] Tang Moumou, female, 84 years old, married, with one son, was admitted to the hospital with her husband on January 11, 2022. She was in poor mental state, had thinking disorder, suffered from Alzheimer's disease, and had aggressive behavior when she was admitted to the hospital. T36.9℃, P60 times / min, R20 times / min, BP 92 / 62mmHg were measured. She is currently taking estazolam tablets, memantine hydrochloride tablets, quetiapine fumarate tablets, mirtazapine tablets, etc. The patient has difficulty swallowing, a gastric tube is placed, and she is often constipated. She needs to open the suppository and pour it into the anus to defecate, and artificial assistance is required when necessary.

[0073] In order to avoid drug waste while ensuring the treatment effect, the handheld mechanism is used to control the length of the catheter inserted into the body so that the drug solution can be fully absorbed to achieve spontaneous defecation.

[0074] During treatment, the medical staff absorbs the medicine with the drug release mechanism according to Tang's treatment needs, and then quickly assembles the drug release mechanism, the catheter, and the hand-held mechanism, controls the insertion end of the catheter to slowly extend into the patient's anus through the hand-held mechanism, and then uses the push-pull member to deliver the medicine in the main body 11 to the inside of the patient's anus through the catheter, smoothly helping Tang to defecate. The in-vivo drug delivery device provided by the utility model can conveniently and effectively deliver the medicine to the inside of the patient to help constipated patients defecate, and it has a simple structure, is easy to assemble and disassemble, and the catheter is made of silicone material, which will not cause damage to the patient's mucosa.

[0075] Example 1

[0076] The present invention provides a drug delivery device inserted into the body based on the drug delivery device provided by the above embodiment, such as Figure 8As shown, the hand-held mechanism 2 includes a bottleneck end 21 and a bottle body end 22, the catheter 3 penetrates from the bottom of the bottle body end 22 and exits from the port 211 of the bottleneck end 21, and the catheter 3 moves relative to the hand-held mechanism 2 to control the length of the catheter 3 inserted into the body.

[0077] Specifically, a connecting hole 221 is provided at the bottom of the bottle body end 22, and the connecting hole 221 is communicated with the port 211 of the bottleneck end 21. The catheter 3 passes through the bottom connecting hole 221 of the bottle body end 22 of the hand-held mechanism 2 and passes out from the port 211 of the bottleneck end 21. The length of the catheter 3 passing through the port 211 of the bottleneck end 21 is controlled by controlling the length of the catheter 3 extending into the body, thereby realizing the placement requirements of different drugs at different depths in the body. At the same time, the setting of the hand-held mechanism 2 has a fixing and holding effect on the insertion end 31 of the catheter 3 extending into the body, thereby preventing the catheter 3 from being unable to be inserted into the body due to its flexibility.

[0078] Preferably, the bottleneck end 21 is a tubular structure of a certain length, and the insertion end 31 includes the bottleneck end 21 of the tubular structure and the catheter 3. The bottleneck end 21 and the catheter 3 are inserted into the body together to achieve better control of the insertion of the catheter 3.

[0079] In this embodiment, a hand-held mechanism 2 is provided at the insertion end 31 of the catheter 3 extending into the body, which is convenient for fixing and controlling the insertion end 31 of the catheter 3 extending into the body when administering medicine to the patient, and accurately controlling the length of the catheter 3 extending into the body when administering medicine to the patient, thereby ensuring that the medicine does not flow out of the body due to the insertion end 31 extending into the body being too short, and also avoiding discomfort to the patient due to the insertion end 31 being too long.

[0080] Example 2

[0081] The utility model provides a drug delivery device inserted into the body based on the drug delivery device provided in the above embodiment. Fig. 9 As shown, the engaging member 5 includes a first engaging member 501 and a second engaging member 502 , wherein the first engaging member 501 is used to close the flow of the first conduit 32 , and the second engaging member 502 is used to close the flow of the second conduit 33 .

[0082] Specifically, the first engaging member 501 is arranged on the first conduit 32, and is used to control the circulation of the medicine in the medicine releasing mechanism 1 in the conduit 3. At the same time, when the medicine releasing mechanism 1 needs to add medicine multiple times and discharge medicine into the conduit 3 multiple times, the first engaging member 501 is first controlled to close the circulation of the first conduit 32 to prevent the medicine from flowing out and the air from entering.

[0083] When infusion is performed through the infusion valve 4 , the flow of the second conduit 33 can be closed by the second engaging member 502 disposed on the second conduit 33 .

[0084] In this embodiment, the first engaging member 501 and the second engaging member 502 are respectively provided on the first conduit 32 and the second conduit 33 to control the flow of drugs input from different directions.

[0085] Example 3

[0086] The present invention is based on the drug delivery device inserted into the body provided by the above-mentioned embodiment. As shown in the figure, this embodiment provides a drug delivery device inserted into the body. The infusion valve can be replaced by a three-way pipe. The three-way interface includes a first interface, a second interface, and a third interface. The first interface is connected to the drug release mechanism through a third catheter. The second interface is connected to one end of a fourth catheter. The other end of the fourth catheter passes through the handheld mechanism and extends into the body. The third interface is used for infusion through an infusion tube.

[0087] In one embodiment, the drug delivery device inserted into the body is provided with a third engaging member, a fourth engaging member, and a fifth engaging member. The third engaging member is arranged on the third catheter to close the connection between the drug release mechanism and the third catheter; the fourth engaging member is arranged on the fourth catheter to close the flow of the fourth catheter; the fifth engaging member is arranged on the third interface of the three-way pipe to control the flow of the third interface.

[0088] Example 4

[0089] As shown in the figure, this embodiment provides a device for drug delivery through insertion into the body, and the device includes the device for drug delivery through insertion into the body provided by any of the above embodiments.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A drug delivery device inserted into the body, characterized in that: The drug delivery device comprises: A medicine placing mechanism (1), used for placing medicine; A catheter (3) connected to the drug delivery mechanism (1) and used to introduce the drug solution in the drug delivery mechanism (1) into the body; A hand-held mechanism (2) is arranged at the insertion end (31) of the catheter (3) inserted into the body, and is used to hold and fix the insertion end (31) of the catheter (3). The hand-held mechanism (2) comprises a bottleneck end (21) and a bottle end (22). The catheter (3) penetrates from the bottom of the bottle end (22) and exits from a port (211) of the bottleneck end (21). The catheter (3) and the hand-held mechanism (2) move relative to each other, and are used to telescope and control the length of the catheter (3) inserted into the body.

2. The in vivo drug delivery device according to claim 1, characterized in that: The drug delivery device further comprises an infusion valve (4), wherein the infusion valve (4) is provided with a first end (41), a second end (42) and an infusion end (43); The first end (41) is connected to the drug releasing mechanism (1) via a first catheter (32), the second end (42) is connected to a second catheter (33), and the other end of the second catheter (33) passes through the hand-held mechanism (2) and is inserted into the body; One side of the infusion end (43) is connected to a movable protrusion (431), and the movable protrusion (431) matches the port of the infusion end (43) and is used to be inserted into the port of the infusion end (43).

3. The in vivo drug delivery device according to claim 2, characterized in that: The drug delivery device further comprises a snap-fitting member (5), wherein the snap-fitting member (5) comprises a snap-fitting body (51), a snap-fitting portion (52), and a pressing portion (53); Two through holes are arranged at opposite ends of the engaging body (51) for the conduit (3) to pass through; The clamping portion (52) comprises a clamping end (521) and a clamping end (522), which are respectively arranged at two ends of the clamping body (51); The extrusion portion (53) comprises a first extrusion portion (531) and a second extrusion portion (532); the first extrusion portion (531) is arranged between two through holes of the engaging body (51); and the second extrusion portion (532) is arranged at the engaging end (521).

4. The in vivo drug delivery device according to claim 3, characterized in that: The engaging member is integrated with the infusion valve to close the flow of the catheter.

5. The in vivo drug delivery device according to any one of claims 1 to 4, characterized in that: The drug delivery device is provided with a connecting tube, one end of which is connected to the catheter (3), and the other end of which is connected to the drug delivery mechanism (1).

6. The in vivo drug delivery device according to any one of claims 1 to 4, characterized in that: The medicine releasing mechanism (1) comprises a main body (11) and a push-pull member (12). The push-pull member (12) is arranged in the main body (11) and slides relative to the main body (11) to suck in or push out medicine.

7. The in vivo drug delivery device according to claim 3 or 4, characterized in that: The engaging member (5) comprises a first engaging member (501) and a second engaging member (502), wherein the first engaging member (501) is used to close the flow of the first conduit (32), and the second engaging member (502) is used to close the flow of the second conduit (33).

8. The in vivo drug delivery device according to claim 7, characterized in that: The infusion valve (4) can be replaced by a three-way pipe.

9. A device, characterized in that: The device comprises the in vivo drug delivery device according to any one of claims 1 to 8.

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