CN211434699U - Combined gynecological medicine feeder - Google Patents

Abstract

The utility model relates to medical appliances, in particular to a combined gynecological drug delivery device, which is composed of a drug tube assembly and a push injection assembly; the drug tube assembly comprises a sleeve and a piston, and the side walls of the sleeve are uniformly distributed with side holes, The rear end is provided with an external thread; the front side of the piston is fixed with a stud, and the rear side of the piston is provided with a blind hole; the inner side wall of the middle and front section of the casing is provided with a first partition, and the outer wall of the stud is provided with a second partition; Note that the assembly includes a threaded cap and a push rod; the front end of the threaded cap is provided with an internal thread, the threaded cap defines a sliding sleeve, and the rear end of the threaded cap is provided with a guide screw hole; the push rod passes through the guide screw hole, and its front is a guide The front end of the threaded part is provided with a plug; when the threaded cap is combined with the sleeve and the plug is inserted into the blind hole, if the sliding sleeve remains fixed and the tail shank moves forward in the axial direction, the threaded cap will drive the sleeve to rotate forward. The utility model has the advantages of reasonable structural design, convenient and quick use, and can be administered in a rotary manner, thereby increasing the contact area between the drug and the affected part, improving the efficiency of the drug, and having broad prospects for promotion.

Description

Combined gynecological drug delivery device

technical field

The utility model relates to a medical product, in particular to a drug delivery device used in the treatment of gynecological diseases.

Background technique

In clinical practice, placing external medicines in the vagina is an important treatment method for various gynecological diseases, especially vaginitis. It is easy to operate, acts directly on the affected area and has quick effects, and is accepted by the majority of patients. At present, the most commonly used gynecological external medicines In the form of a gel, it is placed in the vagina of the patient with the aid of a drug delivery device. The existing drug delivery device usually uses a piston to discharge the drug from the front end. Due to the unreasonable structural design and the dual limitations of the physiological characteristics of the affected area, the gel cannot be evenly distributed on the vaginal wall when it is placed in the patient's vagina. , but remain in the form of a mass for a long time, the contact area with the affected area is extremely limited, and it cannot be dissolved and absorbed quickly. At the same time, because the patient's medication is mostly concentrated during sleep, the body is in a static state, and the gel is only distributed on one side of the vagina after being dissolved. This factor further causes the gel to not fully contact the affected area, reducing gynecological diseases. treatment effect. In the prior art, there are also many technical solutions that use the method of opening side holes in the side wall of the sleeve so that the medicine can be discharged from the surrounding of the sleeve. Although this structure can theoretically improve the discharge of medicine at the front end of the traditional medicine dispenser However, during the entire bolus injection process, it cannot guarantee the full discharge of each side hole, and the medicine discharged through the side hole cannot be uniformly coated on the patient site, and the effect in actual clinical application is not significant. Therefore, it has not been widely used.

Utility model content

In order to overcome the above-mentioned technical problems, the utility model provides a method that can evenly discharge the medicament, and make the medicament tend to be evenly coated on the vaginal wall by rotating, thereby increasing the contact area between the medicament and the affected part, which can significantly improve the absorption of the medicament. Efficiency, combined gynecological applicator for improved therapeutic effect.

For realizing the above-mentioned technical purpose, the utility model adopts the following technical scheme:

A combined gynecological drug delivery device is composed of a drug tube assembly and a bolus injection assembly; the drug tube assembly includes a sleeve and a piston located in the sleeve, characterized in that: the front end of the sleeve is closed, and the middle and front sections are closed. The side walls are evenly distributed with a number of side holes, and the rear end is provided with an external thread; the front side of the piston is fixed with a stud, an annular cavity is formed between the outer wall of the stud and the inner wall of the casing, and a non-circular cavity is formed on the rear side of the piston. Blind hole; the inner side wall of the middle and front section of the casing is provided with a first partition extending forward and backward and the inner end is in contact with the outer wall of the stud, and the outer wall of the stud is provided with a first partition extending forward and backward and the outer end is in contact with the inner wall of the casing Two separators; the front area of the piston in the inner cavity of the casing is filled with gel, and the outer side of the casing is covered with a plastic film covering the side holes; when the front end of the stud and the front end of the casing are abutted, the piston and the first diaphragm The rear end of the valve is in contact with each other. At this time, the first partition plate and the second partition plate separate the annular cavity in the axial direction, and the side holes are located on the front side of the piston; in the initial state of the drug tube assembly, the first partition plate The rear end part of the plate is in contact with the front end part of the second partition plate, so that the sleeve can only be rotated forward and the maximum rotation angle is α when the position of the stud is fixed; the bolus assembly includes a threaded cap and a push rod The front end of the threaded cap is provided with an internal thread and can be combined with the casing. The threaded cap defines a sliding sleeve that can only rotate relative to it. The sliding sleeve is fixed with an outwardly extending finger handle, and the center of the rear end of the threaded cap is along the axis. A guide screw hole is opened in the direction; the push rod passes through the guide screw hole, the front part is a guide screw part that can be threadedly matched with the guide screw hole, and the rear part is a polished rod part that can be rotated and matched with the guide screw hole. The front end of the rod is provided with a plug for insertion and combination with the blind hole, and the rear end of the push rod is fixed with a tail handle; when the guide threaded part passes through the guide screw hole as a whole, the relative rotation angle of the push rod and the threaded cap is β, β=α; when After the threaded cap and the casing thread are firmly combined and the plug is inserted into the blind hole, if the sliding sleeve remains fixed and the tail shank moves forward in the axial direction, the threaded cap will drive the casing to rotate forward. When the stud is at the front end , the polished rod part is matched with the guide screw hole.

The working principle and usage of this combined gynecological drug delivery device are as follows:

When in use, hold the sleeve and the threaded cap, so that the two are firmly connected by thread, and push the tail handle slightly forward to insert the plug into the blind hole, that is, the combination of the drug tube assembly and the bolus assembly is completed; The covering plastic film is peeled off, and the cannula is inserted into the patient's vagina by holding the bolus assembly; holding the sliding sleeve to push the tail handle forward and avoid the rotation of the tail handle. It cannot move forward, the piston will move forward in the casing to drive the gel to be discharged through the side hole. Rotation, under the cooperation of the guide thread and the guide screw hole, the threaded cap will drive the casing to rotate in the forward direction, and the rotation angle tends to be one circle, so as to realize the rotary drug delivery, and make the discharged gel more evenly spread and smeared. on the vaginal wall; when the tail handle cannot be pushed forward, it means that the stud has reached the frontmost position. At this time, only the gel remains in the annular cavity, and the polished rod part of the push rod cooperates with the screw hole so that the The push rod and the nut can rotate relative to each other; after that, hold the threaded cap to rotate the tail handle in one direction until it cannot rotate, so that the first partition rotates to one side of the second partition, and then rotate the tail handle in the other direction until it cannot rotate. The first partition is rotated to the other side of the second partition, thereby completely expelling the gel in the annular cavity, and finally the drug tube assembly is withdrawn from the patient's body, that is, the entire administration operation is completed.

Compared with the prior art, the utility model has the following technical effects:

During the administration process, all the side holes will continuously discharge the gel, and the cannula can be rotated in a circle during the administration process, so that the discharged gel is more evenly spread and applied to the vagina On the wall, the contact area between the gel and the affected area is increased, which is more conducive to the direct effect of the drug on the affected area and rapid absorption and utilization; at the same time, because the gel is discharged through a plurality of evenly distributed side holes, the discharged gel is The flocculent shape is more conducive to dissolution than the previous mass, thereby improving the drug absorption efficiency; since the function of the drug tube assembly is to package the gel and release the gel into the patient, it should be a one-time use Processing is required, and the bolus assembly is used to provide the drug tube assembly with the power required to release the gel and the rotation of the cannula, which is not in contact with the patient, so it can be recycled, that is, a bolus assembly can be used with multiple The medicine tube assembly can be used cyclically. The length of the disposable medicine tube assembly can be shortened correspondingly because there is no need to set a piston rod and no holding part. Although the overall structure of the combined gynecological drug delivery device is complex, the average cost per use is not higher or even lower than the existing disposable drug delivery device. When in use, combine the drug tube assembly with the bolus component, place the drug tube assembly in the patient's vagina, hold the sliding sleeve and push the tail handle forward to achieve rotary drug delivery, and finally hold the threaded cap to rotate the tail The handle can completely discharge the gel in the casing, the operation is convenient and quick, and the residue of the medicine in the casing is small. In addition, since the bolus component only needs to be operated during the administration process, the bolus component can be designed based on the shape that is easy to hold and grasp. Compared with the previous disposable applicator, this combined gynecological administration The device is easier to operate manually. To sum up, the combined gynecological drug delivery device has a reasonable structure design, is convenient and quick to use, can be administered in a rotary manner, increases the contact area between the drug and the affected area, improves the efficiency of the drug, and has broad prospects for promotion.

Description of drawings

Figure 1 is a schematic diagram of the structure of the drug tube assembly.

Figure 2 is a schematic diagram of the exploded structure of the drug tube assembly.

FIG. 3 is a schematic cross-sectional view of the drug tube assembly when the stud is located at the foremost end.

FIG. 4 is a cross-sectional view of A-A in FIG. 3 .

FIG. 5 is one of the structural schematic diagrams of the bolus assembly.

FIG. 6 is the second schematic diagram of the structure of the bolus assembly.

FIG. 7 is one of the schematic diagrams of the combined structure of the drug tube assembly and the bolus injection assembly.

FIG. 8 is the second schematic diagram of the combined structure of the drug tube assembly and the bolus component.

9 is a cross-sectional view of the combination of the drug tube assembly and the bolus assembly.

Figure 10 is a schematic diagram of holding the sliding sleeve and pushing the tail handle forward to achieve rotary drug delivery.

Fig. 11 is a schematic diagram of rotating the tail handle with a threaded cap to completely discharge the gel in the annular cavity.

In the figure, 1, side hole, 2, first partition, 3, second partition, 4, stud, 5, casing, 6, external thread, 7, blind hole, 8, piston, 9, annular space Cavity, 10, Tail handle, 11, Polished stem, 12, Pilot thread, 13, Finger handle, 14, Sliding sleeve, 15, Internal thread, 16, Plug, 17, Threaded cap, 18, Pilot screw hole, 19, putter.

Detailed ways

Referring to Figures 1, 5 and 7, a combined gynecological drug delivery device disclosed in this embodiment is composed of a drug tube assembly and a bolus injection assembly;

1-4, the drug tube assembly includes a sleeve 5, a piston 8 located in the sleeve 5 and sealingly matched with the sleeve 5; the sleeve 5 has a closed front end and an open rear end, The side wall of the front section is evenly distributed with a number of side holes 1 that communicate the inner cavity with the outside world, and the outer wall of the rear end is provided with an external thread 6; The diameter is small, so that an annular cavity 9 is formed between the outer wall of the stud 4 and the inner wall of the casing 5, and a non-circular blind hole 7 is provided on the rear side of the piston 8; The first partition 2 extending back and forth and the inner end is in contact with the outer wall of the stud 4, the outer wall of the stud 4 is provided with a second partition 3 extending forward and backward and the outer end is in contact with the inner wall of the casing 5; The front area of the piston 8 of the cavity is filled with gel, and the outer side of the sleeve 5 is covered with a plastic film (not shown) covering the side hole 1, and the plastic film is used to prevent the leakage of the gel in the sleeve 5; when When the front end of the stud 4 abuts against the front end of the sleeve 5, the piston 8 just touches the rear end of the first diaphragm 2. At this time, the first diaphragm 2 and the second diaphragm 3 move the annular cavity 9 in the axial direction respectively. At this time, all the side holes 1 are located on the front side of the piston 8; in the initial state of the drug tube assembly, the rear end of the first separator 2 is in contact with the front end of the second separator 3, so that the sleeve When the position of the stud 4 is fixed, the pipe 5 can only be rotated in the forward direction, and the maximum rotation angle (the first baffle 2 is rotated from one side of the second baffle 3 to the other side of the second baffle 3) is set as α;

5 , 6 and 9 , the bolus assembly includes a threaded cap 17 and a push rod 19 ; the front end of the threaded cap 17 is provided with an internal thread 15 and can be combined with the external thread 6 at the tail end of the sleeve 5 . , the threaded cap 17 defines a sliding sleeve 14 that can only rotate relative to it, the sliding sleeve 14 is fixed with an outwardly extending finger handle 13, and a guide screw hole 18 is axially opened at the center of the rear end of the threaded cap 17; The push rod 19 passes through the guide screw hole 18. The front part of the push rod 19 is the guide screw part 12 that can be threadedly matched with the guide screw hole 18, and the rear part is the polished rod part 11 that can be rotatably matched with the guide screw hole 18. The front end of the rod 19 is provided with a plug 16 for insertion and combination with the blind hole 7, and the rear end of the push rod 19 is fixed with a tail handle 10; when the guide threaded portion 12 passes through the guide screw hole 18 as a whole, the push rod 19 is opposite to the threaded cap 17. The rotation angle is β, then β=α; when the threaded cap 17 and the sleeve 5 are firmly combined and the plug 16 at the front end of the push rod 19 is inserted and combined with the blind hole 7 on the rear side of the piston 8, if the sliding sleeve 14 remains fixed and When the tail handle 10 moves forward in the axial direction, the threaded cap 17 will drive the sleeve 5 to rotate in the forward direction. When the stud 4 is at the front end, the polished rod portion 11 cooperates with the guide screw hole 18, that is, the push rod 19 and the threaded cap 17 can be connected. relative rotation.

The working principle of this combined gynecological drug delivery device is:

Referring to Figures 1, 5, 7, 8, and 9, when in use, hold the sleeve 5 and the threaded cap 17, connect the two firmly by screwing, and push the tail handle 10 forward slightly to insert the plug 16 into the blind hole 7. , that is, to complete the combination of the drug tube assembly and the bolus assembly; tear off the plastic film covered on the sleeve 5, and hold the bolus assembly to insert the sleeve 5 into the patient's vagina; as shown in Figure 10, hold the sliding sleeve 14 Push the tail handle 10 forward and prevent the tail handle 10 from rotating. On the one hand, since the axial position of the sleeve 5 is limited by the sliding sleeve 14 and the threaded cap 17 and cannot move forward, the piston 8 will move forward in the sleeve 5 The gel is driven to be discharged through the side hole 1. On the other hand, the rotation of the tail handle 10 is restricted due to artificial force, that is, the push rod 19, the piston 8 and the stud 4 will not rotate. With the cooperation of the threaded cap 17, the sleeve 5 will be rotated forward, and the rotation angle tends to be one circle, so as to realize the rotary drug delivery, so that the discharged gel is more evenly spread and applied on the vaginal wall; As shown in 11, when the tail handle 10 cannot continue to advance forward, it means that the stud 4 has reached the frontmost position. At this time, only the gel is left in the annular cavity 9, and the polished rod portion 11 of the push rod 19 is connected to the screw. The holes are matched so that the push rod 19 and the nut can rotate relative to each other; after that, hold the threaded cap 17 to rotate the tail handle 10 in one direction until it cannot rotate, so that the first partition 2 is rotated to one side of the second partition 3, and then to the other side. Rotate the tail handle 10 in one direction until it cannot be rotated, so that the first partition plate 2 is rotated to the other side of the second partition plate 3, thereby completely discharging the gel in the annular cavity 9, and finally removing the drug tube assembly from the When the patient is withdrawn from the body, the entire drug delivery operation is completed; the drug tube assembly and the bolus component are separated, the drug tube assembly is treated as medical waste, and the bolus component is cleaned and sterilized for next use.

Referring to Figures 7 and 8, in the above-mentioned combined gynecological drug delivery device, since the function of the drug tube assembly is to pack the gel and release the gel into the patient's body, it should be carried out with a single-use requirement. Processing, and the bolus injection assembly is used for manual hand-held operation to provide the drug tube assembly with the power and support required for drug delivery, without contacting the patient, so it can be recycled. In clinical applications, a bolus injection assembly should be used with more than one. A drug tube assembly is recycled.

Referring to Figure 10, in the clinical application of the combined gynecological applicator, all the side holes 1 will continue to discharge the gel during the drug administration process, and the sleeve 5 can be rotated to make the discharged gel. The agent is more evenly spread and smeared on the vaginal wall, which increases the contact area between the gel and the affected area, which is more conducive to the direct effect of the drug on the affected area and rapid absorption and utilization; The side hole 1 is discharged, and the discharged gel is in a flocculent shape, which is more conducive to dissolution than the previous mass, thereby improving the drug absorption efficiency.

Referring to Fig. 1, in this combined gynecological drug delivery device, because the disposable drug tube assembly does not need to be provided with a separate piston rod, the structure is simpler, and the length can be correspondingly shortened without the need to provide a gripping part, which is more than the existing one. The disposable drug delivery device is easier to manufacture and the cost is lower, so that although the overall structure of the combined gynecological drug delivery device is complex, the average cost per use is not higher or even lower than the existing disposable drug delivery device.

Referring to Figures 9, 10, and 11, when the combined gynecological applicator is in use, the drug tube assembly and the bolus injection assembly are combined, and the drug tube assembly is placed in the patient's vagina, and the sliding sleeve 14 is held to the patient's vagina. Rotary drug delivery can be realized by pushing the tail handle 10 in front, and finally the gel in the sleeve 5 can be completely discharged by rotating the tail handle 10 by holding the threaded cap 17, the operation is convenient and fast, and the residual medicine in the sleeve 5 is small; in addition, Since the bolus component only needs to be operated during the administration process, the bolus component can be designed based on the shape that is easy to hold and grasp. Easy to operate manually.

Referring to Figures 3 and 4, in the foregoing description, the rotation of the sleeve 5 is referred to as "forward rotation", and the so-called "forward rotation" is only for the convenience of structural elaboration to set the direction of rotation; When the drug tube assembly is in the initial state, the rear end of the first separator 2 is in contact with the front end of the second separator 3, so that the sleeve 5 can only be rotated in the direction a when the position of the stud 4 is fixed. The rotation of the sleeve 5 in the direction a is defined as "positive rotation"; since the relative position of the first partition 2 and the second partition 3 has two options when implementing the combined gynecological drug delivery device, so "Forward rotation" in different embodiments does not necessarily correspond to the actual rotation direction.

Referring to Figures 9 and 10, in this combined gynecological drug delivery device, "after combining the sleeve 5 with the threaded cap 17, slightly pushing the tail handle 10 forward can make the plug 16 just insert into the blind hole 7". The technical requirements are that in the process of manufacturing the combined gynecological drug delivery device, the size and matching relationship of each component should be debugged, so that after the sleeve 5 and the threaded cap 17 are combined, the push rod 19 can just make the plug 16 move forward during the forward movement. By inserting it into the blind hole 7, the aforementioned technical requirements can be achieved.

Referring to Figures 10 and 11, during the drug delivery process of the combined gynecological drug delivery device, the relative rotation angle of the push rod 19 and the threaded cap 17 is β when the guide threaded portion 12 passes through the guide screw hole 18 as a whole. The rotation angle of the sleeve 5 should also be β, and β=α, that is, the first partition 2 rotates from one side of the second partition 3 to the other side of the second partition 3 during the rotation of the sleeve 5. It can be seen that During the administration process, the rotation angle of the cannula 5 tends to be one circle, which can ensure that the gel is evenly discharged and spread on the affected area and smeared through the rotating cannula 5, and will not cause damage to the affected area, and the patient will not Not feeling well. In addition, since the relative rotation angle between the push rod 19 and the threaded cap 17 is β when the guide threaded portion 12 passes through the guide screw hole 18 as a whole, the pitch of the guide threaded portion 12 is bound to be relatively large, and the tail handle 10 is pushed to drive the push rod 19 during the drug delivery process. Moving forward is effortless.

Referring to FIG. 10 , during the drug delivery process of the combined gynecological drug delivery device, it is necessary to avoid the rotation of the tail handle 10 during the process of pushing the tail handle 10 forward by the sliding sleeve 14, so that the rotation of the sleeve 5 can be driven. For technical purposes, generally speaking, in the process of pushing the tail handle 10, the friction between the user's hand and the tail handle 10 can prevent the tail handle 10 from rotating. The friction between the tail handle 10 and the hand prevents the tail handle 10 from rotating during the process of pushing the tail handle 10 .

Referring to Figure 10, in the implementation process of the combined gynecological drug delivery device, after the sleeve 5 and the threaded cap 17 are threadedly connected, the connection between the two should be ensured to prevent the two from opposing during the drug delivery process. Rotation, the expected effect of rotary drug delivery technology cannot be achieved.

Claims (2)

1. A combined gynecological medicine feeder comprises a medicine tube assembly and a push injection assembly; the cartridge assembly includes the sleeve pipe, is located the intraductal piston of sleeve, its characterized in that: the front end of the sleeve is closed, side holes are uniformly distributed in the side wall of the middle front section, and external threads are arranged at the rear end of the sleeve; a stud is fixed on the front side of the piston, an annular cavity is formed between the outer wall of the stud and the inner wall of the sleeve, and a non-circular blind hole is formed in the rear side of the piston; a first partition plate which extends forwards and backwards and of which the inner side end is in contact with the outer wall of the stud is arranged on the inner side wall of the front section in the sleeve, and a second partition plate which extends forwards and backwards and of which the outer side end is in contact with the inner wall of the sleeve is arranged on the outer wall of the stud; gel is filled in the front area of the piston in the inner cavity of the sleeve, and a plastic film for covering the side hole is coated outside the sleeve; when the front end of the stud is abutted against the front end of the sleeve, the piston is just contacted with the rear end of the first partition plate, at the moment, the first partition plate and the second partition plate respectively partition the annular cavity along the axial direction, and meanwhile, the side holes are all positioned on the front side of the piston; when the cartridge assembly is in an initial state, the rear end part of the first partition plate is attached to the front end part of the second partition plate, so that the sleeve can only rotate in the forward direction under the condition that the position of the stud is fixed, and the maximum rotation angle is alpha; the push injection assembly comprises a threaded cap and a push rod; the front end of the threaded cap is provided with internal threads which can be combined and connected with the sleeve, the threaded cap is limited with a sliding sleeve which can only rotate relative to the threaded cap, a finger handle which extends outwards is fixed on the sliding sleeve, and the center of a circle at the rear end of the threaded cap is provided with a guide screw hole along the axial direction; the push rod penetrates through the guide screw hole, the front part of the push rod is provided with a guide screw thread part which can be in threaded fit with the guide screw hole, the rear part of the push rod is provided with a polished rod part which can be in rotating fit with the guide screw hole, the front end of the push rod is provided with a plug which is used for being spliced and combined with the blind hole, and the rear end of the push rod is fixedly provided with a tail handle; when the whole guide thread part passes through the guide screw hole, the relative rotation angle between the push rod and the thread cap is beta, wherein beta is alpha; when the threaded cap is firmly combined with the casing thread and the plug is inserted into the blind hole, if the sliding sleeve is kept fixed and the tail handle moves forwards along the axial direction, the threaded cap drives the casing to rotate forwards, and when the stud is positioned at the foremost end, the polished rod part is matched with the guide screw hole.

2. The modular gynecological applicator according to claim 1, characterized in that: the drug tube assembly is processed by adopting the requirement of disposable use, and the injection component can be recycled.

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