CN215505089U - Medicine injection device - Google Patents

Abstract

The utility model relates to the field of medical instruments, in particular to a medicine injection device. The existing pancreatic cancer chemotherapy is invasive intervention, and has short drug retention time, low concentration and poor effect. The utility model provides a medicine injection device, which comprises an intervention conduit internally provided with a first pipeline, a second pipeline and a medicine liquid pipeline, wherein the front end of the intervention conduit is closed, a second expansion ring and a first expansion ring which can bulge out are respectively arranged on the surface of the intervention conduit from the closed end to the back along the length direction of the intervention conduit, the rear ends of the first pipeline and the second pipeline extend out of the rear end of the intervention conduit, the front end of the first pipeline is communicated with the first expansion ring through a first opening on the surface of the intervention conduit, the front end of the second pipeline is communicated with the second expansion ring through a second opening on the surface of the intervention conduit, the rear end of the medicine liquid pipeline extends out of the intervention conduit, and the front end of the medicine liquid pipeline is communicated with a medicine outlet hole arranged on the surface of the intervention conduit. The utility model enters pancreas through the natural cavity of human body, and has little damage to human body; the medicine has long retention time in the pathological tissue, high concentration and good effect.

Description

Medicine injection device

Technical Field

The utility model relates to the field of medical instruments, in particular to a medicine injection device.

Background

The pancreatic cancer has short course of disease, fast progress and high fatality rate, and the current commonly used treatment method is chemotherapy, wherein the regional chemotherapy method is to selectively insert a catheter into a supply vessel of a target organ and inject chemotherapy drugs, so that the drug concentration in pancreatic tissues can be obviously improved, the toxic and side effects of the chemotherapy drugs on other important organs of the whole body can be reduced, and meanwhile, the tumor cells in a portal vein system can be effectively killed through secondary perfusion of portal vein reflux, and the occurrence of liver metastasis is reduced. However, when the existing regional chemotherapy is used, an invasive channel needs to be established to place a medicine injection tube to deliver medicine liquid required by the chemotherapy; the liquid medicine can be rapidly diffused from the injection position to the periphery, and the medicine retention time of the corresponding pathological change part in the pancreatic tissue is short and the concentration is low.

SUMMERY OF THE UTILITY MODEL

The utility model provides a drug injection device, aiming at the problems that the existing regional chemotherapy for pancreatic cancer has invasive intervention, the residence time of the drug in the pancreatic tissue of a lesion part is short, the concentration is low and the like, the injection device can enter the pancreatic part through the natural orifice of a human body, and the injury to the body in the entering process is small; and the retention time of the medicine at the position of the pathological tissue can be prolonged, the local medicine concentration is improved, and the treatment effect is improved. In addition, the utility model is also suitable for other chemotherapy treatments such as bile duct cancer and the like which can be intervened by the natural cavity of the human body.

The technical scheme adopted by the utility model for solving the technical problem is as follows: a medicine injection device comprises an intervention conduit, and is characterized in that the front end of the intervention conduit is closed, a first pipeline, a second pipeline and a liquid medicine pipeline are arranged in the intervention conduit, a second expansion ring and a first expansion ring which can bulge out of the surface of the intervention conduit are respectively arranged on the intervention conduit from the closed end to the back along the length direction of the intervention conduit, the first expansion ring and the second expansion ring are closed annular tubes which surround and are attached to the surface of the intervention conduit, the rear ends of the first pipeline and the second pipeline extend out of the rear end of the interventional catheter, the front end of the first pipeline is communicated with the first expansion ring through a first opening on the surface of the interventional catheter, the front end of the second pipeline is communicated with the second expansion ring through a second opening on the surface of the interventional catheter, the rear end of the liquid medicine pipeline extends out of the interventional catheter, the front end of the liquid medicine pipeline is communicated with a medicine outlet hole formed in the surface of the interventional catheter, and the medicine outlet hole is formed in the surface of the interventional catheter between the first expanding ring and the second expanding ring. The utility model closes the pancreatic duct by a local section through an interventional catheter and two expanding rings arranged on the interventional catheter, so that the pancreatic duct passage where the pathological change tissue is located is contained in the closed section, and then the pathological change tissue is subjected to high-concentration chemotherapy, thereby improving the treatment effect on the pathological change tissue. When the device works, the interventional catheter can enter the pancreatic duct by the guidance of a clinical enteroscope, and the entering process has little or no damage to the body; then, physiological saline is injected into the first swelling ring and the second swelling ring through the catheter, the two swelling rings swell to seal the corresponding pancreatic duct sections, the pancreatic duct passage where the lesion tissue is located is limited between the two swelling rings, then the chemotherapy drugs are injected into the drug liquid pipeline and flow out from the drug outlet hole between the two swelling rings, the drug liquid can stay in the pancreatic duct area blocked by the two swelling rings for a long time, the local drug liquid concentration is increased, the drug liquid reversely permeates into the pancreatic lesion tissue in the area by utilizing the pancreatic duct self lumen, the effect of in-situ accurate injection of the chemotherapy drugs is achieved, the drug liquid cannot flow and diffuse around the blood vessel after being injected into the blood vessel like the conventional blood vessel injection, so that the time of staying the lesion tissue is shortened, and the local drug liquid concentration is reduced. In addition, the effect of the two enlarged rings inflating to plug the pancreatic duct can be monitored by the usual imaging means used in interventional procedures.

As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures: the interventional catheter is also internally provided with a drainage pipeline, the front end of the drainage pipeline is communicated with a drainage inlet hole formed in the surface of the closed end of the interventional catheter, the rear end of the drainage pipeline is communicated with a drainage outlet hole formed in the surface of the interventional catheter, the drainage outlet hole is positioned on one side of the first expansion ring, and the first expansion ring is positioned between the drainage outlet hole and the medicine outlet hole. The drainage pipeline is used for draining redundant pancreatic juice in the pancreatic duct on one side of the second expansion ring to the pancreatic duct at the front end on one side of the second expansion ring, so that the pancreatic juice flows into duodenum, and the pancreatic juice is prevented from accumulating in the pancreatic duct on one side of the second expansion ring to cause acute pancreatitis.

The rear ends of the first pipeline, the second pipeline and the liquid medicine pipeline are respectively connected with a first joint, a second joint and a dosing joint. The joints are used for conveniently injecting normal saline into the first pipeline and the second pipeline and injecting chemotherapy liquid into the liquid medicine pipeline, and various joints which are commonly used in the existing interventional operation treatment and are convenient for connecting a syringe for injection can be adopted.

The first and second openings are each a plurality of and each disposed about a surface of the interventional catheter. A plurality of openings are arranged around the surface of the interventional catheter, so that the expansion and swelling speed of the first expansion ring and the second expansion ring is improved, and the first pipeline and the second pipeline respectively need a plurality of corresponding openings communicated with the corresponding branches.

The second pipeline is communicated with the first pipeline. When the two pipelines are communicated, only one pipeline is injected with physiological saline, the first expansion ring and the second expansion ring can be expanded and swollen at one time; under the condition that the two pipelines are mutually independent, the first expansion ring and the second expansion ring can respectively inject physiological saline to swell, so that doctors can conveniently and orderly select the pancreatic duct closed area step by step according to the actual condition of patients.

The medicine outlet holes are multiple and distributed along the length direction of the interventional catheter. The plurality of medicine outlet holes can accelerate the speed of injecting the chemotherapy liquid medicine into the closed pancreatic duct area, and at the moment, one end of the medicine liquid pipeline also needs to be provided with a plurality of branches to be communicated with the medicine outlet holes one by one.

The utility model can enter the pancreas part through the natural cavity of the human body, and the entering process has little damage to the body; the two expansion rings are used for swelling to form a section of closed pancreatic pipe section, in-situ accurate injection treatment is carried out on the pathological change tissue in the pancreatic pipe section, the retention time of the medicine at the position of the pathological change tissue is prolonged, the local medicine concentration is improved, and the treatment effect is improved.

Drawings

FIG. 1: the utility model has a schematic structure.

FIG. 2: the cross-sectional view taken along line A-A of FIG. 1.

FIG. 3: the rear end of the interventional catheter is schematic.

In the figure: 1. the medicine injection device comprises an interventional catheter, 2 parts of a first expansion ring, 3 parts of a second expansion ring, 4 parts of a drainage hole, 5 parts of a first opening, 6 parts of a medicine outlet, 7 parts of a second opening, 8 parts of a drainage hole, 9 parts of a first pipeline, 10 parts of a drainage pipeline, 11 parts of a second pipeline, 12 parts of a medicine liquid pipeline, 13 parts of a first joint, 14 parts of a second joint, 15 parts of a medicine feeding joint and 16 parts of a pancreatic duct.

Detailed Description

The utility model is further described with reference to the following description and embodiments in conjunction with the accompanying drawings.

As shown in fig. 1 to 3, a drug injection device comprises an interventional catheter 1, the front end of the interventional catheter 1 is closed, a first pipeline 9, a second pipeline 11 and a drug liquid pipeline 12 are arranged in the interventional catheter 1, a second expansion ring 3 and a first expansion ring 2 which can bulge out of the surface of the interventional catheter 1 are respectively arranged on the surface of the interventional catheter 1 from the closed end to the back along the length direction of the interventional catheter 1, and the two expansion rings are closed ring tubes which surround and are attached to the surface of the interventional catheter 1; the rear ends of the first pipeline 9 and the second pipeline 11 extend out of the rear end of the interventional catheter 1, the front end of the first pipeline 9 is communicated with the first expanding ring 2 through a first opening 5 on the surface of the interventional catheter 1, the front end of the second pipeline 11 is communicated with the second expanding ring 3 through a second opening 7 on the surface of the interventional catheter 1, the rear end of the liquid medicine pipeline 12 extends out of the interventional catheter 1, the front end of the liquid medicine pipeline 12 is communicated with a liquid medicine outlet 6 formed in the surface of the interventional catheter 1, the liquid medicine outlet 6 is provided with six liquid medicine outlets and distributed along the length direction of the interventional catheter 1, and all six liquid medicine outlets 6 are positioned in the surface area of the interventional catheter 1 between the first expanding ring 2 and the second expanding ring 3; further, a drainage pipeline 10 is further arranged in the interventional catheter 1, the front end of the drainage pipeline 10 is communicated with a drainage inlet hole 8 formed in the surface of the closed end of the interventional catheter 1, the rear end of the drainage pipeline 10 is communicated with a drainage outlet hole 4 formed in the surface of the interventional catheter 1, the drainage outlet hole 4 is located on one side of the first expansion ring 2, and the first expansion ring 2 is located between the drainage outlet hole 4 and the medicine outlet hole 6; in order to conveniently inject the physiological saline and the chemotherapy liquid, the rear ends of the first pipeline 9, the second pipeline 11 and the liquid medicine pipeline 12 are respectively connected with a first joint 13, a second joint 14 and a medicine feeding joint 15, the three pipelines can respectively carry out liquid injection operation through the joints, and the joints can be commonly used in the existing interventional operation treatment and are convenient for being connected with a needle cylinder for injection; the first openings 5 are three and are arranged around the surface of the interventional catheter 1 and the second openings 7 are three and are arranged around the surface of the interventional catheter 1. In addition, the second pipeline 11 and the first pipeline 9 can be two mutually independent pipelines or communicated, when the two pipelines are communicated, only physiological saline needs to be input into one of the pipelines at the rear end of the interventional catheter, the two expansion rings can be simultaneously expanded, the two sides of the chemotherapy position are blocked in the pancreatic duct, and a section of relatively closed chemotherapy medicine injection area is formed in the pancreatic duct.

When the device works, the interventional catheter 1 is guided to the duodenal papilla through the existing clinical enteroscope, the interventional catheter 1 is inserted into the pancreatic duct 16 and pushed to the lesion tissue area needing to be injected and then stopped; connecting an injector filled with physiological saline with a first joint 13, pushing the physiological saline to a first swelling ring 2 to swell and seal a pancreatic duct, then connecting the injector filled with the physiological saline with a second joint 14, pushing the physiological saline to a second swelling ring 3, swelling and sealing the pancreatic duct by the second swelling ring 3, sealing the two swelling rings to form a section of sealed pancreatic duct section, containing a pancreatic duct passage where a lesion tissue is located, injecting a chemotherapeutic drug into a drug liquid pipeline 12 through a drug administration joint 15, discharging the drug liquid into pancreas of the sealed area through a drug outlet 6, and reversely permeating the drug liquid into the pancreatic lesion tissue of the sealed area by utilizing a lumen of the pancreatic duct, so that the effect of accurately injecting the drug in situ is realized; meanwhile, the redundant pancreatic juice can flow in from the drainage inlet hole 8 at the closed end of the interventional catheter 1, flow out through the drainage pipeline 10 and the drainage outlet hole 4 and then are discharged into the pancreatic duct at the front end of one side of the second expansion ring 2, and finally flow into the duodenum.

Claims (6)

1. The utility model provides a medicine injection device, is including interveneeing pipe (1), characterized by intervene pipe (1) front end and seal, intervene and be equipped with first pipeline (9) and second pipeline (11) and liquid medicine pipeline (12) in pipe (1), intervene pipe (1) and go up to establish second expansion ring (3) and first expansion ring (2) that can bulge in intervene pipe (1) surface from closed end backward along its length direction on the surface of intervene pipe (1), first large ring (2) and second expansion ring (3) are the closed ring pipe that encircles and laminate and intervene pipe (1) surface, the rear end of first pipeline (9) and second pipeline (11) stretches out and intervenes pipe (1) rear end, and first pipeline (9) front end intervenes first expansion ring (2) through first trompil (5) intercommunication first expansion ring (2) of intervening pipe (1) surface, and second pipeline (11) front end communicates second expansion ring (3) through second trompil (7) intercommunication second expansion ring (3) of pipe (1) surface ) The utility model discloses a medicine liquid pipeline (12), medicine liquid pipeline (12) rear end stretches out intervenes pipe (1), medicine liquid pipeline (12) front end intercommunication intervenes play medicine hole (6) that pipe (1) surface was seted up, play medicine hole (6) locate intervention pipe (1) surface between first expansion ring (2) and second expansion ring (3).

2. The drug injection device according to claim 1, wherein a drainage tube (10) is further arranged in the interventional catheter (1), the front end of the drainage tube (10) is communicated with a drainage inlet hole (8) formed in the surface where the closed end of the interventional catheter (1) is located, the rear end of the drainage tube (10) is communicated with a drainage outlet hole (4) formed in the surface of the interventional catheter (1), the drainage outlet hole (4) is located on one side of the first expansion ring (2), and the first expansion ring (2) is located between the drainage outlet hole (4) and the drug outlet hole (6).

3. A medicament injection apparatus according to claim 1, in which the first and second conduits (9, 11) and the medicament delivery conduit (12) are connected at their rear ends to a first connector (13), a second connector (14) and a medicament delivery connector (15), respectively.

4. A medicament injection apparatus according to claim 1, in which the first and second openings (5, 7) are each provided in plurality and each surround a surface of the interventional catheter (1).

5. A medicament injection apparatus according to claim 1, in which the second conduit (11) communicates with the first conduit (9).

6. A medicament injection apparatus according to claim 1, in which the outlet (6) is plural and distributed along the length of the interventional catheter (1).

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