CN116270007A

CN116270007A - Retina medicine injection device

Info

Publication number: CN116270007A
Application number: CN202310147974.1A
Authority: CN
Inventors: 吴志勇; 邓德勇; 高菲
Original assignee: Shanghai Heping Eye Hospital Co ltd
Current assignee: Shanghai Heping Eye Hospital Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-06-23

Abstract

The invention relates to an intraocular drug injection device, in particular to a subretinal drug injection device or a retinal intravascular drug injection device. Many ocular fundus diseases require treatment with subretinal or retinal intravascular injection of drugs. The operation of the drug injection surgery requires very accurate and the injection pressure is required to be stable and controllable. At present, a common injector is adopted in clinic to make an injection device by self after being manually modified, however, the manufacturing process is complicated, the self-made device is not standard, the drug injection failure can be caused, and even the operation complication occurs. The invention mainly aims to prepare an injector device capable of injecting medicines at a micro-uniform speed, which consists of an empty cylinder, a piston and a core rod. The hollow cylinder is divided into an inner layer and an outer layer, wherein the inner layer can extract and temporarily store medicines, and the outer layer hollow cylinder can be directly connected with a pressure pipeline of the glass body cutting machine. The inner and outer hollow cylinders are sealed by fixedly connected double pistons, and scales are marked on the inner hollow cylinder of the device. After extracting a proper amount of medicine injection, the core rod can be screwed down anticlockwise, the hollow cylinder curled edge is connected with a pressure pipeline of a vitreous body cutting machine, and after the conical head is connected with a special needle head, an operator sets proper injection pressure, so that subretinal or intraretinal vascular injection can be performed.

Description

Retina medicine injection device

Technical field:

the invention relates to the technical field of medical equipment, in particular to a retina medicine injection device, and especially relates to a retina sub-injection medicine or retina intravascular medicine injection device which is disposable.

The background technology is as follows:

many ocular fundus diseases require treatment with subretinal or retinal intravascular injection of drugs. The operation of the drug injection surgery requires very accurate and the injection pressure is required to be stable and controllable. At present, a common injector is adopted clinically, a self-made injection device is adopted after the common injector is modified by a hand, and the injection is completed by connecting a special injection needle. However, the manufacturing process is complicated, the self-made device is not standard, the operation does not accord with the mechanical principle, the stability is poor, the drug injection failure can be caused, and even the operation complication occurs. Therefore, the design of the intraocular drug injection device is imperative, the operation can be accurately and controllably realized, and the intraocular drug injection device is better beneficial to patients.

The invention comprises the following steps:

the invention mainly aims to prepare an injector device capable of injecting medicines at a micro-uniform speed, and after two ends of the device are respectively connected with a special intraocular injection needle head and a pressure pushing pipeline, the medicines can be slowly injected into the subretinal or retinal blood vessels at a uniform speed. The device consists of a hollow cylinder, a piston and a core rod. The hollow cylinder is divided into an inner layer and an outer layer, the inner layer and the outer layer hollow cylinders are sealed by fixedly connected double pistons, wherein the inner layer can extract and temporarily store medicines, the conical head extends out of the outer layer hollow cylinder and can be connected with the microneedle injection head, and the curled edge of the outer layer hollow cylinder can be directly connected with a pressure pipeline of the vitreous body cutting machine. The bottom of the outer hollow cylinder is provided with a fine hole to balance the pressure difference between the inside and the outside of the hollow cylinder when the piston moves. The hollow cylinder in the inner layer of the device is marked with scales, wherein each big lattice marked by numbers is 0.1ml, each small lattice is 0.01ml, and at most 0.5ml of medicine can be extracted.

Description of the drawings:

fig. 1 is a side view of the device after extraction of a medication.

Fig. 2 is a side view of the device without medication extracted.

Fig. 3 is a side view of the empty cartridge of the present apparatus.

FIG. 4 is a top view of the tail end of the hollow cylinder, wherein the inner and outer circles are respectively the inner and outer hollow cylinders, and the outermost layer is the edge of the hollow cylinder.

FIG. 5 is a side view of the core rod and piston

Fig. 6 is a side view of the size piston connected and secured by a connecting rod.

FIG. 7 is a side view of a core rod connected to a large piston by a screw port. After the medicine is extracted, the core rod can be rotated out anticlockwise.

Fig. 8 is a bottom view of a core pin with a spiral head in the middle and a cross-shaped rod with a push button at the end.

Fig. 1 example: 1. the device comprises an outer hollow cylinder, an inner hollow cylinder, a piston connecting rod, a large piston, a small piston, a core rod, a pressing hand, a hollow cylinder bottom pore, a hollow cylinder curled edge, a conical head and a conical head hole.

The specific embodiment is as follows:

the taper head 10 of the device is connected with the needle of a medical injector, the push handle 7 and the core bar 6 are drawn, and a proper amount of medicine injection is extracted. A micro needle dedicated for subretinal injection or retinal vascular injection is replaced and connected to the conical head 10. The hollow tube curled edge 9 is connected with a pressure pipeline of a vitreous cutting machine by screwing down the core bar 6 anticlockwise, proper injection pressure is set, and the retinal or retinal intravascular injection is carried out after the pressure is applied by an operator. The device should be disposable and disposable.

Claims

1. A retinal drug injection device, comprising:

an inner hollow cylinder, an outer hollow cylinder, a double piston and a core rod.

The inner hollow cylinder can extract and temporarily store the medicine, the outer hollow cylinder can be directly connected with a pressure pipeline of the vitreous body cutting machine, and the medicine can be injected at a constant speed after being pressurized.

2. The inner and outer hollow cylinders of claim 1 are sealed by a double piston.

3. The dual piston of claim 1 secured therebetween by a connecting rod.

4. A pore is left at the bottom of the outer hollow cylinder of claim 1 to balance the pressure difference between the inside and outside of the syringe when the piston moves.

5. The core rod of claim 1 is rotatably detachable with a large piston screw connection.