CN204734603U - Syringe needle is cut to supersound glass and device thereof - Google Patents

Abstract

The utility model discloses an ultrasonic vitrectomy needle used for absorbing the vitreous body of the eye and a device thereof. An ultrasonic vitrectomy needle comprises a connecting body and an inner needle tube connected thereto, and an outer needle sleeve is sheathed on the outer periphery of the inner needle tube. , the length of the outer needle cannula at the distal end is slightly longer than that of the inner needle cannula, and its distal end is a closed non-sharp flat top surface, and the outer needle cannula grows out of the distal side wall of the inner needle cannula An opening is provided for suction of the vitreous. The beneficial effects of the utility model are reflected in: the design of the slender hollow needle of the ultrasonic system makes it possible to commercialize the ultrasonic vitrectomy technology; The safety degree; the integration of ultrasonic vitrectomy device and ultrasonic cataract emulsification device greatly simplifies the cumbersome design of the current vitrectomy system, and provides great convenience and cost savings for ophthalmic surgery.

Description

A kind of ultrasonic vitrectomy needle and its device

technical field

The utility model relates to a medical device and a method thereof, in particular to an ultrasonic vitrectomy method and a needle head thereof.

Background technique

The human eye can transmit light through the cornea and focus the image through the lens, and then focus on the retina behind through the vitreous to display the image. The quality of focus is determined by many factors, including the size and shape of the eye, and the transparency of the cornea, lens, and vitreous.

The vitreous is a gel-like transparent tissue located at the back of the eye. When eye diseases occur, such as fundus hemorrhage, retinal detachment, etc., it is necessary to use vitrectomy to remove the vitreous. Commonly used vitrectomy surgical instruments include vitrectomy handles, lighting tubes, and liquid injection tubes. The vitrification equipment commonly used in the prior art is pneumatic, and there are also a few electric ones. These cumbersome devices all need corresponding special driving devices to drive. In common ophthalmic surgery equipment, the vitrectomy device is usually integrated with the ultrasonic cataract emulsification device on one machine, which makes the device bulky, complex in design, expensive, and inconvenient to operate; and the operating frequency of the pneumatic device is in the The audio range, the noise is loud, and the movement of the cutting head is large.

In the prior art, there are many phacoemulsification devices, but few vitrectomy devices. Until now, there is still no suitable ultrasonic vitrectomy needle, as well as the corresponding ultrasonic surgical equipment and ultrasonic handle to safely drive the slender hollow needle to transmit a certain amplitude of ultrasonic vibration and safely penetrate into the vitreous body to achieve liquefaction and fragmentation. Effect. In order to solve the above-mentioned problems, the utility model comes from this.

Utility model content

The first technical problem to be solved by the utility model is to provide an ultrasonic vitrectomy needle, which makes it possible to commercialize the ultrasonic vitrification technology, and provides a A safe and applicable ultrasonic vitrectomy needle improves the safety of the operation.

In order to solve the above-mentioned technical problem in the first aspect, the utility model provides an ultrasonic vitrectomy needle, which includes a connecting body and an inner needle tube connected to it, and is characterized in that an outer needle sleeve is provided on the outer periphery of the inner needle tube, The length of the outer needle sleeve at the distal end is slightly longer than the inner needle tube inside it, and its distal end is a closed non-sharp gentle top surface, and the outer needle sleeve grows out of the distal side wall of the inner needle tube. There is an opening for suction of the vitreous.

In the technical solution of the present utility model, a groove is provided on the outer circumference of the inner needle tube of the fastening part, the proximal end of the outer needle sleeve is inserted into the groove, and the outer needle sleeve and the end surface of the fastening part The contact point is sealed and cured with plastic material. The groove at the distal end is used to accept, adjust, and stabilize the center position of the outer needle cannula.

In the technical solution of the utility model, there is a gap between the inner wall of the outer needle sleeve and the outer wall of the inner needle tube.

In the technical solution of the present utility model, a central channel is provided in the connecting body along the central axis to penetrate the connecting body, the central channel has a shape suitable for the inner needle tube, and is used to accommodate the inner needle tube, and the connecting body and The central axes of the inner needle tubes coincide.

In the technical solution of the utility model, the distal end of the outer needle sleeve is a closed plane, or an outwardly convex arc. Of course, other non-sharp and gentle top surface structures known to those skilled in the art are applicable.

In the technical solution of the present utility model, the connecting body includes a fastening part, a threaded part adjacent to the fastening part for connecting the ultrasonic driving handle and a tapered part at the end for fixing the inner needle tube. The fastening part is the working surface of the wrench tool, which has a shape and size suitable for the wrench tool. The threaded part is an external thread arranged on the outer surface of the distal end of the connecting body, and the tapered part is arranged on the outer surface of the connecting body. The proximal end of the threaded part, the tapered part is a tapered body adapted to the inner cavity of the ultrasonic drive handle.

In the technical solution of the utility model, at least one notch is evenly distributed on the tapered part for locking the inner needle tube.

The technical problem of the second aspect to be solved by the utility model is to provide an ultrasonic vitrectomy device, which includes an integrated ultrasonic emulsification device, an ultrasonic drive handle and the ultrasonic vitrectomy needle described in any one of claims 1-6, The ultrasonic vitrectomy needle is connected to the front end of the ultrasonic driving handle through a connecting body, and the ultrasonic driving handle is connected to the phacoemulsification device through a cable.

In the technical solution of the utility model, an internal thread is provided inside the front end of the ultrasonic driving handle to engage with the threaded part of the connecting body.

In the technical solution of the utility model, a tapered surface is provided at the front end of the internal thread part at the front end of the ultrasonic drive handle to cooperate with the tapered part of the connecting body to further shrink the notch of the tapered part, thereby fixing the inner needle tube.

The utility model also provides a method for using an ultrasonic vitrectomy device, which includes the following steps:

(1) Insert the vitrectomy needle into the vitreous body of the eyeball, wherein the ultrasonic vitrectomy needle includes a connecting body and an inner needle tube connected thereto, and an outer needle sleeve is also arranged on the outer periphery of the inner needle tube, and the outer needle sleeve is placed on the outer periphery of the inner needle tube. The length of the distal end is slightly longer than the internal inner needle tube, and the distal end is a closed non-sharp flat top surface, and an opening is provided on the distal side wall where the outer needle sleeve grows out of the inner needle tube,

(2) Turn on the ultrasonic vibration switch, and ultrasonically vibrate the ultrasonic vitrification needle in the vitreous body of the eyeball. This vibration causes the vibration of the inner needle tube to emulsify the vitreous body, and the suction cavity fluidly connected with the ultrasonic vitrectomy needle sucks the emulsified vitreous body.

Compared with the current pneumatic vitrification technology, the ultrasonic vitrification device of the utility model has the characteristics of low noise and small moving distance, and can be easily integrated into the currently commonly used ultrasonic emulsification equipment. The beneficial effects of the utility model are reflected in:

(1) The design of the slender hollow needle for the ultrasonic system makes it possible to commercialize the ultrasonic cutting technology, and the noiseless, small displacement, fluid repulsion and viscosity-reducing effects of ultrasonic vibration improve the safety of the operation;

(2) Design of the distal end of the outer needle sleeve of the ultrasonic vitrectomy needle of the utility model: the distal end of the outer needle sleeve is a closed non-sharp gentle top surface, and the outer needle sleeve grows out of the distal side of the inner needle tube. There is an opening to inhale the vitreous body; the closed flat top surface is to prevent ultrasonic vibrations from being transmitted to the retina and cause damage, and there is only an opening on the distal side of the outer cannula to allow the vitreous body to enter. It solves the problem that the existing tip of the distal end of the ultrasonic needle is extremely sharp and easily punctures tissues and organs, reduces the operation risk, and improves the safety of the operation.

(3) The integration of the ultrasonic vitrectomy device and the ultrasonic cataract emulsification device greatly simplifies the cumbersome design of the current vitrectomy system, and provides great convenience and cost savings for ophthalmic surgery.

Description of drawings

Fig. 1 is a schematic diagram of the connection structure between the ultrasonic vitrectomy needle and the front end of the ultrasonic driving handle according to an embodiment of the present invention.

Fig. 2 is a schematic view of the side structure of an embodiment of the ultrasonic vitrectomy needle of the present invention.

Fig. 3 is a schematic cross-sectional structure diagram of an embodiment of the ultrasonic vitrectomy needle of the present invention.

FIG. 4 is a partially enlarged schematic view of the fastening part of the connecting body in FIG. 3 .

FIG. 5A is a schematic cross-sectional structure diagram of a connector, FIG. 5B is a schematic diagram of a side structure of FIG. 4 , and FIG. 5C is a schematic diagram of a cross-sectional structure at a fastening part of the connector.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in more detail.

As shown in Fig. 2-Fig. 4, Fig. 5A, 5B, and 5C, the ultrasonic vitrectomy needle includes a connecting body 50 and an inner needle tube 60 connected thereto. The hole 55, the central hole 55 has a shape compatible with the inner needle tube 60, and is used to accommodate the inner needle tube 60. A part of the inner needle tube 60 is inserted into the central hole 55 of the connecting body 50, and the central axis of the two coincides. The inner needle tube 60 The other part of the connecting body 50 extends to the distal end, and an outer needle sleeve 70 is also sleeved on the outer periphery of the inner needle tube 60 of the connecting body 50. The length of the outer needle sleeve 70 at the distal end is longer than that of the inner needle tube 60 inside Slightly longer, and its distal end 72 is a closed non-sharp gentle plane, and an opening 71 is provided on the distal side wall of the outer needle sleeve 70 that grows out of the inner needle tube 60 to suck the vitreous.

In a preferred embodiment of the present invention, the distal end 72 of the outer needle cannula 70 can also be an outwardly protruding arc. Of course, other non-sharp and gentle top surface structures known to those skilled in the art are applicable.

In a preferred embodiment of the present utility model, the size of the central hole 55 is slightly larger than the size of the inner needle tube 60 for accommodating the inner needle tube 60; the central hole 55 has a shape compatible with the inner needle tube 60, such as a cylinder Shape, polygon, such as pentagon, hexagon, heptagon, octagon, etc., and the central axis of the connecting body and the inner needle tube coincide.

As shown in Fig. 4 and Fig. 5A, the connection body 50 structure of an embodiment includes a fastening part 51, a threaded part 52 adjacent to the fastening part 51 for connecting the ultrasonic driving handle and a cone at the end for fixing the inner needle tube Shaped part 53. The fastening part 51 is the action surface of the wrench tool, and has a shape and size suitable for the wrench tool. The threaded part 52 is an external thread provided on the outer surface of the connecting body 50, and the tapered part 53 is provided At the proximal end of the threaded portion 52, the tapered portion 53 has a tapered body adapted to the inner cavity of the ultrasonic drive handle, and at least one notch 54 is evenly distributed on the tapered portion 53 for locking the inner needle tube 60.

In the technical solution of the present utility model, a groove 8 is provided on the outer circumference of the inner needle tube 60 of the fastening part 51 (Fig. 4, 5), and the proximal end of the outer needle sleeve 70 is inserted into the groove 8, and the outer needle sleeve The contact between the tube 70 and the end surface of the fastening part 51 is sealed and solidified with a plastic material 4 . The groove 8 provided on the fastening part 51 is used for receiving, adjusting and stabilizing the center position of the outer needle cannula. There is a gap between the inner wall of the outer needle sleeve 70 and the outer wall of the inner needle tube 60, so that only the inner needle tube 60 undergoes ultrasonic vibrations during operation, while the outer needle sleeve 70 does not vibrate, and the output of ultrasonic vibrations will not be reduced. The size of the gap between patients can be adjusted according to specific clinical needs.

When applying the ultrasonic vitrectomy needle of the present utility model, the threaded portion 52 of the connecting body 50 is engaged with the distal internal thread of the ultrasonic driving handle, that is, the connecting body 50 is screwed into the front end of the ultrasonic driving handle through the thread to play a guiding role. The tapered part 53 can be adapted to fit with the tapered surface inside the ultrasonic drive handle. At this time, the notch 54 shrinks due to extrusion during the process of being screwed in, that is, the tapered end side of the tapered surface of the tapered portion 53 is gathered and adhered to the inner wall of the ultrasonic driving handle. Due to the deformation of the cutout 54, the diameter of the central bore 55 also changes. In this way, the inner needle tube 60 is rigidly coupled to the connecting body 50, and further coupled to the distal end of the ultrasonic driving handle, so that the ultrasonic vibration is also effectively transmitted to the front end of the ultrasonic surgical tool head.

When applying the ultrasonic vitrectomy device of the present utility model, as shown in Figure 1, pass the ultrasonic vitrectomy needle 100 through the connecting body 50, connect it to the front end of the ultrasonic drive handle 200 as mentioned above, lock the inner needle tube 60, and connect the ultrasonic drive handle cable For the phacoemulsification equipment, when the power is turned on, the ultrasonic vibration can be effectively transmitted from the front rod 201 of the ultrasonic driving handle to the distal end of the inner needle tube 60 . There is a gap between the inner wall of the outer needle cannula and the outer wall of the inner needle tube 60 , so during operation, only the inner needle cannula undergoes ultrasonic vibration, while the outer needle cannula does not move. When the vitreous tissue enters the tube through the side port 71 of the outer tube 70 due to vacuum and hydraulic pressure in the eye cavity, the vitreous tissue can be broken, liquefied, and viscous-reduced by the ultrasonic vibration at the distal end of the inner tube 60, and the vitreous body can be absorbed by a relatively low suction force. , is sucked out through the inner lumen 60 and the central suction duct 202 of the handle.

It should be understood that although this description is described according to the embodiments, not each embodiment only includes an independent technical solution. For example, the inner needle tube 60 of the present utility model can be made of medical metal materials, or can be made of medical resin. The length of the inner needle tube 60 needs to be designed within a certain range so as not to attenuate the output of ultrasonic vibrations. In addition, due to the particularity of vitrectomy technology, the inner needle tube is required to have a narrower diameter range, usually below 500 μm, preferably 200 μm-500 μm. And the inner needle tube can be made of metal, plastic, resin and other materials, preferably made of metal material.

The utility model claims an ultrasonic vitrification device, which includes an integrated ultrasonic emulsification device, an ultrasonic drive handle and the aforementioned ultrasonic vitrification needle. The internal thread inside the front end of the handle engages and connects, and there is also a tapered surface at the front end of the internal thread part at the front end of the ultrasonic drive handle to cooperate with the tapered part of the connecting body to further shrink the incision of the tapered part, thereby fixing the inner thread The needle, ultrasound-driven handle is connected to the phacoemulsification device by a cable.

The ultrasonic vitrectomy device of the present utility model inserts the vitrectomy needle into the vitreous body of the eyeball during the vitrectomy operation, wherein the ultrasonic vitrectomy needle includes a connecting body and an inner needle tube connected thereto, and a vitrectomy needle is arranged on the outer periphery of the inner needle tube An outer needle cannula that is slightly longer at the distal end than the inner needle cannula inside and that ends with a closed, non-sharp, flat top surface where the outer cannula grows beyond the inner cannula The distal side wall is provided with an opening,

Ultrasonic vibration of the vitrectomy needle in the vitreous of the eyeball causes vibration of the inner needle tube to emulsify the vitreous body, and a suction chamber in fluid communication with the vitrectomy needle to suck the emulsified vitreous body.

The utility model provides a new thought and method for the vitrectomy operation, which is far superior to the vitrectomy operation performed by mechanical and pneumatic methods in the prior art. Ultrasonic vibration has no noise, small displacement and viscosity-reducing effect, which improves the safety of the operation.

The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned examples. The above-mentioned examples and descriptions only illustrate the principle of the utility model. There are various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (9)

1. An ultrasonic vitrectomy needle, which comprises a connecting body and an inner needle tube connected thereto, is characterized in that, an outer needle sleeve is also covered with an outer needle sleeve at the outer periphery of the inner needle tube, and the length ratio of the outer needle sleeve at the far end is The internal inner needle tube is slightly longer, and its distal end is closed with a non-sharp gentle top surface, and an opening is provided on the distal side wall of the outer needle sleeve extending from the inner needle tube to suck the vitreous body. 2. The ultrasonic vitrectomy needle according to claim 1, wherein a groove is arranged on the outer periphery of the inner needle tube of the connecting body, the proximal end of the outer needle sleeve is inserted into the groove, and the outer needle sleeve The contact with the end surface of the connecting body is sealed and solidified with a plastic material. 3. The ultrasonic vitrectomy needle according to claim 1, characterized in that there is a gap between the inner wall of the outer needle sleeve and the outer wall of the inner needle tube. 4. The ultrasonic vitrectomy needle according to claim 1, characterized in that, a central channel passing through the connecting body along the central axis is provided in the connecting body, and the central channel has a shape compatible with the inner needle tube for accommodating The inner needle tube, and the central axis of the connecting body and the inner needle tube coincide. 5 . The ultrasonic vitrectomy needle according to claim 1 , wherein the distal end of the outer needle cannula is a closed plane, or a closed curved surface protruding outward. 6 . 6 . The ultrasonic vitrectomy needle according to claim 1 , wherein the connecting body comprises a fastening part, a threaded part adjacent to the fastening part and a tapered part at the end for fixing the inner needle tube. 7 . The ultrasonic vitrectomy needle according to claim 6 , wherein at least one notch is evenly distributed on the tapered portion for locking the inner needle tube. 7 . 8. An ultrasonic vitrectomy device comprising an integrated phacoemulsification device, an ultrasonic drive handle and the ultrasonic vitrectomy needle according to any one of claims 1-7, the ultrasonic vitrectomy needle is connected to the front end of the ultrasonic drive handle through a connector , the ultrasonically driven handle is connected to the phacoemulsification device through a cable. 9. The ultrasonic vitrectomy device according to claim 8, characterized in that, the front end of the ultrasonic driving handle is provided with an internal thread to engage with the threaded part of the connecting body, and the front end of the internal thread part at the front end of the ultrasonic driving handle is also provided with The tapered surface cooperates with the tapered part of the connecting body to further shrink the incision of the tapered part, thereby fixing the inner needle tube.