36 results about "Right lacrimal sac" patented technology

A medical device for delivering medication to an eye includes a stent having a proximal end and a distal end, the proximal end includes a collarette configured to be secured against a punctum of the nasal lacrimal system, and the distal end includes an expandable pouch for storing the medication to be delivered to the eye. The stent has a length substantially equivalent to a length of a canaliculus that is joined to the punctum such that, when implanted, the expandable pouch of the medical device is disposed in the nasal lacrimal sac of the patient and the medication is thereafter released through an opening in the collarette. A mechanical pumping mechanism in the expandable pouch and/or a membrane covering the opening in the collarette may be provided to better control release of the fluid. The stent may also include anchoring pegs disposed on an exterior surface thereof that, when the device is implanted, contact an interior surface of the canaliculus. An inserter tool is also described.

The invention relates to an adjustable lacrimal passage stent. The stent is composed of a side tube, a balloon threading tunnel, a balloon lateral expansion tube, a body stent lateral expansion tube, a valve water injection tube, a water injection needle, a balloon supporting inner container and a body stent supporting inner container. The side tube tail end is connected with the balloon lateral expansion tube which is connected with the balloon threading tunnel, the balloon lateral expansion tube is shaped like ellipsoid and wraps the outer side of the balloon supporting inner container, the balloon supporting inner container tail is connected with the body stent lateral expansion tube which is arranged on the outer side of the body stent supporting inner container in a sleeving mode, micro holes are uniformly formed in the surface of the body stent lateral expansion tube, and the body stent lateral expansion tube tail is connected with the valve water injection tube. The adjustable lacrimal passage stent has the advantages that the stent simulates the structure of a lacrimal passage and comprises a lacrimal point, a lacrimal sac and a nasolacrimal duct, the potential function of the lacrimal passage smooth muscle can be simulated, tissue edema of the lacrimal passage is not likely to be caused, blood supply of the lacrimal passage is enhanced, an inflammatory reaction of the lacrimal passage is relieved, and the effect of adjusting lacrimal passage expansion and contraction is achieved.

The invention relates to the field of ophthalmology department medical apparatuses and instruments, and provides a lacrimal passage retain tube. The lacrimal passage retain tube comprises a tube body and a sleeve. The tube body is sleeved with the sleeve. The sleeve is matched with the upper portion of the tube body. The sleeve comprises a sleeve body and a clamping piece. The clamping piece is arranged at the upper end of the sleeve body. The lacrimal passage retain tube has the advantages that the tube body and the sleeve are matched for use, the tube body enters a lacrimal sac through the lacrimal ductule and is fixed to the margo palpebrae through the clamping piece, the phenomenon that the lacrimal passage retain tube automatically comes off or exits back to the lacrimal passage is avoided, meanwhile, the patient retention period comfort level of the lacrimal passage retain tube is improved, and the adaptive phase is shortened; the lacrimal passage retain tube is directly removed from upper and lower lacrimal points after the lacrimal passage implantable tube retention and does not need to be removed through a nasal cavity, and the lacrimal passage retain tube is convenient to disassemble and easy and convenient to implement, and meanwhile avoids clinic complications; the lacrimal passage retain tube is simple in structure, simple in manufacturing technology and easy to produce.

The invention relates to a catheter for a lacrimal passage. The catheter comprises a lacrimal sac part and a naso-lacrymal duct, wherein the lacrimal sac part is located at the upper end of the naso-lacrymal duct and comprises at least three elastic wires. The lower ends of the elastic wires are fixedly connected with the upper end of the naso-lacrymal duct, while the upper ends of the elastic wires are fixedly connected with a fixed ring, and drainage gaps are formed between the adjacent wires. The elastic wires are metal wires which are arc-shaped, and a silica gel layer is formed on the surface of each elastic wire. With the adoption of the catheter for the lacrimal passage in the structure, the lacrimal sac part is made of memory metals. When the lacrimal sac part is implanted, the elastic wires are extruded by the lacrimal passage to be straightened, so that the catheter is easier to implant, and pain of the patient is less. When the lacrimal sac part reaches the lacrimal sac of the human body, the elastic wires are recovered to the original expanded state to effectively dilate the lacrimal sac part without irritating the mucosa. The catheter for the lacrimal passage has a very good drainage effect, and tear is introduced to the naso-lacrymal duct through the drainage gaps among the elastic wires, so that the catheter drains thoroughly and no residual tear is left in the lacrimal sac.

The invention discloses a nursing lacrimal passage flushing fluid for infantile dacryocystitis and a preparation method of the flushing fluid. The flushing fluid is prepared from the following active pharmaceutical ingredients in parts by weight: sida acuta, semen lepidii, polygonum hydropiper, Chinese mosla herb, rhizoma bolbostematis, nephelium lappaceum, ganoderma, leaf and twig of nakedflower beautyberry, platycodon grandiflorum, all-grass of Chinese Ixeris, philippine violet herb, syneilesis aconitifolia, all-grass of delavay pararuellia, purslane seed, radix gentianae macrophyllae, herb of flannel mullein, lycopus lucidus, selfheal, sappan wood, lysimachia congestiflora Hemsl., rhizoma homalonemae and chestnut endocarp. The flushing fluid and the preparation method have the benefits that the efficacies of promoting evacuation of secretions in lacrimal sac, and thoroughly removing purulent or mucous secretions are promoted, the problem that the conventional lacrimal passage flushing fluid is irritant to eyes can be solved, and the advantages such as high efficiency, high effective rate, exact treating effect, short treating course, zero toxic or side effect, and low price are achieved.

The invention relates to an air-injection type lacrimal stent supporting device. The lacrimal stent supporting device comprises a lacrimal stent and an air-injection needle. The lacrimal stent comprises an upper lacrimal ductule part, a lower lacrimal ductule part, a lacrimal sac part, a nasolacrimal duct part and an air-injection hole; the upper lacrimal ductule part and the lower lacrimal ductule part are both of a hollow structure and are communicated with the lacrimal sac part; the lacrimal sac part is communicated with the nasolacrimal duct part; one end of the nasolacrimal duct part is communicated with the lacrimal sac part, and the air-injection hole is formed in the other end of the nasolacrimal duct part. The air-injection needle comprises an air-injection needle body, an air-injection cylinder, an LED lamp, a piston and an LED lamp switch. The air-injection type lacrimal stent supporting device has the advantages that by adjusting the thickness of the stent, inflammatory substances in a lacrimal passage are helped to be washed, and the functions of the sphincter of the lacrimal passage are exercised; the operation is simple and convenient, a patient can operate the supporting device by himself/herself at home, the medical cost is greatly reduced, the epiphora state of the patient can be better improved, the life quality of the patient is improved, and meanwhile, therecurrence rate of obstruction of the lacrimal passage is reduced.

The invention relates to an adjustable expansion three-cavity two-bag lacrimal passage catheterization tube for lacrimal passage blockage. The three-cavity two-bag lacrimal passage catheterization tube comprises a side tube, a lacrimal passage main support catheter, a wire passing tunnel, an expandable ball bag, an inner and outer tube tight connection position, an expendable ball post, a ball bagwater injection fine tube, a ball post gas injection fine tube, and a ball post gas injection tube fixing loop, wherein the expandable ball bag surrounds the upper section of the lacrimal passage main support catheter; the expendable ball post surrounds the lower section of the lacrimal passage main support catheter; the inner and outer tube tight connection position is arranged between the expandable ball bag and the expandable ball post. The adjustable expansion three-cavity two-bag lacrimal passage catheterization tube for lacrimal passage blockage has the advantages that the ball bag sizein the lacrimal sac part can be regulated in an individualized way according to the lacrimal sac size of a patient; the lacrimal passage catheterization tube is stabilized; the falling is prevented;meanwhile, the ball post in the lacrimonasal duct position can be regularly moved and expanded; the loose adhesion tissues can be reduced; the lacrimonasal duct position blockage condition is relieved; the functions of lacrimal passage sphincter muscle is trained; the operation is simple; convenience and fast are realized; the epiphora state of the patient can be better avoided; the life quality of the patient is improved.

A lacrimal drug delivery device includes a reservoir configured to hold a drug. The reservoir is moveable between a relaxed state and an expanded state. A connector is fluidly coupled to the reservoir and a lumen is formed in the connector wherein the drug is configured to flow from the reservoir to an delivery site through the lumen. A hydrogel is within the lumen and configured to absorb the drug from the reservoir and deliver the drug from the lumen at the delivery site. The hydrogel includes a first section which absorbs the drug at a first rate of absorption. A delivery guide is detachably coupled to the reservoir to deliver the reservoir into a lacrimal sac of a patient.

The invention relates to an insert for the treatment of dry eyes, wherein the insert can be placed on or inserted into the lacrimal sac or the cornea.

The invention discloses a self-expanding microsphere for lacrimal sac expansion and a preparation method thereof. According to the skin expansion principle, the self-expanding microspheres are implanted into the lacrimal sac in an injection mode in the early stage of an operation, the microspheres absorb water in the lacrimal sac to expand and maintain the expansion state for a certain time, the lacrimal sac is expanded, and after the size of the lacrimal sac meets the operation requirement, a lacrimal sac and nasal cavity anastomosis operation under an endoscope is carried out, meanwhile, the microspheres in the lacrimal sac are taken out, and the self-expanding microspheres have good biocompatibility and certain mechanical property, can expand to 5 mm or above after absorbing water in the lacrimal sac and maintain the expansion state for a certain time, so that the effect of expanding the horizontal distance of the lacrimal sac is achieved.

The invention relates to a nasal cavity scalpel, in particular to a nasal cavity scalpel for cutting the lacrimal sac of the nasal cavity, and belongs to the technical field of medical instruments. The endoscopic nasal cavity dacryocystectomy scalpel comprises a knife handle 1 and a knife head 2 mounted on one end of the knife handle 1. The knife head 2 is sickle-shaped and curved to the coronal plane. There are 3 knife points on the knife head 2 Upturned in the sagittal plane. The scalpel can cut any point on the inner wall of the lacrimal sac without damaging the outer wall of the lacrimal sac when cutting the inner wall of the lacrimal sac. It can also cooperate with the uncinate sickle knife to cut out the ideal shape of the lacrimal sac mucosal flap, open a large lacrimal sac nasal cavity, and effectively flip the mucosal flap, which is beneficial to prevent stoma atresia or stenosis, and greatly improve the lacrimal sac lacrimal sac in nasal endoscopy. Ostomy success rate.

The invention provides an artificial nasolacrimal canal, belongs to the technical field of medicine, and solves the problems that canaliculus lacrimalis cannot be lead in the conventional artificial nasolacrimal canal, and implant surgery is single. The artificial nasolacrimal canal comprises a drainage main tube; an upper part of the drainage main tube is provided with a plurality of strip-type fixing flaps which are bent towards into an arc shape and have elasticity; and the fixing flaps are provided with a tubular drainage branch pipe which can penetrate into the canaliculus lacrimalis, and the drainage branch pipe is communicated with the drainage main tube. When the artificial nasolacrimal canal is used for curing a disease of the nasolacrimal canal and a lacrimal sac, the problem that the disease cannot be cured because of canaliculus lacrimalis blockage is solved; the artificial nasolacrimal canal has the advantages of simple, convenient and safe operation of the implant surgery, diversity of available operation modes, wide indication and obvious curative effect; and the artificial nasolacrimal canal has an integrated structure so as to improve soundness and increase safety factor and prolong service life.

The invention discloses a lacrimal passage valve probing and expanding instrument, and belongs to the technical field of medical instruments. The instrument comprises a lacrimal point dilator body with a lacrimal point sleeve, a soft lacrimal passage probe with a dilating balloon and a soft lacrimal passage flusher. By means of the mode, the lacrimal point can be expanded in one step according toneeds, due to the lacrimal point sleeve, the lacrimal point hidden in the inner canthi is obvious, repeated traction, lacrimal point finding and other operations are not needed, and the lacrimal pointcan enter the lacrimal passage conveniently. The soft lacrimal passage probe cannot apply excessive force during probing, a false passage is not easy to form, the probe has obvious flexibility and can move downwards along a narrow cavity of the lacrimal passage to prevent iatrogenic false passage, and the dilating balloon can greatly dilate Hasner valve obstruction of the lower opening of the nasolacrimal duct, meanwhile, the soft lacrimal passage flusher can flush pus in a lacrimal sac and harmful substances such as valve probing bleeding, lacrimal passage damage caused when an infant struggles is avoided, operation time is shortened, tissue damage is reduced, and the curative effect is guaranteed.

A duct for tear flow, for connecting the nasal cavity and the lacrimal sac, comprises: a tube, which is set across the nasal mucosa, nasal bone wall and lacrimal sac mucosa, so that the nasal cavity and the lacrimal sac are connected; a positioning element, set on the front of the tube, and fastened on the lacrimal sac mucosa; so that tears flow into the nasal cavity due to a connection between the nasal cavity and the lacrimal sac.

The invention discloses a drainage device for a lacrimal sac operation, comprising a drainage tube. The drainage tube is connected with an implanting tube which is internally provided with a metal rod at one end, a sphere is arranged at one end of the metal rod, the drainage tube is provided with a base, a tube body is arranged in the middle of the base and forms an inclined angle relative to the base so that the tube body is in an arc shape, the center part of the tube body is provided with a drainage cavity, the tube body has an inclined top end surface, the drainage cavity has an elliptical top end, the outer wall of the tube body is the shape of a column formed by a high outer wall and a lower outer wall, the size defined by the long axis and the short axis of the inclined surface in a range of 360 degrees is larger than the outer wall diameter of the tube body, a first through hole is arranged at the upper part of the high outer wall of the tube body, the implanting tube is mounted in the first through hole, and one end of the implanting tube, which is provided with the metal rod, penetrates through a second through hole on the base. The invention is suitable for the drainage treatment on patients with a nasolacrimal canal obstruction syndrome, chronic dacryocystitis syndrome, and the like accompanied with lacrimal canaliculi obstruction syndrome through whole lacrimal passage intubation.