Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
  • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
  • A61F9/007—Methods or devices for eye surgery
  • A61F9/00709—Instruments for removing foreign bodies

Definitions

• the invention relates to an apparatus used for extracting intraocular foreign bodies entering the eye.
• the invention particularly relates to a foreign body extractor used for extracting intraocular foreign bodies in the field of vitreoretinal surgery which contains a pouch made of Polytetrafluoroethylene (PTFE) in order to carry the foreign body until removed from the eye without falling back into the vitreous cavity.
• PTFE Polytetrafluoroethylene
• Intraocular foreign bodies entering the eye can be any material in any size and shape.
• forceps having various designs are currently used for extracting the foreign body or bodies accidentally entered into the eye.
• lassos made of rope passed around the foreign body are also available.
• the basic disadvantage of the apparatus used in the prior art is that the foreign body has an irregular geometry such that said foreign body cannot be grasped with forceps.
• Another basic disadvantage experienced is that the foreign body can break loose from the forceps during extraction and fall into the eye again, further damaging the eye. It is not possible to design a single type and ideal forceps capable of gripping the foreign bodies in various shapes. Therefore; these foreign bodies extracted from the eye without being gripped tightly and securely slide from the forceps right at the time of extraction from the eye and fall back into the eye.
• the risk of damaging the optic nerve and retinal layer of the eye as a result of this secondary trauma is higher than the first trauma.
• the reason for this is that, as the intraocular area is filled with vitreous body at the time of first trauma, the foreign body entering the eye rapidly is retained by said gel-like vitreous body. In the latter case; if the foreign body falls back into the eye at the time of extraction during operation, the intraocular area is empty, thus the damage risk is higher.
• the patent No. TR 2012 15393 can be provided as an example with respect to the prior art.
• the abstract of the invention describes an apparatus used for capturing and extracting, by entrapping, the foreign bodies in different sizes and geometries.
• improvements or advancements are required in the field of foreign body extraction apparatus as distinct from the known methods due to the aforementioned disadvantages and due to inadequacy of the existing solutions on the subject matter.
• the objective of the invention is to eliminate the disadvantages concerning the foreign body extraction apparatus mentioned above and improve foreign body apparatus with inspiration from the prior art.
• the objective of the invention is to ensure that the foreign body is completely surrounded irrespective of the configuration or size.
• Another objective of the invention is to prevent slip and fall of the foreign body during the extraction thereof from the eye.
• Another objective of the invention is to keep the incision made to the eye at a minimum level and to extract the body from the eye without enlarging said incision by virtue of its ultrathin structure.
• the invention relates to a foreign body extractor comprising a frame and a pushing piston and used for extraction of foreign bodies entering the eye in the field of vitreoretinal surgery.
• the invention contains a string, at least one end of which is connected to the pushing piston, and a pouch where said string is connected around the pouch mouth within said frame.
• two ends of said string are connected to the pushing piston.
• said string is in loop form when it is extracted and released from the frame.
• said string is manufactured from an elastic material capable of memorizing the form.
• said string is either polymethyl methacrylate (PMMA) or polyvinylidene fluoride (PVDF) or polyimide or polypropylene (PP) or steel or Polytetrafluoroethylene (PTFE) either.
• PMMA polymethyl methacrylate
• PVDF polyvinylidene fluoride
• PP polypropylene
• PTFE Polytetrafluoroethylene
• said pouch is manufactured from polytetrafluoroethylene material.
• Figure 1 is the view of the foreign body extractor of the invention where the string and the pouch are in closed position and within the frame.
• the pushing piston of the extractor of the invention is pushed in A direction and the string and the pouch can be extracted from the frame.
• Figure 2 is the view of the foreign body extractor of the invention ready for use where the string and pouch thereof are extracted.
• Figure 3 is the view of the foreign body extractor of the invention where the foreign body extracted from the eye is put into the pouch.
• the pushing piston of the extractor of the invention is pulled to B direction and the string and the pouch containing the foreign body can be retracted into the injector frame.
• Figure 4 is the detailed view of the string and the pouch connected to the string of the extractor of the invention.
• the structure of the invention generally consists of the string (1 ), frame (2), pushing piston (3) and pouch (4).
• Said pouch (4) is manufactured from polytetrafluoroethylene material.
• the polytetrafluoroethylene material, end section of which has been shaped into a pouch (4), continues upwards along the string (1 ) in a monolithic manner in the form of two thin connections.
• String (1 ) is used for easy injection of polytetrafluoroethylene pouch into the eye and opening of pouch mouth.
• the traction force used for extracting the foreign body (5) from the eye is applied on / from monolithic polytetrafluoroethylene pouch extending there all along.
• monolithic polytetrafluoroethylene pouch extending there all along.
• One of the most significant properties that enable the process to be safe is the monolithic nature of the polytetrafluoroethylene structure and that its extensions continue along the string (1) and protrude outside when the foreign body is entrapped within the pouch (4) section within the eye. In this manner, the traction force extracting the foreign body (5) from the eye is applied uninterruptedly to the monolithic polytetrafluoroethylene material.
• the string (1) is manufactured from an elastic material capable of taking loop form when released and capable of memorizing this form / having loop memory.
• Said material can be polymethyl methacrylate (PMMA), polyvinylidene fluoride (PVDF), polytetrafluoroethylene, polyimide or polypropylene (PP) etc.
• the frame (2) is the external structure entering the eye.
• the frame (2) is injector frame in tubular form. It can be produced in different sizes.
• the pouch (4) and string (1 ) which entrap the foreign body (5) and enable the extraction thereof without the body falling back into the eye, are provided within this frame.
• the pushing piston (3) is the mechanism which pushes the pouch (4) into the eye together with the string (1 ) and retracts the same when the body (5) enters the pouch (4).
• the pouch (4) is fixed around the string (1) in such a manner to form a bag shape and continues as a monolithic structure all along both sides of the string (1). ( Figure 4)
• Teflon pouch (4) is wrapped around the elastic loop (string (1)) in such a manner to have a hollow center like a bag ( Figure 1). Then, pouch (4) and its ring (1) are placed into the frame (2) and fixed by using the pushing piston.
• the final user form of the apparatus (extractor) of the invention is illustrated in Figure 2.
• Polytetrafluoroethylene material which comes from the loop part of a thin steel wire (string (1)) in the form of a loop with a diameter up to 2cm and extended into the frame (2) from both sides, when it is completely released; is prepared.
• the pouch (4), string (1) and piston (3) are respectively inserted into the frame (2) from the end to the inside.
• the extractor (10) into the eye and pushes the pushing piston (3) (in A direction); thus ensuring that first the pouch (4) then the string (1) comes out.
• the string (1) enables the pouch (4) to be opened like a basket.
• the pouch (4) and string (1) are extended into the eye.
• the surgeon retracts the piston (3) backwards after putting the foreign body (5) into the pouch (4).
• the string (1) retracted from the eye and containing the foreign body (5) is closed as retracted (in B direction) and the foreign body (5) is entrapped within the pouch (4).
• the foreign body (5) can be easily immobilized and extracted from the eye.
• the frame (2) and the piston (3) are set aside in such a manner to enable the string (1) and the pouch (4) to remain extending within the eye. In this manner, the foreign body (5) is extracted by pulling the polytetrafluoroethylene structure outside in such a manner to easily manipulate without the extractor frame (2) and piston (3).

Landscapes

• Health & Medical Sciences (AREA)
• Ophthalmology & Optometry (AREA)
• Heart & Thoracic Surgery (AREA)
• Surgery (AREA)
• Engineering & Computer Science (AREA)
• Biomedical Technology (AREA)
• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• Vascular Medicine (AREA)
• Life Sciences & Earth Sciences (AREA)
• Animal Behavior & Ethology (AREA)
• General Health & Medical Sciences (AREA)
• Public Health (AREA)
• Veterinary Medicine (AREA)
• Prostheses (AREA)
• Sampling And Sample Adjustment (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51177126

Family Applications (1)

Country Status (3)

Families Citing this family (7)

Citations (1)

Family Cites Families (7)

• 2014
  • 2014-05-05 CN CN201480075863.3A patent/CN106102669A/zh active Pending
  • 2014-05-05 EP EP14738926.6A patent/EP3091951A1/en not_active Withdrawn
  • 2014-05-05 WO PCT/TR2014/000151 patent/WO2015105465A1/en active Application Filing

Patent Citations (1)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events