Ophthalmic marking device and method of using same
An ophthalmic marking device is provided herein for marking a patient's eye. The device may include a handle and a tip with a tip element, a first portion of the tip element protruding from the tip to be exposed. The tip element is electrically conductive to resistively generate heat with electrical flow therethrough. A source of electrical power is associated with the device and electrically coupled to the tip element. The source of the electrical power and the tip element are configured to cause the first portion of the tip element to have a temperature in a range of 250° F.-450° F. Advantageously, the subject invention provides for a relatively low-cost device for marking a patient's eye and allows for creating a less traumatic marking on a patient's eye as compared to higher temperature electrocautery devices.
1. A method of marking a patient's eye with reference marks for ophthalmic procedures, the method comprising:
providing an ophthalmic marking device having:
a handle having an enclosed body with a proximal end and a distal end with first and second contacts exposed therethrough;
a tip removably mountable to said distal end of said enclosed body of said handle;
an electrically conductive tip element at least partially within said tip, said tip element including spaced-apart first and second leads with an arched conductor extending therebetween in physical-direct contact with said first and second leads to define a closed electrical flow path between said first and second leads such that application of an electrical potential across said first and second leads results in electrical flow through said conductor, a first portion of said tip element protruding from said tip to be exposed, wherein said first and second contacts are configured to insertingly receive said first and second leads, and wherein said first and second leads each include a loop-shaped portion, said loop-shaped portions being received in said first and second contacts with sufficient interengagement therebetween to retain said conductive tip on said handle when mounted thereto; and,
an electrical power storage contained within the enclosed body, said electrical power storage being electrically connectable to said conductive tip element with said first and second leads received in said first and second contacts, respectively, with said tip removably mounted to said enclosed body, wherein, removal of said tip from enclosed body causes separation of said first and second leads from said first and second contacts,
wherein, said tip element and said electrical power storage are configured so that, with electrical flow through said tip element caused by said electrical power storage, heat is resistively generated in said tip element with temperature in the range of 250° F.-450° F. at said first portion of said tip element;
actuating said ophthalmic marking device to allow said electrical power storage to cause electrical flow through said tip element so that heat is resistively generated in said tip element with a temperature in the range of 250° F.-450° F. at said first portion of said tip element; and,
contacting a target site on a patient's eye to be marked with a reference mark with said first portion of said tip element and maintaining contact for at least one second with the temperature at said first portion of said tip element being in the range of 250° F.-450° F.
2. A method as in claim 1 , wherein said actuating is initiated prior to contacting the target site.
3. A method as in claim 1 , wherein said electrical power storage is a battery having a voltage of at least 0.75 volts.
4. A method as in claim 1 , wherein said electrical power storage has a voltage of 0.75-6.0 volts.
5. A method as in claim 4 , wherein said electrical power storage has a voltage of 0.75-3.0 volts.
6. A method as in claim 5 , wherein said electrical power storage has a voltage of 1.5 volts.