Cardiology

Procedure to open blocked carotid arteries tested

(Medical Xpress)—Doctors at Washington University School of Medicine in St. Louis are investigating a minimally invasive procedure to open blocked carotid arteries in patients whose poor health or advanced age makes the ...

Obstetrics & gynaecology

Tissue adhesive, sterile strips similar after cesarean section

(HealthDay)—With cesarean deliveries, wound complications are similar for tissue adhesive and sterile strips when used after closure of a Pfannenstiel skin incision, according to a study published online July 9 in Obstetrics ...

Ophthalmology

Marking can improve accuracy of eyelid chalazia curettage

(HealthDay)—A new marking method can improve the accuracy of incision and curettage of eyelid chalazia, according to a letter to the editor published online May 26 in Clinical & Experimental Ophthalmology.

Ophthalmology

Sealant gel approved for eye surgery

(HealthDay)—A sealant gel to prevent fluid leakage after cataract surgery has been approved by the U.S. Food and Drug Administration.

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Cutting

Cutting is the separation of a physical object, or a portion of a physical object, into two portions, through the application of an acutely directed force. An implement commonly used for cutting is the knife or in medical cases the scalpel. However, any sufficiently sharp object is capable of cutting if it has a hardness sufficiently larger than the object being cut, and if it is applied with sufficient force. Cutting also describes the action of a saw which removes material in the process of cutting.

Cutting is a compressive and shearing phenomenon, and occurs only when the total stress generated by the cutting implement exceeds the ultimate strength of the material of the object being cut. The simplest applicable equation is stress = force/area: The stress generated by a cutting implement is directly proportional to the force with which it is applied, and inversely proportional to the area of contact. Hence, the smaller the area (i.e., the sharper the cutting implement), the less force is needed to cut something.

This text uses material from Wikipedia, licensed under CC BY-SA