Instruments

Question 1

Scissors

Answer 1

• Used to cut or dissect tissue & inanimate objects
• Tripod (thumb–ring finger) grip is recommended – maximal control
• Using the end of the blade stabilizes tissue more securely and allows a more precise cut
• Can be curved/straight, tips are sharp/blunt
• Curved scissors – greater maneuverability (ohjattavuus) and visibility
  • Straight scissors – mechanical advantage for cutting dense tissue
  • Sharp (regular cutting) and blunt dissection possible

Question 2

Mayo scissors

Answer 2

• Dissecting soft tissue
• Thick blades approximately
  one-third of the length

Question 3

Metzenbaum scissors

Answer 3

• Dissecting delicate soft tissue
• Thin delicate blades approximately
  one-fourth of the overall length

Question 4

Blunt/sharp operating (utility) scissors

Answer 4

• Often reserved for use on inanimate objects (e.g., suture material)

Question 5

Tenotomy scissors

Answer 5

Used to perform delicate surgery. They can be straight or curved, and blunt or sharp, depending upon necessity.
Can be used in many surgical specialties, in particular delicate operations in ophthalmic surgery, oral and maxillofacial surgery, or in neurosurgery.

Question 6

Needle holders

Answer 6

• Jaws short and frequently have grooves that are cross-hatched on the surface intended to limit twisting and rotation of the needle
• Should match both the size and the type of the needle being used
• Different locking mechanisms possible
• Needles placed perpendicular to the needle holder – greatest
  maneuverability
• Needle is generally grasped near its center

Mayo-Hegar most common

Olsen-hegar, mathieu

Question 7

Tissue forceps

Answer 7

Allis, Doyen, Halsted-Mosquito, Crile, Kelly, Rochester-Carmalt