Ophthalmic Suture Needles-MCQs

1. Which type of needle is commonly used in ophthalmic surgery?

A. Spatula

B. Taper Point

C. Reverse Cutting

D. None Of The Above

Explanation:- Correct answer is A

➤ Spatula needles are flat at the top and bottom surfaces to reduce tissue injury. These needles allow maximum ease of penetration and control as they pass between and through tissue layers.

➤ Taper point is used for very soft and the cutting by the point needs to be minimized.

➤ Taper point is used for very soft and the cutting by the point needs to be minimized. Taper-point needles are usually used for superior rectus bridle sutures, microvascular anastomoses, and closure of conjunctival flaps in glaucoma filtration surgery.

➤ Reverse cutting needs are used for suturing tough tissues like scleral grafts suturing, closure of skin on eyelids, etc.

2. Which suture material is most commonly used in ophthalmic surgery?

A. Nylon

B. Silk

C. Polypropylene

D. None of the above

Explanation:- Correct answer is A

➤ Nylon sutures are very strong and have excellent elasticity. They do not cause any reaction in the tissue and the material is very cost-effective compared to other suture materials.

3. Special characteristics of absorbable sutures are

A. Retain their initial strength longer than 3 months

B. Has very little tissue reaction

C. Hydrolyzed by bodily fluids

D. None of the above

Explanation:- Correct answer is C

➤ Absorbable sutures are hydrolyzed by bodily fluids. This means body fluids can break down the suture material and this gets absorbed.

➤ Absorbable sutures provide wound support during the first few days and later this support reduces as the suture begins to be absorbed.

➤ Complete absorption after implantation happens in 60-90 days. This avoids a second procedure for suture removal.

4. Which of the following sutures' sizes indicates the thinner suture?

A. 2-0

B. 5-0

C. 11-0

D. 7-0

Explanation:- Correct answer is C

➤ Sutures are numbered by their size relative to their diameter. The most commonly used standard for suture size is the USP scale, Which denotes dimensions from fine to thick (with diameters in inches) according to a numeric scale, with 12-0 being the smallest and 7 the largest.

5. 10-0 Polypropylene sutures are specially used for

A. SICS Surgery

B. Trabeculectomy surgery

C. Iris Fixation Surgery

D. None of the above

Explanation:- Correct answer is C

➤ Iris Fixation surgery. Polypropylene sutures are indicated for soft tissue approximation and litigation.

➤ It does not adhere to tissues and holds knots better than other synthetic monofilament materials.

➤ Iris is very soft tissue and a 10-0 polypropylene suture is most suitable for this.

➤ SICS is a suture-less procedure as a self-sealing incision is used in this surgery. And in trabeculectomy surgery. And trabeculectomy surgery usually a 10-0 nylon suture is used.

6. Choose the natural absorbable sutures in the below list

A. Catgut

B. Poly Glycolic Acid

C. Polyglactin 910

D. None of the above

Explanation:- Correct answer is A

➤ Catgut or gut suture is an absorbable suture usually manufactured from the intestine of sheep or goats. Catgut sutures are composed of highly purified connective tissue derived from cattle intestines.

➤ The membrane is chemically treated and slender strands are woven together to form a suture.

➤ Gut sutures are used for suturing the subcutaneous tissue like palpebral ligaments in the eye.

7. Which of the following suture has higher knot security?

A. Monofilament Nylon

B. Multifilament Silk

C. Monofilament polypropylene

D. None of the above

Explanation:- Correct answer is B

➤ Multifilament sutures such as silk are generally easier to handle and to tie than monofilament sutures.

➤ The braided nature of the suture material ensures that the knots remain as they are tired.

8. In a situation where there is a high risk for infection, which sutures could be the best choice for wound closure?

A. Multifilament sutures