Instruments & Sutures MCQs

CO2 CO, is the gas used to create pneumoperitoneum during laparoscopy. Other option is - N20 : But it is expensive, less soluble in blood and supports combustion. Also know : Instrument used for creating pneumoperitoneum is veress needle. Flow Rate of CO, for creating pneumoperitoneum 200 - 2000 ml/min & pressure between 15 - 25 mm of Hg.

Physical structure . Suture material may be monofilament or multifilament. Monofilament suture material is smooth and tends to slide through tissues easily without any sawing action, but is more difficult to knot effectively. Such material can be easily damaged by gripping it with needle holder or forceps and this can lead to fracture of the suture material. Multifilament or braided sutures are much easier to knot, but have a surface area of several thousand times that of monofilament sutures and thus have a capillary action and interstices where bacteria may lodge and be responsible for persistent infection or sinuses. In order to overcome some of these problems, certain materials are produced as a braided suture, which is coated with silicone in order to make it smooth. Reference : Love & Bailey short practice of surgery, chapter: 7, Edition: 27th, Pg: 90

Polygalactin also known as vicryl is a monofilament synthetic absorbable suture used in CBD, ureter and bowel surgeries Reference : Love & Bailey short practice of surgery, chapter: 7, Edition: 27th, Pg: 92

Option A Testicular torsion is most common in adolescents, but may occur at any age and is usually inside the tunica vaginalis. Perinatal torsion differs and is usually extravaginal. Option C At operation, viability of the testis is assessed after de rotation. Option D If salvageable, three-point fixation of both testes with non-absorbable sutures is performed. Reference: Bailey and love’s short practice of surgery, 27 th edition, Page - 125

When the suture is cut after knotting, the ends should be left about 1-2 mm long to prevent unraveling. This is particularly important when using monofilament material. Reference : Love & Bailey short practice of surgery, chapter: 7, Edition: 27th, Pg: 96

The French scale begins at zero, and each increment of one French unit represents an increase of 1/3 (0.33) millimeter in outer diameter (3): i.e., French size × 0.33 = outside diameter (mm). Thus, a catheter that is 5 French units in size will have an outer diameter of 5 × 0.33 = 1.65 mm Reference: E Book of Baheti's Understanding Anesthetist Equipments and Procedures a Pratical Approach First Edition Chapter 33 Page No 339 -334.