Surgery Quiz 32 Quiz InstructionsThis quiz consists of 20 multiple-choice questions.You will be awarded 5 marks for each correct answer. Question 1: What is the primary microbial indicator used for verifying the effectiveness of ethylene oxide gas sterilization?Bacillus cereusBacillus subtilis var. globigiiClostridium sporogenesGeobacillus stearothermophilus Question 2: Resterilizing polyvinyl chloride (PVC) items with ethylene oxide that were previously sterilized by gamma radiation can lead to the formation of which toxic compound?Formaldehyde gasBeta-propiolactoneEthylene chlorhydrinBenzalkonium chloride Question 3: Which chemical compound is recommended to be added at a rate of 4 g/L to cold sterilizing disinfectant solutions to prevent the rusting of surgical instruments?Sodium chloride (NaCl)Sodium nitrite (NaNO2)Sodium bicarbonate (NaHCO3)Sodium hydroxide (NaOH) Question 4: Why does 70% ethyl alcohol possess greater germicidal efficacy than absolute (100%) ethyl alcohol?Absolute alcohol evaporates too slowly to cause cell lysis.The presence of water in 70% alcohol is necessary to easily denature proteins.Absolute alcohol contains impurities that neutralize its active site.Water acts as a catalyst that chemically decomposes the bacterial cell wall directly. Question 5: According to the risk classification of surgical instruments and equipment, how is an esophageal stethoscope categorized?Critical itemSemi-critical itemNon-critical itemUltra-critical item Question 6: Which of the following is a synthetic, monofilament, absorbable suture material that maintains high tensile strength, is absorbed via hydrolysis, and is ideal for slower healing tissues like tendons and ligaments?Polyglycolic acid (Dexon)Polyglactin 910 (Vicryl)Polydioxanone (PDS)Polyglecaprone 25 (Monocryl) Question 7: How does the USP size 4/0 (0000) catgut suture material compare to the size 1/0 (0) catgut suture material in terms of outer diameter?4/0 is 0.203 mm, while 1/0 is 0.406 mm4/0 is 0.483 mm, while 1/0 is 0.254 mm4/0 is 0.330 mm, while 1/0 is 0.559 mm4/0 is 0.254 mm, while 1/0 is 0.406 mm Question 8: Which organic non-absorbable suture material is obtained from the flax plant and is composed of cellulose?SilkCottonLinenNylon Question 9: In veterinary surgery, why is polyglycolic acid contraindicated for the repair of the urinary bladder?It induces a severe, life-threatening tissue reaction in contact with urine.It may be absorbed prematurely when exposed to urine.It causes calcium oxalate crystals to precipitate on the suture line.It is extremely rigid and lacks the pliability needed for hollow organs. Question 10: Match the suture pattern with its primary application category:1. Lembert's pattern2. Horizontal mattress pattern3. Quill sutures4. Subcuticular pattern1 - Inversion, 2 - Eversion, 3 - Relaxation, 4 - Apposition1 - Eversion, 2 - Apposition, 3 - Inversion, 4 - Relaxation1 - Relaxation, 2 - Inversion, 3 - Apposition, 4 - Eversion1 - Inversion, 2 - Relaxation, 3 - Eversion, 4 - Apposition Question 11: Match the surgical repair technique with its recommended suture pattern:1. Herniorrhaphy2. Tenorrhaphy (round tendons)3. Urinary bladder repair4. Intestinal Anastomosis (Parker Kerr)1 - Vest over pant, 2 - Three loop pulley, 3 - Bell's pattern, 4 - Lembert followed by Cushing1 - Three loop pulley, 2 - Bell's pattern, 3 - Vest over pant, 4 - Lock stitch1 - Bell's pattern, 2 - Vest over pant, 3 - Three loop pulley, 4 - Schmieden's1 - Vest over pant, 2 - Bell's pattern, 3 - Three loop pulley, 4 - Lembert followed by Cushing Question 12: Match the disinfectant with its characteristic antibacterial spectrum or feature:1. Hexachlorophene2. Chlorhexidine3. Quaternary Ammonium Compounds4. Isopropyl alcohol1 - Bacteriostatic for gram +ve only; 2 - Active in presence of organic material; 3 - Neurotoxic detergent; 4 - More bactericidal but more skin irritating than ethyl alcohol1 - Neurotoxic detergent; 2 - Bacteriostatic for gram +ve only; 3 - Active in presence of organic material; 4 - More bactericidal but more skin irritating than ethyl alcohol1 - Bacteriostatic for gram +ve only; 2 - Neurotoxic detergent; 3 - Active in presence of organic material; 4 - Less bactericidal than ethyl alcohol1 - Active in presence of organic material; 2 - Bacteriostatic for gram +ve only; 3 - Neurotoxic detergent; 4 - More bactericidal but more skin irritating than ethyl alcohol Question 13: Evaluate the following statements regarding the physical characteristics of surgical needles:I. Round-bodied needles are designed to cut through dense tissues, leaving a triangular tract.II. Reverse cutting needles have their apex cutting edge on the outside of the needle curvature, increasing resistance to bending.III. Tapercut needles combine the initial penetration of a reverse cutting needle with the minimized trauma of a round-bodied needle.IV. Blunt point needles are typically used for suturing extremely friable vascular tissues like the liver and spleen.Which of the statements are correct?I, II, and III onlyII, III, and IV onlyI, III, and IV onlyI, II, III, and IV Question 14: Review the following statements regarding the properties of suture materials and their sterilization:I. Steam sterilization (autoclaving) is strictly contraindicated for catgut, collagen, and polyglycolic acid.II. Gamma-irradiation can safely sterilize polyglycolic acid and polypropylene repeatedly.III. Cotton and linen suture materials experience a decrease in tensile strength when wet.IV. Ethylene oxide is safe for sterilizing all suture materials.Which of the statements are correct?I and III onlyI and IV onlyII and IV onlyI, II, and IV only Question 15: Which of the following statement groups correctly describes the characteristics of tissue adhesives (cyanoacrylates)?I. Methylcyanoacrylate is a short-chain alkyl derivative that is highly tissue-toxic and breaks down quickly.II. Long and branched chain derivatives like n-butyl and N-octyl cyanoacrylates are almost non-toxic.III. Polymerization of cyanoacrylates occurs upon contact with tissue and is catalyzed by moisture.IV. Cyanoacrylates should be applied deeply between the wound edges to act as a supportive matrix barrier during healing.Which of the statements are correct?I, II, and III onlyII, III, and IV onlyI and III onlyI, II, III, and IV Question 16: Assertion (A): Connell and Jobert suture patterns are generally not preferred for closing hollow visceral organs in clean surgeries.Reason (R): These patterns are seromucosal techniques where the needle penetrates all layers, including the visceral mucosa, which increases the risk of spreading infection from the lumen to the exterior.Both A and R are true, and R is the correct explanation of A.Both A and R are true, but R is not the correct explanation of A.A is true, but R is false.A is false, but R is true. Question 17: Assertion (A): Simple continuous suture patterns should never be used for closing surgical skin incisions in veterinary patients, with the exception of cosmetic ear cropping in dogs.Reason (R): If a capillary-type suture material is used in a continuous pattern and becomes infected at one point, the infection can readily spread along the entire suture line.Both A and R are true, and R is the correct explanation of A.Both A and R are true, but R is not the correct explanation of A.A is true, but R is false.A is false, but R is true. Question 18: Assertion (A): Absolute ethyl alcohol is less germicidal than a 70% concentration of ethyl alcohol.Reason (R): Isopropyl alcohol is more bactericidal than ethyl alcohol but causes greater skin irritation.Both A and R are true, and R is the correct explanation of A.Both A and R are true, but R is not the correct explanation of A.A is true, but R is false.A is false, but R is true. Question 19: An animal presents with primary water depletion due to an esophageal obstruction. The ECF has become hypertonic, drawing water from the ICF. To correct this deficit, what is the appropriate treatment fluid strategy, and what is the typical physiological outcome if the water loss reaches approximately 40% of total body water?Treatment with normal saline (0.18%) and 4.3% dextrose; death occurs due to medullary failure.Treatment with hypertonic 5% saline; recovery occurs via rapid extracellular volume expansion.Treatment with lactated Ringer's solution; death occurs due to metabolic alkalosis.Treatment with 0.9% sodium chloride; death occurs due to acute pulmonary edema. Question 20: In the context of fluid therapy, what are the primary extracellular fluid (ECF) cation and anion respectively?Potassium and PhosphateSodium and ChlorideMagnesium and BicarbonateSodium and Phosphate
0 Comments