OG37.1-7,OG38.1-3 | Operative Observation Skills — Practice Quiz

Correct. The bladder flap (utero-vesical peritoneum) is developed to mobilise the bladder inferiorly away from the lower uterine segment. This protects the bladder from injury when the uterine incision is made and also provides access to the lower uterine segment, which is thinner and less vascular than the upper segment.

Bladder flap dissection is a critical step in LSCS; the bladder is particularly adherent in women with prior uterine surgery or dense adhesions, making this the most dangerous step in repeat LSCS.

The bladder flap is developed primarily to displace the bladder inferiorly before the uterine incision, preventing inadvertent bladder injury. The lower uterine segment is the target for the incision precisely because it is thin, less vascular, and heals well.

Correct. Oxytocin (10 IU IM or slow IV infusion) is the uterotonic of choice in active management of the third stage, including caesarean section. It promotes uterine contraction, reduces uterine atony, facilitates placental separation and delivery, and limits blood loss.

PPH definition: blood loss ≥1000 mL at caesarean or ≥500 mL at vaginal delivery. Oxytocin 10 IU IM is the first-line uterotonic; carboprost (PGF2α) is contraindicated in asthma; ergometrine is contraindicated in hypertension/pre-eclampsia.

Oxytocin given after baby delivery at caesarean section is the uterotonic of choice to promote uterine contraction, assist placental separation, and prevent postpartum haemorrhage — the same active management principle applied vaginally.

Correct. 'Water under the bridge' is the classic anatomical teaching point: the uterine artery (the bridge) crosses anteriorly over the ureter (the water) approximately 1.5 cm lateral to the cervix at the base of the broad ligament. This relationship is the most important anatomical landmark in hysterectomy — clamping without identifying the ureter risks ureteric injury.

Ureteric injury at hysterectomy most often occurs at three sites: the pelvic brim where the ureter enters the pelvis, the uterovesical fold, and at the uterine artery (the 'water under the bridge' point). Recognition of this anatomy is the foundation of safe hysterectomy.

The classic 'water under the bridge' teaches the key relationship at hysterectomy: the uterine artery (bridge) crosses anterior to the ureter (water) ~1.5 cm lateral to the cervix. Failure to identify the ureter at this point is the most common cause of intraoperative ureteric injury.

Correct. In vaginal hysterectomy, the pouch of Douglas (posterior peritoneum) is normally entered first because it is more accessible from below and the peritoneum is thinner here. The anterior peritoneum (utero-vesical pouch) is entered subsequently after the bladder has been displaced anteriorly. This sequence differs from abdominal hysterectomy where the bladder flap is the first peritoneal step.

Vaginal hysterectomy provides a different anatomical perspective from below. The observer should track: posterior colpotomy → pouch of Douglas entry → sacro-uterine pedicles → uterine vessels → anterior colpotomy → bladder displacement → fundal delivery.

In vaginal hysterectomy the pouch of Douglas is entered first because it is more accessible posteriorly and the peritoneum is thinner there, making it the natural entry point from below. The anterior (utero-vesical) peritoneum is opened subsequently.

Correct. The uterine sound determines the direction (axis) and depth (in centimetres) of the uterine cavity. This information is essential before any instrumentation: the size guides selection of dilators, and the direction prevents perforation by ensuring instruments follow the correct angle — critical because the cervico-uterine angle varies with uterine position (anteverted vs retroverted).

The most preventable complication in intrauterine instrumentation is uterine perforation from failure to assess uterine position before sounding. A retroverted uterus requires the sound to be directed posteriorly; failure to account for this angle is the classic cause of fundal perforation.

The uterine sound provides information about the direction of the uterine cavity (angle of the cervico-uterine junction) and the cavity depth in centimetres. This prevents perforation during dilatation and guides selection of curettage instruments.

Correct. In EA-ECC, the endocervical curettage (ECC) is performed FIRST, before the aspiration cannula is passed through the cervix. If endometrial aspiration were performed first, the passage of the aspiration cannula would contaminate the endocervical canal with endometrial tissue, rendering the ECC specimen uninterpretable. The ECC specimen is therefore taken at an uncontaminated endocervix.

Order matters in EA-ECC: endocervical curettage (ECC) first → endometrial aspiration (EA) second. This sequence preserves the integrity of the endocervical specimen, which is separately analysed for endocervical pathology including HPV-associated lesions and adenocarcinoma in situ.

The ECC is done first so the endocervical specimen is obtained from an uncontaminated endocervical canal. Passing the aspiration cannula first would deposit endometrial cells in the endocervix, making the subsequent ECC specimen diagnostically unreliable.

Correct. Before any instrumental delivery the mandatory prerequisites ('ABCDE') must ALL be confirmed: Adequate analgesia, Bladder empty, Cervix fully dilated, Descent confirmed (outlet = head visible/at ≥+2/+3 station), and Exact position known. All five must be present; proceeding without confirming all prerequisites — especially position — risks a misapplied forceps delivery.

Outlet forceps prerequisite mnemonic 'ABCDE': Adequate analgesia, Bladder empty, Cervix fully dilated, Descent confirmed (outlet station), Exact position known. The 'E' (exact position) is the most commonly overlooked — forceps applied to an OP or transverse position without rotation cause scalp and intracranial injury.

All prerequisites for instrumental delivery must be confirmed: Adequate analgesia, Bladder empty, Cervix fully dilated, Descent at outlet, and Exact position known. The exact position is critical because forceps must be applied correctly aligned to the fetal head — a malposition leads to failed or traumatic delivery.

Correct. The MTP Act 1971, as amended in 2021, allows termination up to 20 weeks on the opinion of ONE registered medical practitioner. For the 20–24-week window, TWO RMPs are required, and the indication must fall within specified categories: survivors of rape/sexual assault, minors, change in marital status (divorce/widowhood), foetal abnormality incompatible with life, physical/mental disability, and humanitarian/emergency settings. Beyond 24 weeks, a State Medical Board must approve for substantial foetal abnormalities.

MTP Act 1971 (amended 2021): ≤20 weeks = one RMP; 20–24 weeks = two RMPs for specified categories; >24 weeks = State Medical Board for substantial foetal abnormality only. The PCPNDT Act 1994 prohibits sex-selective procedures — never frame any step of MTP as sex determination.

The MTP Act 2021 extended the upper limit to 24 weeks only for specific categories (rape survivors, minors, marital status change, foetal anomaly, disability) with TWO RMP opinions. Any pregnancy up to 20 weeks requires only ONE RMP's opinion. Beyond 24 weeks, a State Medical Board approval is required.

Correct. CO2 is absorbed across the peritoneum during laparoscopy, raising PaCO2 (hypercarbia). The Trendelenburg (head-down) position used in gynaecological laparoscopy further compromises ventilation by allowing abdominal contents to push the diaphragm cephalad. The anaesthetist must increase minute ventilation to maintain normocapnia and watch for subcutaneous emphysema if gas tracks into tissue planes.

Key physiological effects of laparoscopic pneumoperitoneum: CO2 absorption → hypercarbia; raised intra-abdominal pressure → reduced venous return → possible hypotension; Trendelenburg position → diaphragmatic splinting. Gas embolism (rare but fatal) = sudden cardiovascular collapse during or after insufflation.

CO2 pneumoperitoneum causes systemic CO2 absorption → hypercarbia; combined with Trendelenburg-related ventilatory compromise, the anaesthetist must actively increase minute ventilation. This is a key physiological effect the observer should understand when watching the anaesthetic management during laparoscopy.

Correct. The definitive laparoscopic distinction is: (1) the fallopian tube has a fimbriated end visible at its lateral extremity near the ovary — this feature is unique; (2) the tube runs in the mesosalpinx (free edge of broad ligament); (3) the round ligament has no fimbriae and courses anterolaterally through the inguinal canal. A clip applied to the round ligament results in a failed sterilization — tracing the tube to its fimbriated end before clip application is mandatory.

Always trace the fallopian tube from the uterine cornua to the fimbriated end before applying a sterilization clip. The round ligament and tube both exit the uterus near the cornua and can appear similar without careful tracing. Clip on round ligament = failed sterilization.

The safest way to confirm the fallopian tube before clip application is to trace it from the cornua to its fimbriated end. The fimbria is the definitive landmark — the round ligament has no fimbriae. This verification step is mandatory to avoid a failed sterilization from misidentification.