CCS Integrated Cases

CCS case: ectopic pregnancy with hemoperitoneum

Clinical Overview and When to Suspect Ectopic Pregnancy with Hemoperitoneum

— Any reproductive-age woman with abdominal/pelvic pain + vaginal bleeding + amenorrhea until proven otherwise

— Syncope, shoulder-tip pain (diaphragmatic irritation from blood), or hemodynamic instability with a positive urine pregnancy test

— Known pregnancy of unknown location (PUL) with a falling, plateauing, or sub-optimally rising β-hCG

— Prior ectopic (recurrence ~10%)

— Prior tubal surgery, tubal ligation, or salpingitis (PID, chlamydia, gonorrhea)

— IUD in place at conception (relative risk for ectopic is high if pregnancy occurs)

— Assisted reproductive technology (IVF — also raises heterotopic risk to ~1:100)

— Smoking, age >35, endometriosis, DES exposure

Definition: Implantation of a fertilized ovum outside the endometrial cavity, most commonly in the fallopian tube (~96%, ampulla > isthmus > fimbria). Rupture with intraperitoneal hemorrhage is a life-threatening surgical emergency and a leading cause of first-trimester maternal mortality in the US.

Epidemiology: ~1-2% of all pregnancies; mortality has fallen sharply with β-hCG and transvaginal ultrasound (TVUS), but rupture still occurs when diagnosis is delayed or unsuspected.

When to suspect on the CCS clock:

Major risk factors:

Pathophysiology of hemoperitoneum: Trophoblast erodes into tubal serosa → tubal distention → rupture → brisk arterial/venous bleeding into peritoneum → hypovolemic shock. Blood is highly irritating, producing rebound, guarding, and referred shoulder pain (Kehr sign).

CCS pearl: On the CCS interface, the moment you see a reproductive-age woman with abdominal pain, your very first two orders are urine β-hCG and two large-bore IVs with type & crossmatch. Do not anchor on PID, appendicitis, or "dysfunctional bleeding" until pregnancy is excluded — missing ectopic is a classic Step 3 disaster pattern.

Presentation Patterns and Key History

— Typically presents at 6-8 weeks from LMP

— Pain is usually unilateral, cramping or sharp, may radiate to shoulder (subdiaphragmatic blood)

— Bleeding is often light/spotting, dark-brown ("prune juice"), but can be heavy

— Syncope, lightheadedness, near-syncope on standing → suspect rupture and hemoperitoneum

— Stable ectopic: mild pain, spotting, β-hCG positive, vitals normal → workup pathway

— Ruptured ectopic: severe pain, peritoneal signs, tachycardia, hypotension, syncope → straight to OR

— Heterotopic pregnancy: IUP confirmed on US but persistent pain/bleeding — think IVF patient

— Cervical/interstitial/cesarean scar: catastrophic bleeding when ruptured; need MFM/IR

— LMP, cycle regularity, contraception (IUD? tubal ligation?)

— Prior ectopic, PID, chlamydia, tubal surgery, infertility/ART

— Pain character, radiation (shoulder), syncope, dizziness with standing

— Quantify bleeding (pads/hr, clots, tissue passage)

— Last sexual activity, partner history, dyspareunia

— Syncope or near-syncope

— Shoulder pain (Kehr sign)

— Diaphoresis, pallor

— Worsening pain with movement

Classic triad (present in <50%): amenorrhea + vaginal bleeding + unilateral lower abdominal pain. Absence of the triad does NOT exclude ectopic.

Symptom timeline:

Presentation phenotypes on Step 3:

Targeted history questions (CCS interview menu):

Red flags pointing to rupture:

Key distinction: A threatened/incomplete miscarriage typically has heavier bleeding with passage of tissue and crampy midline pain, while ectopic classically has lighter bleeding but more lateralized, severe pain that is disproportionate to bleeding. Pain > bleeding ⇒ think ectopic.

Board pearl: Shoulder pain + positive pregnancy test + hypotension = ruptured ectopic until proven in the OR. Do not waste minutes on extensive imaging — surgical consult and resuscitation in parallel.

Physical Exam Findings and Hemodynamic Assessment

— Tachycardia (HR >100) often precedes hypotension in young women; healthy gravidas compensate well, then crash

— Orthostatic changes (≥20 mmHg systolic drop or ≥30 bpm pulse rise on standing) suggest significant volume loss

— SBP <90, narrow pulse pressure, cool extremities → Class III/IV hemorrhagic shock (>30% blood volume lost)

— Shock index (HR/SBP) >1.0 is a strong predictor of hemoperitoneum requiring transfusion

— Lower-quadrant tenderness, often unilateral

— Peritoneal signs (rebound, guarding, rigidity) suggest free intraperitoneal blood

— Distension with shifting dullness in massive hemoperitoneum

— Cullen sign (periumbilical bruising) — rare but classic late finding

— Cervical motion tenderness (positive "chandelier sign")

— Adnexal tenderness or palpable mass (may NOT be palpable due to pain/guarding)

— Closed cervical os with scant dark blood (vs. open os in inevitable abortion)

— Cul-de-sac fullness suggests pooled blood

— Vital signs q15min while unstable, q1h once resuscitated

— Continuous pulse oximetry and cardiac monitoring

— Strict I/Os with Foley catheter (urine output <0.5 mL/kg/hr = inadequate perfusion)

— Recheck abdominal exam q30min during initial workup — expanding hemoperitoneum changes the exam quickly

General appearance: Anxious, diaphoretic, pale if bleeding. A "well-appearing" patient can deteriorate within minutes — repeat vitals every 15 minutes until stable.

Vital signs — the most important data point:

Abdominal exam:

Pelvic exam (bimanual + speculum):

CCS pearl: On the CCS interface, order:

Key distinction: A stable bimanual exam without peritoneal signs in a hemodynamically normal patient allows time for TVUS and serial β-hCG. Peritoneal signs + tachycardia + positive β-hCG mandates immediate OR — do not wait for imaging confirmation.

Board pearl: Young patients maintain blood pressure until they suddenly don't. Trust the tachycardia. A HR of 115 in a 24-year-old with pelvic pain and positive β-hCG is hemoperitoneum until proven otherwise.

Diagnostic Workup — Initial Labs, Imaging, and Bedside Studies

— Two large-bore (16-18g) peripheral IVs

— Urine β-hCG (qualitative, fastest)

— Quantitative serum β-hCG

— CBC with differential (Hgb baseline — may be normal early in acute bleed)

— Type and crossmatch 2-4 units PRBCs (not just type & screen if unstable)

— Comprehensive metabolic panel, coagulation studies (PT/PTT/INR, fibrinogen)

— Blood type and Rh status (RhoGAM if Rh-negative)

— Lactate (marker of hypoperfusion)

— IV NS or LR bolus 1-2 L wide open if tachycardic/hypotensive

— NPO status, supplemental O2, continuous monitoring

— Transvaginal ultrasound (TVUS) is the imaging study of choice

— Order stat — should be at bedside within 30-60 minutes

— Look for: IUP (gestational sac with yolk sac ± fetal pole), adnexal mass, free fluid in cul-de-sac (suggests hemoperitoneum), "ring of fire" on Doppler of tubal mass

— Absence of IUP with β-hCG above discriminatory zone (~3,500 mIU/mL with TVUS) strongly suggests ectopic

— In unstable patients, free fluid in Morison pouch + positive β-hCG = ruptured ectopic → straight to OR; do not wait for formal TVUS

— Below discriminatory zone + no IUP = pregnancy of unknown location (PUL) → serial β-hCG every 48h

— Normal IUP: β-hCG rises ≥35-50% in 48h; suboptimal rise/plateau/fall suggests abnormal pregnancy (ectopic or failed IUP)

On arrival (time 0) — CCS initial order set:

Pelvic ultrasound — the cornerstone:

Bedside FAST exam:

β-hCG interpretation:

CCS pearl: Reassess at 1 hour — repeat vitals, check Hgb/lactate, review TVUS results, recalculate shock index. If TVUS shows no IUP + free fluid + tachycardia → call OB/GYN surgical consult immediately and move toward OR without further temporizing.

Board pearl: A single β-hCG cannot diagnose ectopic — interpretation requires β-hCG level + TVUS findings + clinical stability, not any one in isolation.

Diagnostic Workup — Advanced and Confirmatory Studies

— Repeat at 48 hours

— Normal IUP: rise ≥35% in 48h (lower threshold than older 66% rule)

— Plateau (<35% rise) or abnormal fall (<21% in 48h after presumed completed miscarriage) → highly suspicious for ectopic

— Step 3 management: Stable patient with non-diagnostic TVUS and rising-but-abnormal β-hCG → outpatient OB follow-up with repeat β-hCG and TVUS in 48h, strict return precautions

— Extrauterine gestational sac with yolk sac/embryo (definitive)

— Tubal ring sign / "bagel sign"

— Complex adnexal mass separate from ovary

— Echogenic free fluid in cul-de-sac (clotted blood)

— Pseudosac (fluid in endometrial cavity) — do NOT mistake for IUP; lacks double decidual sign

— <5 ng/mL → nonviable pregnancy (ectopic or failed IUP)

— >20 ng/mL → likely viable IUP

— Indeterminate range 5-20 ng/mL is unhelpful

— Gold standard when imaging and labs are inconclusive but suspicion remains high

— Also therapeutic (salpingostomy/salpingectomy)

— Historical; nonclotting blood from posterior cul-de-sac confirms hemoperitoneum

— Replaced by TVUS/FAST

— Not first-line; used only when diagnosis is unclear and other intra-abdominal pathology is being considered (e.g., appendicitis, ovarian torsion)

— Avoid radiation if pregnancy possible and TVUS is feasible

Serial quantitative β-hCG (for stable PUL):

TVUS findings that confirm ectopic:

Progesterone (adjunct, not standalone):

Diagnostic laparoscopy:

Culdocentesis (rarely used now):

CT imaging:

CCS pearl: Avoid over-ordering. On the CCS exam, TVUS + quantitative β-hCG + CBC + type & cross answers >90% of stable ectopic workups. Adding "CT abdomen/pelvis" to a clearly ectopic case wastes time and risks penalty points.

Key distinction: Heterotopic pregnancy (IUP + ectopic, ~1:30,000 spontaneous, 1:100 with IVF) — don't be falsely reassured by seeing an IUP in an IVF patient with persistent adnexal pain.

Risk Stratification and Management Logic

1. Is the patient hemodynamically stable?

2. Is the diagnosis of ectopic confirmed (vs. PUL)?

— Immediate surgical management, regardless of β-hCG level or imaging certainty

— Resuscitate in parallel with OR mobilization (don't sequence them)

— CCS orders: OB/GYN surgical consult STAT, OR booking, anesthesia consult, activate massive transfusion protocol if SBP <90 or Hgb <7

— Do NOT delay for serial β-hCG or methotrexate discussion

— Medical (methotrexate) vs surgical (laparoscopy) — shared decision-making

— Hemodynamically stable, no hemoperitoneum

— β-hCG <5,000 mIU/mL (best success <1,500; declines >5,000)

— Unruptured ectopic, mass <3.5-4 cm

— No fetal cardiac activity

— Reliable patient who can return for follow-up

— Normal LFTs, renal function, CBC

— No contraindications (see chunk 7)

— Unstable vitals or rupture

— β-hCG >5,000 mIU/mL

— Mass >4 cm or fetal cardiac activity

— Failed MTX

— Contraindication to MTX

— Patient preference / desires sterilization

— Heterotopic pregnancy (MTX would harm IUP)

— Serial β-hCG q48h + repeat TVUS until diagnosis declared

— Counsel on return precautions; ER if pain/syncope/heavy bleeding

— 0 min: Two IVs, β-hCG, type & cross, CBC, lactate, NS bolus

— 15 min: FAST/TVUS, OB consult, OR notified

— 30 min: Crossmatched blood available, MTP if needed

— 45-60 min: In OR for laparoscopic salpingectomy

The decision tree pivots on TWO questions:

Pathway A — Unstable patient (hemoperitoneum/shock):

Pathway B — Stable, confirmed ectopic:

Methotrexate (MTX) candidacy — ALL of:

Surgical candidacy — any of:

Pathway C — Pregnancy of unknown location (PUL), stable:

CCS pearl: Time-anchored sequence for ruptured ectopic with hemoperitoneum on the CCS clock:

Board pearl: Methotrexate is never the answer in a hypotensive patient. Surgery is reflexive in hemoperitoneum.

Pharmacotherapy — Methotrexate and Adjunctive Medications

— Mechanism: folate antagonist → inhibits DNA synthesis in rapidly dividing trophoblast

— Single-dose regimen (most common): 50 mg/m² IM on day 1

— Two-dose regimen: 50 mg/m² IM on days 0 and 4 (higher success at β-hCG 3,600-5,000)

— Multi-dose: alternating MTX 1 mg/kg IM and leucovorin 0.1 mg/kg IM days 1, 3, 5, 7 (rarely used)

— Check β-hCG on day 4 and day 7

— Success = ≥15% decline from day 4 to day 7

— If <15% decline → repeat dose of MTX or proceed to surgery

— Then weekly β-hCG until undetectable (typically 4-6 weeks, may take up to 8)

— Hemodynamic instability / ruptured ectopic

— Intrauterine pregnancy coexisting (heterotopic)

— Breastfeeding

— Immunodeficiency

— Hepatic, renal, or hematologic disease (AST/ALT >2x normal, Cr elevated, WBC <2k, plt <100k)

— Active pulmonary or peptic ulcer disease

— Hypersensitivity to MTX

— β-hCG >5,000 mIU/mL

— Fetal cardiac activity

— Ectopic mass >4 cm

— Patient unable to return for follow-up

— Avoid: folic acid supplements, NSAIDs, alcohol, sun exposure, sexual intercourse, gas-producing foods until β-hCG zero

— Expect "separation pain" day 2-7 (cramping) — concerning if severe/persistent

— Mild side effects: nausea, stomatitis, transient LFT elevation

— Wait at least 3 months before attempting next pregnancy (MTX teratogenicity)

— Anti-D immunoglobulin (RhoGAM) 50-300 mcg IM for all Rh-negative patients with ectopic — first trimester dose typically 50 mcg sufficient, but 300 mcg commonly used

Methotrexate (MTX) — first-line medical therapy for unruptured, stable ectopic:

MTX follow-up protocol (single-dose):

Absolute contraindications to MTX:

Relative contraindications:

Patient counseling (CCS counseling menu):

Rh prophylaxis:

Step 3 management: Stable ectopic, β-hCG 2,800, no fetal activity, 2.5 cm mass, normal labs → single-dose MTX + RhoGAM if Rh−, return for day 4/7 β-hCG with strict precautions for severe pain or syncope.

Surgical Management — Laparoscopy in the Bleeding Patient

— Salpingectomy (remove the affected tube): preferred when tube is ruptured, severely damaged, uncontrolled bleeding, prior ectopic in same tube, or completed childbearing

— Salpingostomy (linear incision, evacuate ectopic, leave tube): considered when contralateral tube is absent/damaged and fertility preservation is critical

— Persistent trophoblast in ~5-15% → must follow weekly β-hCG to zero

— Recurrent ectopic risk in same tube

— Some randomized data (ESEP trial) show no fertility benefit over salpingectomy when contralateral tube is healthy — current trend favors salpingectomy

— NPO, IV NS at 125 mL/hr (titrate to hemodynamics)

— Type & crossmatch 2-4 units PRBCs available in OR

— Pre-op antibiotic: cefazolin 2 g IV within 60 min of incision

— Consent including possibility of salpingectomy, conversion to laparotomy, transfusion, future fertility implications

— Massive transfusion protocol (MTP) activation if SBP <90, ongoing bleeding, Hgb <7: 1:1:1 ratio PRBC:FFP:platelets

— Foley catheter, sequential compression devices

— Vitals q4h, Hgb at 6h post-op

— RhoGAM if Rh-negative (if not already given)

— Pain control: acetaminophen + short-course oxycodone PRN; avoid NSAIDs only if MTX co-administered

— Early ambulation, regular diet as tolerated, DC Foley POD 0-1

Laparoscopy is preferred over laparotomy when hemodynamically feasible — less blood loss, shorter stay, faster recovery. Laparotomy reserved for massive hemoperitoneum with severe instability or inadequate visualization.

Two surgical options:

Salpingostomy caveats:

Perioperative CCS orders:

Intraoperative findings: hemoperitoneum (often 500-2000 mL), ruptured tube with active bleeding, clots. Evacuate blood, identify ectopic, achieve hemostasis, send specimen to pathology to confirm chorionic villi (rules out persistent ectopic elsewhere).

Post-op orders (day 0-1):

CCS pearl: After surgery, document chorionic villi on path. If villi NOT found, you have a persistent or undiagnosed pregnancy (possibly heterotopic or contralateral) — follow β-hCG to zero and consider repeat imaging.

Special Populations — Recurrent Ectopic, Comorbidities, and Pharmacologic Adjustments

— ~10% recurrence after one ectopic; ~25% after two

— Counsel early TVUS at 5-6 weeks in next pregnancy to confirm IUP location

— Prior salpingectomy does NOT eliminate risk — contralateral tube and uterine cornu (interstitial) ectopics still occur

— Consider IVF for definitive bypass of tubal pathology when both tubes are damaged

— MTX is renally cleared — contraindicated if Cr elevated or GFR significantly reduced

— Even mild renal impairment increases toxicity (myelosuppression, mucositis)

— Default to surgical management in renal disease

— If MTX is unavoidable, dose-reduce and monitor labs closely with nephrology input

— MTX is hepatotoxic — contraindicated with AST/ALT >2x ULN, active hepatitis, cirrhosis, heavy alcohol use

— Surgery preferred

— Avoid concurrent hepatotoxins: alcohol, acetaminophen >2 g/d, sulfonamides

— MTX contraindicated — additive myelosuppression and infection risk

— Surgical management preferred

— Coordinate with transplant/ID teams perioperatively

— Hold DOACs/warfarin per perioperative protocol; bridge if high-risk indication

— Reverse acutely if active hemoperitoneum: 4-factor PCC for warfarin, andexanet/idarucizumab for DOACs as indicated

— Resume anticoagulation 24-48h post-op once hemostasis confirmed

— Higher surgical complication rate; laparoscopy still preferred when feasible

— MTX dosed by BSA — no special adjustment

— NSAIDs, salicylates, PPIs, sulfonamides, penicillins, probenecid all reduce MTX clearance → toxicity

— Avoid trimethoprim (additive folate antagonism)

Recurrent ectopic pregnancy:

Renal impairment:

Hepatic impairment:

Immunocompromised patients (HIV with low CD4, transplant, chemo):

Anticoagulated patients:

Obesity:

Drug interactions with MTX:

Step 3 management: Patient with stable ectopic, β-hCG 1,200, but Cr 1.8 and AST 65 → surgical laparoscopic salpingectomy is preferred over MTX. Don't reflexively choose MTX just because hCG is low — always vet contraindications.

Board pearl: "Low β-hCG ≠ automatic MTX." Always check renal, hepatic, hematologic, and breastfeeding status first.

Special Populations — Adolescents, ART Patients, and Unusual Ectopic Sites

— Often delayed presentation due to concealed pregnancy, irregular cycles, fear of disclosure

— Higher rupture rate at presentation

— Confidentiality: Most states allow minors to consent to pregnancy-related care without parental notification — know your state law

— Screen for intimate partner violence and sexual abuse in any pregnant minor

— Ectopic risk 2-5% with IVF (higher than spontaneous baseline)

— Heterotopic risk ~1:100 with IVF vs ~1:30,000 spontaneous

— Key distinction: Seeing an IUP on TVUS does NOT exclude ectopic in IVF patients — always assess adnexa carefully

— If heterotopic confirmed, MTX is contraindicated (harms IUP) → surgical removal of ectopic with preservation of IUP

— Implants in intramural tube within uterine wall

— Presents later (7-12 weeks) because of myometrial distensibility

— Catastrophic rupture with massive hemorrhage from uterine artery branches

— Surgical management: cornuostomy or cornual resection; hysterectomy in severe cases

— Future pregnancies require C-section due to uterine wall integrity concerns

— Implants in endocervical canal; risk factors include prior D&C, Asherman syndrome

— Profuse painless bleeding

— Methotrexate (often multi-dose) preferred because surgery risks uncontrolled hemorrhage

— Uterine artery embolization or balloon tamponade as adjuncts; hysterectomy in refractory cases

— Implants in prior C-section scar niche

— Risk of uterine rupture, placenta accreta spectrum if continued

— Management: MTX, surgical excision, or UAE — refer to MFM

— Diagnosed often at surgery

— Abdominal ectopic can rarely progress to viability — high maternal mortality

Adolescents:

Assisted reproductive technology (ART) patients:

Interstitial (cornual) ectopic (~2-4%):

Cervical ectopic (~<1%):

Cesarean scar ectopic:

Ovarian and abdominal ectopics (rare, <1%):

CCS pearl: IVF patient with confirmed IUP at 7 weeks now presenting with unilateral pain and free fluid → think heterotopic, order TVUS focused on adnexa, OB consult, surgical management to save the IUP. Do not give MTX.

Complications and Adverse Outcomes

— Hemorrhagic shock (Class III/IV) with end-organ hypoperfusion

— Disseminated intravascular coagulation (DIC) from massive transfusion or prolonged shock

— Acute kidney injury (prerenal → ATN)

— Death — rare with modern care but still occurs, especially in delayed presentation

— Bleeding, infection, injury to bowel/bladder/ureter

— Conversion from laparoscopy to laparotomy

— Adhesion formation → future infertility, chronic pelvic pain

— Persistent trophoblast after salpingostomy (5-15%) — requires weekly β-hCG to zero, may need MTX rescue

— Anesthesia complications, VTE

— Treatment failure / rupture during therapy (~7-14%) — counsel patient on warning signs

— Hepatotoxicity (transient LFT elevation)

— Bone marrow suppression

— Mucositis, stomatitis, alopecia (mild)

— Pneumonitis (rare)

— Separation pain day 2-7 — distinguish from rupture (rupture pain is severe, persistent, with hemodynamic change)

— TRALI, TACO, hemolytic reactions

— Citrate toxicity (hypocalcemia) with massive transfusion → give IV calcium gluconate

— Hypothermia, coagulopathy — keep patient warm, monitor coags

— Future fertility ~65% intrauterine pregnancy rate after one ectopic

— ~10% recurrent ectopic risk

— Psychological: grief, anxiety in future pregnancies — offer counseling

— Day 4 β-hCG: baseline for comparison (may rise initially — don't panic)

— Day 7 β-hCG: must drop ≥15% from day 4

— Concurrent worsening pain + hypotension at any point → STOP medical management, go to OR

— Reassure patient that mild day 2-7 cramping is expected; severe pain is not

Acute complications of ruptured ectopic:

Surgical complications:

Methotrexate complications:

Transfusion complications:

Reproductive sequelae:

Rh sensitization if RhoGAM omitted in Rh-negative patient → future pregnancy complications (hemolytic disease of the newborn)

CCS pearl: When monitoring MTX therapy on the CCS clock:

Board pearl: A patient on MTX who develops acute severe pain, syncope, or hypotension is rupturing — do not attribute to "separation pain."

When to Escalate — ICU, Consults, and Massive Transfusion Protocol

— Confirmed or suspected ruptured ectopic

— Hemodynamic instability with positive β-hCG

— β-hCG >5,000 or ectopic mass >4 cm or fetal cardiac activity

— Failed MTX (β-hCG not declining ≥15% day 4-7)

— Non-tubal ectopic (cervical, interstitial, cesarean scar)

— Heterotopic pregnancy

— Post-resuscitation hemodynamic instability requiring vasopressors

— Massive transfusion (>4 units PRBC in 1 hour or >10 units in 24h)

— DIC, AKI, or other end-organ dysfunction

— Mechanical ventilation

— Severe metabolic acidosis (lactate >4)

— SBP <90 with ongoing hemorrhage

— Shock index >1.4

— ABC score ≥2 (penetrating mechanism, SBP <90, HR >120, positive FAST)

— Anticipated need >4 units in 1h

— PRBC:FFP:platelets in 1:1:1 ratio

— Cryoprecipitate if fibrinogen <200 mg/dL (especially in obstetric hemorrhage where fibrinogen targets are higher: >200 mg/dL)

— Tranexamic acid (TXA) 1 g IV within 3 hours — reduces mortality in obstetric hemorrhage

— IV calcium gluconate 1-2 g per 4 units PRBC to prevent citrate toxicity

— Maintain temperature >36°C, pH >7.2, ionized Ca >1.1, K within normal

— 0 min: ER, IVs, labs, NS bolus, OB consult

— 15 min: FAST positive, BP 80/50 → activate MTP, mobilize OR

— 30 min: First units PRBC/FFP transfusing, TXA 1g IV, anesthesia at bedside

— 45 min: In OR

— Post-op: ICU for hemodynamic monitoring, serial Hgb, lactate clearance

Immediate OB/GYN surgical consult criteria:

Anesthesia consult: All surgical cases — for emergent airway, fluid resuscitation, vasopressor management

Interventional radiology consult: Cervical or cesarean scar ectopic considering uterine artery embolization

MFM consult: Heterotopic pregnancy, interstitial/cornual ectopic, cesarean scar ectopic

ICU admission criteria:

Massive Transfusion Protocol (MTP) — activation triggers:

MTP composition:

Time-anchored CCS escalation example:

CCS pearl: Don't wait for "definitive" hypotension to call consults — early surgical consult on the suspicion alone is the Step 3-correct move.

Key Differentials — Other Obstetric and Gynecologic Causes

— Positive β-hCG, vaginal bleeding, crampy midline pain

— Open cervical os (inevitable/incomplete), tissue passage

— TVUS: IUP present (may be nonviable), no adnexal mass, no significant free fluid

— Management: expectant, medical (misoprostol), or surgical (D&C); RhoGAM if Rh−

— β-hCG abnormally high (often >100,000)

— Hyperemesis, early preeclampsia (<20 weeks), uterus large for dates

— TVUS: "snowstorm" or cystic uterine pattern, no fetus (complete mole) or abnormal fetus (partial)

— Management: suction D&C, weekly β-hCG to zero, contraception 6-12 months, monitor for choriocarcinoma

— Sudden unilateral pain, often mid-cycle or in early pregnancy

— β-hCG may be positive if early pregnancy (corpus luteum of pregnancy)

— TVUS: complex adnexal cyst, free fluid possible

— Usually self-limited; surgery only if hemodynamically unstable or large hemoperitoneum

— Severe, sudden, intermittent unilateral pelvic pain, nausea/vomiting

— TVUS with Doppler: enlarged ovary, absent/reduced flow, "whirlpool sign"

— Surgical emergency — detorsion, oophoropexy

— Bilateral lower abdominal pain, cervical motion tenderness, fever, mucopurulent discharge

— Negative β-hCG distinguishes from ectopic

— Treat: ceftriaxone 500 mg IM + doxycycline 100 mg PO BID × 14 days ± metronidazole

— Fever, adnexal mass, peritoneal signs

— TVUS/CT: complex adnexal mass with septations

— IV antibiotics; drainage if >7 cm or no response in 48-72h

— Chronic dysmenorrhea history, acute pain with rupture

— TVUS: "chocolate cyst" appearance

Threatened/incomplete/inevitable abortion:

Molar pregnancy (gestational trophoblastic disease):

Ruptured ovarian cyst (hemorrhagic corpus luteum):

Ovarian torsion:

Pelvic inflammatory disease (PID):

Tubo-ovarian abscess (TOA):

Endometriosis with hemorrhagic endometrioma rupture:

Key distinction: Always order β-hCG first. A negative β-hCG eliminates ectopic, molar pregnancy, and pregnancy-related miscarriage in one stroke — narrowing the differential dramatically.

Board pearl: CMT + fever + discharge + negative β-hCG = PID. CMT + amenorrhea + positive β-hCG = ectopic. Pattern recognition saves time.

Key Differentials — Non-Gynecologic Causes of Acute Abdomen

— Periumbilical pain migrating to RLQ, anorexia, low-grade fever, leukocytosis

— McBurney point tenderness, Rovsing/psoas/obturator signs

— In pregnancy, appendix displaces cephalad; pain may be RUQ in third trimester

— Imaging: ultrasound first in pregnancy; MRI without gadolinium if unclear; CT if non-pregnant

— Surgical: laparoscopic appendectomy

— Pyelonephritis: flank pain, CVA tenderness, fever, dysuria, pyuria — UA + urine culture

— Nephrolithiasis: colicky flank-to-groin pain, hematuria — non-contrast CT (or ultrasound in pregnancy)

— Older patients typically; LLQ pain, fever

— CT shows diverticular inflammation with fat stranding

— "Pain out of proportion to exam," elderly with afib or vascular disease

— Lactic acidosis, CT angiography diagnostic

— Sudden epigastric pain, rigid abdomen, free air on upright CXR

— Epigastric pain radiating to back, elevated lipase

— Etiologies: gallstones, alcohol

— Older men, hypotension, pulsatile abdominal mass, back/flank pain

— Bedside ultrasound, emergent vascular surgery

— RUQ pain, Murphy sign, leukocytosis

— RUQ ultrasound: gallstones, wall thickening, pericholecystic fluid

— LUQ pain, Kehr sign (referred shoulder pain — same as ectopic!)

— Hemoperitoneum on FAST

Appendicitis:

Urinary tract pathology:

Diverticulitis:

Mesenteric ischemia:

Perforated peptic ulcer:

Pancreatitis:

AAA rupture:

Cholecystitis:

Splenic rupture (mononucleosis, trauma):

Key distinction: Kehr sign (left shoulder pain) classically suggests splenic injury; right shoulder pain from diaphragmatic irritation can occur with ruptured ectopic, ruptured liver hematoma (HELLP), or perforated viscus. Always interpret with β-hCG.

CCS pearl: When the CCS case looks like "abdominal pain in a young woman," your first three orders are: β-hCG, CBC, urinalysis. These three studies redirect 90% of differentials within 15 minutes.

Step 3 management: Do not anchor on the most exciting diagnosis. A woman with RLQ pain and positive β-hCG could have ectopic OR appendicitis with coincident pregnancy — TVUS adnexa + targeted ultrasound of appendix may both be needed.

Secondary Prevention, Discharge Medications, and Long-Term Plan

— Anti-D immunoglobulin (RhoGAM) if Rh-negative, confirm given before discharge

— Iron supplementation (ferrous sulfate 325 mg daily-BID) if Hgb <11 or significant blood loss

— Acetaminophen for pain control; avoid NSAIDs if on MTX (decrease MTX clearance, toxicity)

— Short-course opioids (oxycodone 5 mg q4-6h PRN) only as needed post-surgery

— Stool softener (docusate) with opioids

— Avoid folic acid supplements until β-hCG zero if on MTX

— Avoid alcohol, sun exposure, intercourse, gas-producing foods while on MTX

— Wait at least 3 months after MTX before next pregnancy (teratogenicity, folate stores)

— After salpingectomy, conception may be attempted once medically cleared (typically 1-2 cycles)

— Avoid IUD if prior ectopic was associated with IUD failure; otherwise IUD is still acceptable

— Counsel on early prenatal care and early TVUS at 5-6 weeks in next pregnancy to localize implantation

— Discuss reliable contraception during the wait period: combined OCPs, progestin-only, depot medroxyprogesterone, implant

— Smoking cessation — strongly increases ectopic risk; offer nicotine replacement, varenicline, counseling

— STI screening and treatment for chlamydia, gonorrhea; partner notification and treatment

— Annual STI screening if risk factors persist

— Address infertility evaluation if applicable

— Warning signs requiring ER return: severe pain, syncope, heavy bleeding, fever

— Expected normal: light spotting for 1-2 weeks, mild cramping, fatigue

— Emotional health resources: pregnancy loss support groups, mental health referral

Discharge medication checklist (post-surgical or post-MTX):

Contraception counseling (critical discharge order):

Risk factor modification:

Patient education materials:

Step 3 management: A 28-year-old s/p salpingectomy for ruptured ectopic, Rh-negative, smoker — discharge plan: RhoGAM administered, iron supplementation, smoking cessation counseling with pharmacotherapy offered, STI screening if not recent, contraception until ready to conceive, OB follow-up in 1-2 weeks, mental health screening.

Board pearl: Skipping smoking cessation counseling on a patient with ectopic is a Step 3 trap — it's the single most modifiable risk factor for recurrence.

Follow-Up, Monitoring, and Outpatient Handoff

— Day 4: β-hCG (establishes baseline before expected decline)

— Day 7: β-hCG (must show ≥15% decline from day 4)

— If <15% decline: repeat MTX dose OR surgery; reassess clinically

— Weekly β-hCG until undetectable (<5 mIU/mL), typically 4-6 weeks but may take up to 8

— Phone check-in at 48-72h for symptom screening

— Office visit at 1-2 weeks with OB/GYN

— Office visit at 1-2 weeks for wound check, pathology review (confirm chorionic villi)

— β-hCG only if villi NOT confirmed on path or if salpingostomy performed

— No further β-hCG needed if salpingectomy with confirmed villi

— Weekly β-hCG until undetectable to rule out persistent trophoblast

— ~5-15% require MTX rescue or repeat surgery

— 6-week postoperative OB visit: wound healing, contraception confirmation, emotional health

— 3-month visit: if MTX, confirm β-hCG zero, discuss conception timing

— Refer to infertility specialist if no conception after 6-12 months attempt

— Symptom resolution (pain, bleeding)

— Return of normal menses (typically 4-6 weeks)

— CBC at 4 weeks if significant anemia at discharge

— Mental health screening — PHQ-9 at follow-up visits

— Discharge summary to PCP and OB/GYN within 48h

— Clear documentation of: pathology results, Rh status, RhoGAM given, MTX dose/dates, β-hCG trend, contraception plan, next pregnancy counseling, smoking cessation discussion

— Closed-loop communication: confirm patient has follow-up appointment scheduled before discharge

— Resume light activity in 1-2 weeks post-surgery

— Pelvic rest (no intercourse, tampons) for 2 weeks

— Counseling/grief support — pregnancy loss is a real loss, even if early; offer resources

— Future pregnancy plan: early TVUS at 5-6 weeks to confirm IUP location

Post-MTX follow-up cadence:

Post-salpingectomy follow-up:

Post-salpingostomy follow-up:

Long-term reproductive health:

Monitoring parameters to track outpatient:

Outpatient handoff requirements:

Rehabilitation and counseling:

CCS pearl: On the CCS interface, the "office follow-up at 1 week" appointment is where you order the day-7 β-hCG, screen for ongoing pain, reinforce return precautions, and document mental health status. Don't forget to schedule it.

Board pearl: Discharge without scheduled β-hCG follow-up after MTX is a safety-event-level error.

Ethical, Legal, and Patient Safety Considerations

— Document discussion of medical vs surgical options, risks of each, success rates, future fertility implications

— Salpingectomy decision: implications for future natural conception — discuss with patient even in emergency settings if she is awake and able

— Emergency consent doctrine applies in ruptured ectopic with shock: implied consent for life-saving surgery if patient cannot consent and no surrogate available — document the emergency clearly

— Two-physician documentation may be required in some institutions for emergency surgery without consent

— Most US states allow minors to consent independently for pregnancy-related care, STI testing, and contraception without parental notification

— Know your state's specific laws — Step 3 may test the principle, not specific state nuances

— Maintain confidentiality unless safety concern (abuse, suicidality) triggers reporting

— Suspected sexual abuse in a minor → child protective services

— Intimate partner violence — offer resources; reporting requirements vary by state

— Screen all patients with pregnancy-related visits for IPV (USPSTF recommendation)

— Some patients may decline MTX due to perception of "ending pregnancy" — explain that ectopic is never viable and treatment is medically necessary for maternal survival

— Jehovah's Witnesses and blood products: Discuss in advance; document refusal; offer cell salvage, IV iron, erythropoietin alternatives; consider transfer to facility with bloodless surgery expertise if elective

— ER → OR: communicate vitals, blood products available, β-hCG, allergies

— OR → PACU → floor: communicate intraoperative findings, EBL, post-op orders

— Inpatient → outpatient: closed-loop discharge with confirmed follow-up appointment, β-hCG plan, RhoGAM documentation, contraception counseling

— β-hCG on every reproductive-age woman with abdominal pain — a universal precaution that prevents missed ectopic

— Avoid anchoring bias (don't dismiss as "PID" or "miscarriage" without TVUS confirmation)

— Document return precautions explicitly

Informed consent — special considerations:

Adolescent and minor consent:

Mandatory reporting obligations:

Religious and cultural considerations:

Transitions of care — high-risk handoff points:

Diagnostic error prevention:

Step 3 management: Hemodynamically unstable patient with ruptured ectopic, unconscious, no family available → proceed with emergency surgery under implied consent, document clearly, notify family as soon as possible. Delaying surgery for consent in this scenario violates standard of care.

Board pearl: Missed ectopic is one of the most common causes of OB/GYN malpractice claims. Universal β-hCG testing is your insurance.

High-Yield Associations and Rapid-Fire Clinical Facts

— Immunodeficiency

— Hepatic disease

— Active ulcer disease

— Breastfeeding

— Intrauterine pregnancy coexisting

— Thrombocytopenia / blood dyscrasia

— Pulmonary disease (active) / renal disease

β-hCG discriminatory zone: ~3,500 mIU/mL with TVUS, ~6,500 with transabdominal — above this with no IUP visualized, ectopic is likely

Normal β-hCG doubling time: ≥35-50% rise in 48 hours in viable IUP

Most common location of ectopic: Ampulla of fallopian tube (~70%)

Most dangerous location: Interstitial (cornual) — late, catastrophic rupture from uterine artery branches

Heterotopic pregnancy rates: ~1:30,000 spontaneous; ~1:100 with IVF

Recurrence risk: ~10% after one ectopic; ~25% after two

MTX success rate: ~90% in well-selected single-dose candidates

Tubal preservation: Salpingostomy does NOT improve future fertility vs salpingectomy when contralateral tube is healthy (ESEP trial)

Persistent trophoblast after salpingostomy: ~5-15% — requires β-hCG surveillance

RhoGAM dose first trimester: 50 mcg IM (some institutions use 300 mcg)

MTX day 4-7 β-hCG decline requirement: ≥15%

Wait period before next pregnancy after MTX: ≥3 months

Kehr sign: Shoulder pain from diaphragmatic blood irritation — classic for ruptured ectopic (also splenic rupture)

Pseudosac: Endometrial fluid collection in ectopic; lacks double decidual sign; do NOT mistake for IUP

Ring of fire on Doppler: Hypervascular ring around adnexal mass — suggests ectopic (or corpus luteum)

TXA in obstetric hemorrhage: 1 g IV within 3 hours — reduces mortality (WOMAN trial)

Smoking and ectopic: Dose-dependent increase in risk (~2-4×)

IUD and ectopic: If pregnancy occurs with IUD in place, ~50% of those pregnancies are ectopic — high suspicion

PID/chlamydia and ectopic: Tubal scarring increases risk 7-10× after PID

Methotrexate contraindications mnemonic "I HABIT-P":

Board pearl: "Positive β-hCG + no IUP on TVUS + adnexal mass + free fluid + tachycardia" is the canonical Step 3 ectopic-with-hemoperitoneum vignette. The answer is immediate laparoscopic salpingectomy — not MTX, not CT, not serial labs.

Key distinction: A pseudosac has a single decidual layer; a true gestational sac has a double decidual sign and ultimately a yolk sac.

Board Question Stem Patterns

"A 27-year-old G2P1 presents with 6 hours of severe left lower quadrant pain and one episode of syncope. LMP 7 weeks ago. BP 82/54, HR 128. Urine β-hCG positive. FAST shows free fluid in Morison pouch. TVUS shows no IUP and a left adnexal mass."

→ Answer: Immediate laparoscopic salpingectomy with IV resuscitation and crossmatched blood. NOT methotrexate, NOT CT scan.

"A 30-year-old with LMP 6 weeks ago presents with mild RLQ pain and spotting. β-hCG 2,100. TVUS: no IUP, 2 cm right adnexal mass, no fetal cardiac activity, scant free fluid. Vitals normal. Normal LFTs, Cr, CBC."

→ Answer: Single-dose methotrexate 50 mg/m² IM + RhoGAM if Rh−; day 4 and day 7 β-hCG follow-up.

"Patient s/p single-dose MTX for ectopic; day 4 β-hCG 2,800, day 7 β-hCG 2,650 (5% decline). She remains stable with mild pain."

→ Answer: Repeat MTX dose OR proceed to surgery (decline <15%). Both acceptable; surgery if unable to tolerate continued surveillance.

"31-year-old s/p IVF, TVUS at 7 weeks shows IUP with fetal cardiac activity; she now returns with right pelvic pain and free fluid in cul-de-sac. Right adnexal mass noted."

→ Answer: Laparoscopic surgical removal of the ectopic; MTX contraindicated due to coexisting IUP.

"22-year-old with LMP 5 weeks ago, β-hCG 1,200 on day 1, 1,350 on day 3 (12% rise). TVUS non-diagnostic. Stable."

→ Answer: Suboptimal rise suggests abnormal pregnancy; close OB follow-up with repeat β-hCG and TVUS, strict return precautions. Consider uterine aspiration or empirical MTX per protocols.

"29-year-old, LMP 10 weeks ago, presents with severe abdominal pain and shock. TVUS shows gestational sac surrounded by thin myometrium at the uterine cornu."

→ Answer: Emergency laparotomy or laparoscopy for cornual resection; activate MTP.

"16-year-old presents with abdominal pain and positive β-hCG; ectopic confirmed. Parents in waiting room demand information."

→ Answer: Maintain confidentiality; obtain consent from the minor; provide medical care; encourage but do not force disclosure.

Stem 1 — Classic ruptured ectopic:

Stem 2 — Stable ectopic, MTX candidate:

Stem 3 — MTX failure:

Stem 4 — Heterotopic in IVF:

Stem 5 — PUL with abnormal β-hCG trend:

Stem 6 — Interstitial ectopic:

Stem 7 — Adolescent confidentiality:

CCS pearl: Board stems testing ectopic typically pivot on stability + β-hCG level + imaging findings. Memorize the algorithm so you can move through the decision tree in seconds.

Board pearl: When the stem includes the words "syncope" or "shoulder pain" with positive pregnancy test — the answer almost always involves the operating room, not the lab.

One-Line Recap

Ectopic pregnancy with hemoperitoneum is a positive β-hCG in a reproductive-age woman with abdominal pain and hemodynamic instability — diagnose with TVUS and FAST, resuscitate with two large-bore IVs and crossmatched blood, and proceed immediately to laparoscopic salpingectomy without delay for medical management.

— Universal β-hCG in all reproductive-age women with abdominal pain

— TVUS is the imaging gold standard; FAST identifies hemoperitoneum at bedside

— Empty uterus + β-hCG above discriminatory zone (~3,500) + adnexal mass + free fluid = ectopic with hemoperitoneum until proven otherwise

— Unstable / ruptured: OR for laparoscopic salpingectomy; activate MTP if SBP <90 or Hgb <7; TXA 1g IV within 3h; cefazolin 2g pre-op

— Stable, unruptured, β-hCG <5,000, no FCA, mass <4cm, normal labs, reliable patient: single-dose MTX 50 mg/m² IM with day 4 and day 7 β-hCG (≥15% decline required)

— Heterotopic pregnancy (IVF) → surgery, never MTX

— Interstitial/cornual/cervical/scar ectopics → MFM and tailored approach

— Rh-negative → RhoGAM

— Adolescent → confidentiality preserved

— RhoGAM documented, iron repletion, contraception ≥3 months if MTX, early TVUS in next pregnancy, smoking cessation, STI screening, mental health support, scheduled follow-up with closed-loop communication

— Don't give MTX to an unstable patient; don't anchor on PID or miscarriage without TVUS; don't skip β-hCG; don't discharge without follow-up scheduled.

Diagnostic core:

Management dichotomy:

Special situations to recognize:

Discharge essentials:

The Step 3 trap to avoid:

Board pearl: β-hCG + TVUS + vitals answers nearly every ectopic question on Step 3 — master those three, and the rest is execution.