Certified Registered Nurse First Assistant (CRNFA) — Questions and Answers

Question 1: A ligating clip should be placed at what minimum distance from the planned transection point to ensure secure hemostasis?

5 mm or more
0.5 mm
2–3 mm (Correct answer)
1 mm

Correct answer: 2–3 mm

Clips should be placed at least 2–3 mm from the transection site to allow a secure bite of tissue and prevent slippage off the vessel end.

Question 2: A retention (stay) suture is used in abdominal closure primarily for which purpose?

Cosmetic skin closure
To secure drains in place
To approximate subcutaneous fat only
To add supplemental strength in high-risk patients prone to dehiscence (Correct answer)

Correct answer: To add supplemental strength in high-risk patients prone to dehiscence

Retention sutures are large, through-and-through sutures placed to provide additional fascial support in obese, malnourished, or immunocompromised patients at high risk for wound dehiscence.

Question 3: When a patient is placed in the steep Trendelenburg position for robotic pelvic surgery, which physiologic change should the CRNFA anticipate and assist the anesthesia team in managing?

Decreased cardiac output and hypotension
Decreased intracranial pressure
Increased airway pressures and decreased functional residual capacity requiring ventilator adjustments (Correct answer)
Peripheral vasodilation and hypothermia

Correct answer: Increased airway pressures and decreased functional residual capacity requiring ventilator adjustments

Steep Trendelenburg shifts abdominal contents cephalad, compressing the diaphragm, increasing airway pressures, decreasing FRC, and requiring higher ventilator pressures to maintain adequate oxygenation.

Question 4: Which blood supply to the sigmoid colon is most commonly divided during sigmoid colectomy?

Right colic artery
Superior rectal artery only
Inferior mesenteric artery branches (sigmoid arteries) (Correct answer)
Middle colic artery

Correct answer: Inferior mesenteric artery branches (sigmoid arteries)

The sigmoid colon is supplied by sigmoid arteries (sigmoidal branches of the inferior mesenteric artery) which are divided during sigmoid colectomy.

Question 5: Which nerve is at risk during a mastectomy and, if injured, causes 'winged scapula'?

Medial pectoral nerve
Intercostobrachial nerve
Thoracodorsal nerve
Long thoracic nerve (Correct answer)

Correct answer: Long thoracic nerve

Injury to the long thoracic nerve during mastectomy denervates the serratus anterior muscle, causing the medial scapular border to wing outward.

Question 6: Which type of needle holder is most appropriate when suturing delicate cardiovascular tissue?

Crile-Wood needle holder
Hegar needle holder
Castroviejo needle holder (Correct answer)
Mayo-Hegar needle holder

Correct answer: Castroviejo needle holder

The Castroviejo needle holder is a fine, spring-loaded instrument designed for delicate cardiovascular and ophthalmic suturing.

Question 7: During a right colectomy, which structure lies in close proximity to the ileocolic vessels and must be identified to avoid injury?

Right gonadal vein
Superior mesenteric vein
Right renal vein
Right ureter (Correct answer)

Correct answer: Right ureter

The right ureter runs retroperitoneally along the psoas muscle near the ileocolic vessels and must be identified before ligation during right colectomy.

Question 8: Wound dehiscence involving complete separation of all tissue layers with bowel protruding is termed what, and what is the immediate nursing action?

Fistula formation; apply wound drainage bag
Seroma; aspirate fluid and apply pressure dressing
Dehiscence; apply an abdominal binder and monitor
Evisceration; cover with a sterile saline-moistened dressing and notify surgeon immediately (Correct answer)

Correct answer: Evisceration; cover with a sterile saline-moistened dressing and notify surgeon immediately

Evisceration is the life-threatening protrusion of abdominal contents through a wound; the immediate action is to cover with sterile saline-moistened gauze and emergently notify the surgeon for return to OR.

Question 9: Which statement regarding DFV (deficient fluid volume) is the most accurate?

This is an imbalance caused by the patients condition
None of the answers below
This is an imbalance caused by too much heat
This is an imbalance in the isotonic body fluids (Correct answer)

Correct answer: This is an imbalance in the isotonic body fluids

Deficient Fluid Volume (DFV), often referred to as hypovolemia or isotonic dehydration, occurs when there is a proportional loss of both water and electrolytes from the extracellular fluid compartment. This leads to a decrease in the total circulating blood volume without a significant shift in fluid between intracellular and extracellular spaces. It is characterized by a reduction in isotonic body fluids, impacting overall fluid balance and organ perfusion.

Question 10: When closing a laparotomy fascial layer, which suture placement technique is recommended to reduce the risk of wound dehiscence?

Running locking sutures placed as close to the edge as possible
Simple interrupted sutures placed 1 cm apart and 1 cm from the edge
Figure-of-eight sutures placed 2 cm from the edge
Small bites technique — sutures placed 5 mm from edge and 5 mm apart in a continuous fashion (Correct answer)

Correct answer: Small bites technique — sutures placed 5 mm from edge and 5 mm apart in a continuous fashion

The small bites technique (STITCH trial) using 5 mm bite size and 5 mm spacing in a running fashion significantly reduces incisional hernia and dehiscence compared to large bites.

Question 11: Which fascial layer of the neck must be incised during central venous catheter insertion via the internal jugular approach?

Buccopharyngeal fascia
Superficial cervical fascia
Prevertebral fascia
Investing layer of deep cervical fascia (Correct answer)

Correct answer: Investing layer of deep cervical fascia

The investing layer of the deep cervical fascia encloses the sternocleidomastoid muscle and must be penetrated to access the internal jugular vein.

Question 12: Which preoperative information is most relevant when preparing the back table and anticipating intraoperative needs for a trauma patient?

Mechanism of injury, estimated blood loss, and suspected injuries from imaging (Correct answer)
Patient's prior surgical history only
Insurance authorization status
Patient's smoking history

Correct answer: Mechanism of injury, estimated blood loss, and suspected injuries from imaging

Mechanism of injury, estimated blood loss, and imaging findings guide the surgical team in preparing for damage control procedures, vascular instruments, and blood products.

Question 13: Which patient factor is the single greatest systemic risk factor for surgical site infection?

Obesity (BMI > 30)
Uncontrolled diabetes mellitus (HbA1c > 8%) (Correct answer)
Smoking within the past year
Age over 65

Correct answer: Uncontrolled diabetes mellitus (HbA1c > 8%)

Uncontrolled diabetes mellitus impairs leukocyte function, reduces tissue perfusion, and provides a glucose-rich environment for bacterial growth, making it the strongest systemic SSI risk factor.

Question 14: A patient reports a prior reaction to a 'caine' medication at the dentist. The CRNFA should prioritize communicating which concern to the anesthesia team?

Risk of malignant hyperthermia
Possible allergy to amide or ester local anesthetics (Correct answer)
Need for antihistamine premedication only
Contraindication to general anesthesia

Correct answer: Possible allergy to amide or ester local anesthetics

A prior reaction to local anesthetics used in dentistry may indicate allergy to amide or ester class agents, which must be clarified before administering local or regional anesthesia.

Question 15: Intraoperative awareness (unintended consciousness during general anesthesia) is most effectively monitored using which technology?

Heart rate and blood pressure monitoring alone
End-tidal CO2 capnography
Pulse oximetry
Bispectral Index (BIS) monitor measuring processed EEG (Correct answer)

Correct answer: Bispectral Index (BIS) monitor measuring processed EEG

The Bispectral Index (BIS) processes EEG signals to provide a numerical depth-of-anesthesia estimate, with values of 40–60 indicating adequate anesthesia for most surgical procedures.

Question 16: Which volatile anesthetic agent is most strongly associated with triggering malignant hyperthermia in susceptible patients?

Succinylcholine and all volatile halogenated agents (e.g., sevoflurane, desflurane) (Correct answer)
Ketamine
Propofol
Nitrous oxide

Correct answer: Succinylcholine and all volatile halogenated agents (e.g., sevoflurane, desflurane)

Malignant hyperthermia is triggered by succinylcholine and all halogenated volatile anesthetic agents; nitrous oxide, propofol, and ketamine are safe in MH-susceptible patients.

Question 17: Which vessel-sealing device uses bipolar energy combined with pressure to create a permanent seal on vessels up to 7 mm in diameter?

Harmonic scalpel
Argon beam coagulator
LigaSure (Correct answer)
Monopolar ESU pencil

Correct answer: LigaSure

LigaSure uses bipolar radiofrequency energy and mechanical pressure to denature collagen and elastin, creating a permanent seal on vessels up to 7 mm.

Question 18: When passing a sharp instrument to the surgeon on the sterile field, the CRNFA should use which safety technique?

Hand the instrument directly handle-first with the blade pointing toward the surgeon
Announce 'sharp passing' and hand directly with the tip covered
Place the instrument in a neutral zone (kidney basin) for the surgeon to pick up (Correct answer)
Pass sharp instruments only when the surgeon requests verbally

Correct answer: Place the instrument in a neutral zone (kidney basin) for the surgeon to pick up

The neutral zone (hands-free) technique places sharps in a designated zone for the surgeon to retrieve, preventing direct hand-to-hand transfer and reducing needlestick injuries.

Question 19: When reviewing the preoperative checklist, which item related to NPO status is most critical for patient safety?

Patient had a full meal 2 hours before surgery (Correct answer)
Patient drank 8 oz of clear liquids 4 hours ago per enhanced recovery protocol
Patient consumed a light meal 8 hours ago
Patient has been NPO for 3 hours for solids

Correct answer: Patient had a full meal 2 hours before surgery

A full meal within 2 hours of surgery violates NPO guidelines (8 hours for solids) and places the patient at high risk for aspiration pneumonia under anesthesia.

Question 20: What does the Chvostek symbol mean?

Poor state of nutrition
Observing for facial movement
minimum of 3 inches, maximum of 6 inches
Clinical signs of hypocalcemia (Correct answer)

Correct answer: Clinical signs of hypocalcemia

Chvostek's sign is a clinical test used to assess for hypocalcemia, which is an abnormally low level of calcium in the blood. The sign is positive if a twitching of the facial muscles occurs when the facial nerve is tapped anterior to the earlobe. This involuntary twitching indicates neuromuscular irritability caused by the low calcium levels, making it a key indicator of this electrolyte imbalance.

Question 21: A patient receiving epidural analgesia develops sudden hypotension, bradycardia, and respiratory distress after a bolus dose. The CRNFA should recognize this as which complication?

Opioid-induced respiratory depression
Epidural hematoma
Total spinal (high spinal block with hemodynamic collapse) (Correct answer)
Anaphylaxis to the local anesthetic

Correct answer: Total spinal (high spinal block with hemodynamic collapse)

Total spinal (accidental intrathecal injection of an epidural dose) causes rapid-onset profound hypotension, bradycardia, and respiratory failure requiring immediate vasopressor and airway support.

Question 22: When the CRNFA notes that the ESU active electrode is in contact with a retractor touching a different tissue plane than intended, which hazard is present?

Generator overload
Alternate site burn (direct coupling) through the unintended tissue contact (Correct answer)
Laser plume exposure
Patient plate burn

Correct answer: Alternate site burn (direct coupling) through the unintended tissue contact

Direct coupling occurs when the active electrode inadvertently contacts a metal retractor or other conductor, allowing current to flow to and burn unintended tissue far from the operative site.

Question 23: When using monopolar electrosurgery, the CRNFA should ensure the dispersive electrode (grounding pad) is placed:

Over a bony prominence for secure adherence
On any dry, hairless skin surface available
On the patient's back regardless of surgical site location
On a well-vascularized muscle mass close to the operative site (Correct answer)

Correct answer: On a well-vascularized muscle mass close to the operative site

The dispersive electrode must be placed on a well-vascularized site near the surgical field to ensure adequate current dispersion and reduce burn risk.

Question 24: When handling instruments that have been exposed to Creutzfeldt-Jakob disease (CJD) prions, standard sterilization with steam autoclave is:

Sufficient only if high-temperature 273°F (134°C) cycles are doubled
Insufficient; prions require specialized decontamination protocols (Correct answer)
Sufficient if a full prevacuum cycle is used
Sufficient when combined with glutaraldehyde soaking

Correct answer: Insufficient; prions require specialized decontamination protocols

Prions are not inactivated by standard steam sterilization or chemical disinfectants; WHO and CDC recommend instrument destruction or highly specialized alkaline/autoclaving protocols.

Question 25: During a laparoscopic procedure, the surgeon asks the CRNFA to adjust the monopolar ESU settings. Which finding on the ESU display indicates that the dispersive pad alarm is activated?

The generator automatically switches to bipolar mode
Power output exceeds 100 watts
The contact quality monitor indicator shows poor pad contact (Correct answer)
The display shows 'max output' warning

Correct answer: The contact quality monitor indicator shows poor pad contact

Modern ESUs with contact quality monitoring display a poor contact warning when the dispersive pad has inadequate skin contact, preventing unsafe current return.

Question 26: The CRNFA is assisting with a bowel resection and selects a GIA stapler. GIA stands for:

General incision apparatus
Gastrointestinal insertion apparatus
Gastric intestinal approximation
Gastrointestinal anastomosis (Correct answer)

Correct answer: Gastrointestinal anastomosis

GIA stands for gastrointestinal anastomosis; this linear stapler simultaneously places two double rows of staples and cuts between them.

Question 27: What is the primary risk of placing an ESU dispersive pad over a bony prominence or scar tissue?

Generator malfunction
Excessive current density at the active electrode
Increased impedance causing inadequate current return and burns under the pad (Correct answer)
Reduced electrical resistance leading to burns at the active electrode

Correct answer: Increased impedance causing inadequate current return and burns under the pad

Bony prominences and scar tissue have poor contact area, increasing impedance at the dispersive pad, which can cause current to concentrate and produce a burn under the pad.

Question 28: During closure, the CRNFA should verify that drains are placed in which location relative to the primary incision?

Through a separate stab incision away from the primary wound to prevent contamination of the healing incision (Correct answer)
Directly through the incision line to reduce total skin wounds
As close to the incision as possible for stability
Placement location does not affect wound outcomes

Correct answer: Through a separate stab incision away from the primary wound to prevent contamination of the healing incision

Drains should exit through a separate stab wound to prevent the drain tract from contaminating the primary incision and to avoid weakening the primary closure.

Question 29: When using a harmonic scalpel (ultrasonic energy device), what is the primary mechanism of tissue sealing?

Radiofrequency energy at 300 kHz
Thermal conduction from the active blade only
Electrical coagulation of proteins
Mechanical vibration denaturing protein to form a coagulum (Correct answer)

Correct answer: Mechanical vibration denaturing protein to form a coagulum

The harmonic scalpel uses high-frequency mechanical vibration (55,500 Hz) to denature protein and form a coagulative seal without electrical current passing through the patient.

Question 30: A surgical wound is classified as Class III (contaminated). Which statement best describes this wound?

A clean-contaminated case such as elective bowel resection
A wound with established infection and pus
Open accidental wounds or cases with major breaks in sterile technique or gross spillage from hollow viscus (Correct answer)
An elective clean case such as hernia repair

Correct answer: Open accidental wounds or cases with major breaks in sterile technique or gross spillage from hollow viscus

Class III (contaminated) wounds include open traumatic wounds, major sterile technique breaks, or gross gastrointestinal spillage, carrying a moderate-to-high SSI risk.

Question 31: The portal triad in the liver consists of which structures?

Hepatic vein, bile duct, lymphatic vessel
Portal vein, hepatic vein, bile duct
Portal vein, hepatic artery, bile duct (Correct answer)
Hepatic artery, hepatic vein, lymphatic vessel

Correct answer: Portal vein, hepatic artery, bile duct

The portal triad consists of a branch of the portal vein, hepatic artery, and bile duct running together within connective tissue.

Certified Registered Nurse First Assistant (CRNFA)

The CRNFA exam assesses experienced registered nurse first assistants on their competency in intraoperative surgical techniques, perioperative patient assessment, basic sciences, and professional practice. It is administered by the National Assistant at Surgery Certification (NASC).

180

Questions

225 min

Time Limit

70%

To Pass

Checking for saved progress...

Exam Rules

You can skip questions and return to them later
Flag questions for review before submitting
No feedback shown until you submit the entire exam
Unanswered questions count as wrong — answer everything
10 pretest questions are mixed in and don't affect your score
Timer auto-submits when time runs out
Your progress is auto-saved every 30 seconds

These practice questions were written with AI tools. They are not real exam questions. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

nascertification.com — Test delivery, eligibility, fees, passing score, retake fee, retake policy, score validity, renewal, score release, time limit · verified Oct 2026