California RVT common mistakes
California RVT · Understand the traps and how to avoid them.
When calculating a drug dose, the candidate multiplies the patient's body weight in pounds by the mg/kg dose without converting pounds to kilograms first, resulting in a dose that is 2.2 times too high.
Under time pressure, candidates grab the first numbers they see on the label or in the vignette and skip the unit conversion step. The RVT exam often presents weights in pounds (common in US practice) while drug labels use mg/kg, so the mismatch is easy to overlook.
What to do instead
Adopt a mandatory three-step routine for every dose calculation: (1) convert weight to kg by dividing pounds by 2.2, (2) write the dose equation with units cancelling (mg/kg × kg = mg), (3) sanity-check the result against a known reference range (e.g., a 10-kg dog receiving 0.5 mg/kg should get 5 mg, not 11 mg). Practice with 20 mixed-unit problems until the conversion becomes automatic.
The candidate draws up a drug from a multi-dose vial using the same needle and syringe used to draw up a different drug earlier, or reuses a needle to withdraw from a vial, cross-contaminating the vial and altering drug stability.
In a busy clinical setting, candidates may try to save time by reusing equipment, and the exam tests whether they recognize that even trace contamination can inactivate drugs (e.g., incompatible pH) or introduce pathogens. Candidates often focus only on the injection step and forget the withdrawal step.
What to do instead
Memorize the rule: use a new needle and syringe for every withdrawal from a vial, and never enter a multi-dose vial with a needle that has touched another drug or the patient. On the exam, when a question describes reusing a needle or syringe, immediately flag it as an infection-control and drug-stability error.
During a surgical scrub, the candidate scrubs the hands and forearms for the required time but then holds the hands lower than the elbows while rinsing, allowing contaminated water to run back onto the hands.
Candidates memorize the scrub time (e.g., 5 minutes) but forget the principle of gravity: hands must remain above the elbows at all times so that water and contaminants flow away from the hands. This is a common practical error that exam questions test by describing the hand position.
What to do instead
Remember the rule 'hands up, elbows down' throughout the scrub and rinse. Practice the full scrub sequence in a mock setting, narrating each step: wet hands, apply soap, scrub each finger and arm in a set order, rinse from fingertips to elbows, and keep hands elevated while walking to the surgical suite. On the exam, any description of hands below elbows is a red flag.
The candidate selects the correct surgical instrument by name but fails to identify its proper use or the tissue it is designed for, such as choosing a Metzenbaum scissors for cutting heavy fascia or a Mayo scissors for delicate tissue.
Instrument names are memorized in isolation without linking them to tissue type and function. The exam often presents an image or description of a procedure and asks which instrument should be used, and candidates rely on name recognition rather than functional understanding.
What to do instead
Study instruments in functional pairs: Metzenbaum (delicate, fine dissection) vs. Mayo (heavy, fascia and sutures); DeBakey (atraumatic vascular) vs. tissue forceps (toothed, skin). For each instrument, write one sentence describing the tissue it is designed for and one sentence describing the consequence of using it on the wrong tissue. Review a surgical pack and identify each instrument's purpose aloud.
When monitoring anesthesia, the candidate focuses only on the pulse oximeter reading and ignores other parameters such as respiratory rate, end-tidal CO2, and blood pressure, missing a developing respiratory depression.
Pulse oximetry is emphasized as a key monitor, and candidates may treat a normal SpO2 as reassurance that the patient is stable. However, supplemental oxygen can maintain SpO2 even when ventilation is inadequate, so relying on one parameter leads to false security.
What to do instead
Adopt a systematic monitoring routine: every 5 minutes, record and evaluate the 'vital five'-heart rate/rhythm, respiratory rate and effort, mucous membrane color, CRT, and blood pressure (plus SpO2 and ETCO2 when available). On the exam, when a question describes a single abnormal parameter, ask what other parameters would be affected and which additional monitor would detect the problem earlier.
The candidate calculates a local anesthetic dose for a dental nerve block using the concentration on the vial (e.g., 2% lidocaine) but forgets to convert the percentage to mg/mL, resulting in a dose that is ten times too low or too high.
Percentage concentrations are common in dentistry, and candidates may not recall that 1% = 10 mg/mL. Under exam pressure, they may plug the number '2' directly into a mg/kg calculation without unit conversion.
What to do instead
Memorize the conversion: 1% solution = 10 mg/mL; 2% = 20 mg/mL; 0.5% = 5 mg/mL. For every dental local anesthetic calculation, first convert the percentage to mg/mL, then multiply by the volume to get total mg, then compare to the maximum dose (e.g., lidocaine 4.4 mg/kg without epinephrine, 7 mg/kg with epinephrine). Practice with at least 10 conversion problems.
The candidate positions a patient for a dental procedure with the head lower than the body (Trendelenburg) without recognizing the increased risk of aspiration and respiratory compromise, especially in a brachycephalic or sedated patient.
Candidates may copy a familiar surgical position without considering the unique needs of dental patients, who often have blood and water in the oral cavity. The exam tests whether they can select an appropriate position (e.g., sternal or lateral with head slightly elevated) and use a pharyngeal pack or suction.
What to do instead
Review positioning guidelines for dental prophylaxis: place the patient in sternal or lateral recumbency with the head slightly elevated and the neck extended to promote drainage. Always use a pharyngeal pack and continuous suction. On the exam, when a question describes a dental procedure, check that the position allows gravity to drain fluids away from the airway and that suction is available.
The candidate administers a drug intravenously without first confirming patency of the catheter and without checking for drug compatibility with the fluid line, leading to extravasation or precipitation.
In an emergency or busy setting, candidates may rush to give a drug and skip the patency check (aspirating for blood return) and compatibility check. The exam often presents a scenario where a drug is given through a line already running a different fluid, and candidates must identify the error.
What to do instead
Establish a pre-administration checklist for IV drugs: (1) verify catheter patency by aspirating and flushing with saline, (2) check drug compatibility with the running fluid (use a compatibility chart), (3) administer at the correct rate, (4) monitor the site for swelling. On the exam, any question describing a drug given without a patency check or compatibility check is likely testing this failure mode.
The candidate calculates a drug dose based on body weight but forgets to adjust for the patient's species or condition (e.g., using a canine dose for a feline patient, or ignoring hepatic/renal impairment) and selects an inappropriate dose.
Candidates may memorize a single dose for a drug and apply it universally, overlooking species-specific sensitivities (e.g., cats and certain drugs like permethrin or morphine) and the need for dose reduction in patients with organ dysfunction. The exam frequently includes species or condition details that should trigger a dose adjustment.
What to do instead
When calculating any dose, explicitly note the species and any organ dysfunction in the question. Use a species-specific formulary (e.g., Plumb's) and check for contraindications. For cats, remember common toxicities (e.g., permethrin, acetaminophen, ibuprofen) and dose reductions for drugs cleared by the liver or kidneys. Practice by reviewing 10 drug monographs and listing species-specific warnings.
During anesthesia recovery, the candidate extubates the patient while the cuff is still inflated or before the patient can swallow, causing laryngeal trauma or aspiration.
Candidates may focus on the timing of extubation based on return of swallowing reflex but forget to deflate the cuff first. The exam tests the sequence: deflate cuff, then remove tube during a swallow. Rushing leads to trauma.
What to do instead
Memorize the extubation sequence: (1) ensure the patient is breathing spontaneously and has a swallow reflex, (2) deflate the cuff completely, (3) remove the tube smoothly during a swallow, (4) monitor for stridor or respiratory distress. On the exam, any description of extubation without cuff deflation is an error. Practice with a simulator, verbalizing each step.