Patient Intake: Health History, Vital Signs, and Communication

Why Patient Intake Matters

Every patient encounter in a dental office begins with intake. The dental assistant gathers information that the dentist and hygienist rely on to plan safe, effective care. An incomplete or inaccurate intake can lead to serious patient harm — for example, failing to note a blood-thinning medication before an extraction, or missing a penicillin allergy before an antibiotic is prescribed. Patient safety begins with you, before the dentist ever enters the room.

The Health History

A health history form — modeled on formats published by the American Dental Association — captures medical conditions, current medications (including over-the-counter drugs and supplements), allergies, and previous dental and surgical experiences. Your role is to review, not diagnose. Walk the patient through the form, clarify any items they left blank or marked unclear, and flag anything that may affect treatment for the dentist's attention.

Key safety actions during health history review:

• Always ask about allergies to latex, medications, and dental materials. Document every allergy clearly.
• Ask whether the patient is pregnant or may be pregnant, since this affects radiograph decisions and some medications.
• Note any history of heart conditions, bleeding disorders, diabetes, or immunosuppression — these require the dentist's attention before treatment.
• Never alter a patient's stated answers. Document exactly what the patient reports.

If a patient reports a condition you are not sure about, record it accurately and alert the dentist. You are not expected to interpret medical diagnoses, only to document them.

Vital Signs: Overview

Vital signs give an objective snapshot of a patient's physiological status. Dental offices routinely measure four signs: blood pressure, pulse (heart rate), respiration rate, and body temperature. Pulse oximetry is increasingly common as well. Abnormal findings must be reported to the dentist before treatment proceeds — never proceed on your own judgment.

Normal adult reference ranges (for documentation and flagging purposes):

• Blood pressure: systolic 90–119 mmHg / diastolic 60–79 mmHg (normal); systolic ≥ 140 or diastolic ≥ 90 requires dentist review before elective treatment.
• Pulse: 60–100 beats per minute at rest.
• Respiration: 12–20 breaths per minute at rest.
• Temperature (oral): approximately 98.6 °F (37 °C); a range of roughly 97–99 °F is considered normal.
• Pulse oximetry (SpO₂): 95–100% is normal in a healthy adult.

Measuring Blood Pressure

Use a manual sphygmomanometer and stethoscope. Select the correct cuff size — a cuff that is too small reads falsely high; one that is too large reads falsely low. The cuff bladder should cover approximately 80% of the patient's upper arm circumference.

1. Seat the patient comfortably with feet flat on the floor and the arm supported at heart level.

2. Apply the cuff 1–2 cm above the antecubital fossa (inside of the elbow) with the artery marker aligned over the brachial artery.

3. Locate the brachial pulse, place the stethoscope bell or diaphragm lightly over it.

4. Inflate to approximately 30 mmHg above the point where the radial pulse disappears.

5. Release pressure slowly at about 2–3 mmHg per second.

6. The first Korotkoff sound (first clear tapping) is systolic pressure; the point where sounds disappear is diastolic pressure.

7. Record both values, the arm used, and the patient position.

Safety: Never measure on the side of a mastectomy, an arteriovenous fistula, or an injured arm.

Measuring Pulse and Respiration

For pulse, use the radial artery at the wrist. Press lightly with two fingers — never the thumb — and count beats for 60 seconds (or 30 seconds × 2 for a regular rhythm). Note the rate, rhythm (regular or irregular), and quality (strong or weak). An irregular rhythm must be flagged for the dentist.

For respiration, count chest rises for 60 seconds after measuring the pulse, while your fingers remain on the wrist so the patient does not consciously alter their breathing. Record rate and note any labored breathing or unusual sounds.

Measuring Temperature

With a digital oral thermometer, ensure the patient has not eaten, drunk hot or cold liquids, or smoked in the past 15 minutes, as these affect oral temperature. Place the probe under the tongue in the posterior sublingual pocket. Hold until the device signals. Discard the probe cover and disinfect per office protocol.

Pulse Oximetry

Clip the pulse oximeter to a fingertip free of nail polish and confirm a good waveform before reading. SpO₂ below 95% in a patient who appears stable is unusual and should be reported to the dentist promptly.

Documentation

Record every finding immediately — not from memory later. Use objective language: write the numbers you measured, not interpretations like "normal" without the value. If you must correct an entry, draw a single line through the error, initial it, and write the correct entry beside it. Never use correction fluid on a legal health record.

Plain-Language Communication

Patients arrive with varying health literacy, anxiety levels, and language backgrounds. Effective communication reduces fear and improves cooperation.

• Use plain language. Say "upper back tooth" instead of "maxillary second molar." Say "numb" instead of "anesthetized."
• Speak calmly and at a moderate pace. Make eye contact; crouch or sit at the patient's level rather than standing over them.
• Invite questions. Ask "What questions do you have?" rather than "Do you understand?" — the latter often produces a polite "yes" even when the patient is confused.
• Use teach-back for important instructions. Ask the patient to repeat key information in their own words.
• Respect cultural differences. Avoid assumptions about a patient's preferences or background.

Never dismiss a nervous patient's fears. Acknowledge them: "It is completely understandable to feel anxious. I will explain each step before I do it." This builds trust and supports a safe, cooperative appointment.