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Table 1 Required equipment and maintenance rules

From: High quality standards for a large-scale prospective population-based observational cohort: Constances

Exam

Equipment recommendations

Daily verification

Monthly verification

Annual verification

Procedure

Weight

• Class III medical scale CE marked

• Required precision: ± 0.1 kg

• Amplitude: 2.0–150.0 kg minimum

• Spirit level verification

• Zero displayed before use

NA

• Performed by an external certified body.

• Volunteer in underwear, motionless.

• Measurement read by the nurse once stabilization obtained.

Height

• Measuring rod

• Graduation: 1 cm

• Amplitude: 60–200 cm

• 10 cm space between heels indicated by floor markings.

• 0 graduation at the ground level – 1 mm tolerance permitted

• Cross-checking with the tape measure

• Performed by an external certified body.

• Volunteer standing, arms at sides, inside heels 10 cm apart, head upright, looking straight, deep breath in. Measurement read by the nurse, with slider at eye-level.

Waist-hips-abdominal circumference

• Tape measure with 2 sides of different colors.

• Graduation: 1 cm

• Amplitude: 0–150 cm

• Signs of wear

• Cross-checking with the measuring rod

• Renew every year

• Volunteer in underwear, standing with feet shoulder-width apart, arms slightly apart, motionless.

• Palpation of anatomical landmarks for right positioning (Waist: mid-axillary line; Hips: widest level over the greater trochanters)

• Ensure horizontality of the tape measure with no twists.

• Tape measure snug but not digging into the skin.

• Measurement read by the nurse on the exhale.

Arterial pressure

• Tensiometers provided by The “Constances” research team: OMRON 705.

• Accuracy of measurement: ±3 mmHg

• Amplitude: 0–300 mmHg

• Search for anomalies of the entire pneumatic circuit

NA

• Centralized and organized by the Constances research team

• Point of reference on the blood pressure cuff according to the arm circumference.

• Volunteer in supine position.

• First reading after a 5-minute rest, second reading on the contralateral arm, third reading after a 1-minute pause on the arm with the highest systolic blood pressure.

• Orthostatic hypotension measured after standing for 1 min

ECG

• 12 standard ECG leads

• Screen display and software program that ensures the overall management

• Recording features: speed (25 mm per second), amplitude (10 mm by mV), leads and filters.

• Examination table with a minimum width of 65 cm to avoid muscular contractions or arms falling off table.

• Signs of wear.

• Calibration signal at the beginning of each trace.

NA

• Performed by an external certified body.

• Volunteer in supine position, calm, arms at sides.

• Thorough skin preparation (remove grease)

• Ensure a good electrode-to-patient contact.

• Palpation of anatomical landmarks for proper placement of the electrodes

Far visual acuity

• Monoyer scale

• Floor marking to indicate the required reading distance of 3 or 5 m

• Unit: 1/10

• Required precision: ± 1/10

• Amplitude: 0/10–10/10

• Signs of wear, dirt

• Signs of wear

NA

• Volunteer standing or seated

• For monocular visual acuity: cover placed on one eye with no pressure

Near visual acuity

• Parinaud scale

• Unit: Parinaud

• Amplitude: 1.5–20

• Specific device provided by Constances to standardize the scale-brow distance (33 cm).

• Signs of wear, dirt

• Signs of wear

NA

• Volunteer seated

• Specific device in contact with the volunteer’s brow

• For monocular visual acuity: cover placed on one eye with no pressure

Audition

• Required precision: ± 3 dB from 500 to 4,000Hz and ± 5 dB beyond

• Amplitude: −10 to 85 dB by 5 dB steps minimum

• Test hearing by air conduction using a pulsed tone at various frequencies (from −10 to 85 dB – change by 5 dB steps).

• Control test of each frequency at 60 dB both sides

NA

• Performed by an external certified body

• Response mode: hand raised / response button pressed, held as long as tone is heard

• Volunteer unable to see the operator

• Headphones placed by the operator

• Start by a demonstration

• Otoscopy (to detect excessive earwax)

Spirometry

• As per requested by ATS/ERS task force

• Unit: L

• Required precision: 0.035 L

• Amplitude: 0–8 L

• Performed in accordance with the ATS/ERS guidelines

NA

• Performed by an external certified body in accordance with the ATS/ERS guidelines

• Performed in accordance with the ATS/ERS guidelines