Product Manual
36 Blood Pressure Operation Welch Allyn Spot Vital Signs LXi
Infant Disposable One-Piece Cuff (SOFT-07-2MQ) are the smallest cuffs approved for use 
with young children and infants. The child’s arm must fit within the range markings on the 
cuff.
Blood Pressure Measurement
The preferred blood pressure measurement site for adults and children is the upper arm. 
Keep the patient’s arm relaxed and motion-free during measurement(s). Alternate blood 
pressure measurement sites include the thigh, ankle, or forearm.
To initiate blood pressure measurements:
1. Properly size the blood pressure cuff and position it around the patient’s bare upper 
arm (or alternate site as necessary) with the artery index marker over the brachial 
artery. Leave room between the cuff and the arm for two fingers.
2. Press the Blood Pressure Start/Stop button. Spot LXi inflates the cuff to 
the appropriate level, measuring the blood pressure as the cuff is inflating. 
The systolic display shows the pressure in the cuff as the blood pressure 
determination is in process.
Pressing the Blood Pressure Start/Stop button at any time during a blood pressure 
determination aborts the measurement and rapidly deflates the cuff.
When complete, Spot LXi displays the systolic, diastolic, and pulse rate 
measurements. If you have enabled MAP in the Internal Configuration Mode Spot LXi 
also displays this value.
If Spot LXi is unable to determine a blood pressure while the cuff is inflating due to 
patient movement, excessive noise, or an arrhythmia, the device will attempt to 
measure the blood pressure while deflating the cuff.
WARNING  Do not place the cuff on any extremity that is used for intravenous 
infusions, or any area where circulation is compromised.
WARNING  Using the same arm for cuff inflation and SpO
2
 measurement may 
cause inaccurate SpO
2
 results.
WARNING  Excessive cuff tightness may cause venous congestion and 
discoloration of the limb.
WARNING Wrapping the cuff too loosely (preventing proper inflation) may result 
in errors. 
WARNING The Spot LXi is not intended to measure blood pressure on neonatal 
patients. The AAMI SP10:2002 standard defines neonates as children 28 days or 
less of age if born at term (37 weeks gestation or more); otherwise up to 44 
gestational weeks.
Note
Spot LXi displays the pulse rate, as determined from the blood pressure 
measurement method only if the SpO
2
 option is absent or disabled. If the SpO
2
function is operational, all pulse rate determinations are a result of the SpO
2
measurement method.










