ST-504 controls
Why should heat and vibration be recorded separately?
Keep warmth, vibration, and air pressure distinct when describing a session.
Name the sensation
Warmth, pressure, and vibration differ.
Hold setup steady
Compare controls under similar conditions.
Stop for abnormal response
Do not compensate with another control.
The ST-504 combines several controls, but a shared sleeve does not make them the same function. Air compression changes chamber pressure. Heat changes warmth. Vibration creates a different physical sensation. A useful note names the control that produced the observation.
Describe the equipment, not an inferred outcome
“The sleeve felt warm” describes the heat function. “The lower chamber inflated and released” describes air operation. “The sleeve vibrated for part of the session” describes vibration. None of those sentences proves a change in circulation or recovery.
The heating modes guide explains H1-H3. The working modes guide explains the air-program labels. Keep those paths separate when troubleshooting.
Hold the session conditions steady
If the goal is to compare a device setting, keep the sleeve position, clothing, battery state, room temperature, and session time similar. Record heat and vibration as separate fields. Do not change pressure, heat, and vibration together.
This approach makes a support question clearer. It also prevents a warm sensation from being treated as evidence that the chamber sequence is working correctly.
A useful note for a mixed-control session
When several controls are selected, write them as separate fields. Record the H level, pressure label, vibration setting, duration, and the first observable change. This makes it easier to tell whether warmth, pressure, or vibration changed first. It also gives support a clearer description if the equipment behaves differently later.
Source boundary for combined controls
The manual controls the device limits. General FDA medical device information does not establish that warmth, pressure, or vibration improves circulation for every person.
Evidence boundary for combined controls
The manual controls the device limits. General FDA medical device information does not establish that warmth, pressure, or vibration improves circulation for every person.
A practical record for a mixed-control session
Write the heat level, pressure label, vibration setting, duration, and first observable change as separate fields. This helps distinguish warmth from pressure and vibration when conditions change.
Stop for an abnormal response
Stop for burning, pain, unusual heat, new redness, marked numbness, visible damage, smoke, or unexpected controller behavior. Do not increase another control to compensate. If the concern involves skin, sensation, a wound, or a medical restriction, use the safety and contraindications guide.
The manual controls the exact button sequence and limits. Independent functions should remain independent in the reader’s notes.