Health technology should be easy to understand.

The evidence behind it should be too.

This page explains what YHE products do, what documentation supports those claims, and—equally important—what we do not claim.

Our goal is simple:

Make it possible to verify the product before you trust the marketing.

---

1. Measurement Technology

BP Doctor Fit

Fit uses an integrated inflatable wrist cuff and pressure-based oscillometric measurement.

The cuff physically inflates during a blood-pressure reading.

Its manual identifies:

• wrist measurement;
• approximately 14–22 cm wrist circumference;
• 0–260 mmHg pressure range;
• 40–180 bpm heart-rate range.

BP Doctor Ultra

Ultra uses the same general single inflatable wrist-cuff measurement approach and currently lists a recommended BP wrist fit of 14–22 cm.

BP Doctor Med

Med uses dual inflatable wrist cuffs and an oscillometric method.

Its manual lists:

• wrist measurement;
• 14–20 cm wrist range;
• pressure tolerance ±3 mmHg;
• pulse tolerance ±5%.

---

2. U.S. FDA Status

This section should be extremely specific.

BP Home CH-S693L

The YHE BP Home hardware model CH-S693L is explicitly included in FDA 510(k):

K251102

The FDA record names CH-S693L within the cleared Automatic Blood Pressure Monitor device family and records a July 16, 2025 substantial-equivalence decision.

Therefore, for this model:

FDA Cleared — 510(k) K251102

is an appropriate statement.

BP Doctor Fit

The current Fit manual provided by YHE states:

the product is not a medical device and health data should not be used as a basis for diagnosis or treatment.

We therefore should not present Fit as FDA-cleared unless a specific authorization record for the exact product becomes available.

BP Doctor Ultra / Med

The current materials reviewed for this page do not establish a U.S. FDA 510(k) authorization for these exact watch models.

Until such documentation is available, YHE should not present them as FDA-cleared U.S. medical devices.

This distinction matters because the FDA warns consumers that blood-pressure-measuring wearables require appropriate marketing authorization in the United States.

---

3. Testing

YHE currently shows product comparison demonstrations, including a Fit comparison against an upper-arm monitor.

That can help customers understand how the product behaves in a real use case.

But:

A product demonstration is not the same thing as an independent clinical validation study.

This page should keep those two things separate.

What we can show

• test setup;
• reference device;
• measurement order;
• actual readings;
• date;
• person measured;
• measurement position.

What we should not infer

• “most accurate watch in the world”;
• “clinically validated” without the relevant protocol;
• superiority over all upper-arm monitors;
• guaranteed identical readings.

---

4. Patents

YHE company materials describe investments in blood-pressure-related inventions, algorithms and device structures, and state that the company holds multiple invention and utility-model patents.

However, a high-quality evidence page should list specific patent numbers, not simply say “patented.”

So I strongly recommend adding a table:

Until the legal team provides those exact numbers, do not fabricate this section.

That will make the page much stronger later.

---

5. Known Measurement Limitations

Blood pressure is not a static number.

Wrist readings can change because of:

• measurement time;
• stress;
• exercise;
• talking;
• movement;
• wearing tightness;
• wrist height;
• wrist versus upper-arm location.

Fit's manual explicitly notes that wrist and upper-arm readings may differ and stresses heart-level wrist positioning.

BP Doctor is not continuous cuff BP measurement

Fit and Ultra require a cuff inflation cycle for each BP reading.

Measurement reminders are not continuous BP monitoring.

Wrist position matters

Wrist below heart level may read higher.

Wrist above heart level may read lower.

Fit matters

Loose or overly tight wearing can affect measurement.

Movement matters

Talking, wrist movement or clenching the fist can affect the reading.

---

6. What YHE Does Not Claim

I would literally put this on the site:

We do not claim that every BP Doctor reading will be identical to every upper-arm monitor reading.

We do not claim that every BP Doctor model is FDA cleared.

We do not claim that a smartwatch replaces professional medical care.

We do not recommend changing medication based only on smartwatch data.

This does not weaken the brand.

It makes the claims you can prove more believable.