Introduction
While cold/hot therapy packs are essential for pain relief and recovery, improper use can cause serious harm. As an ISO 13485-certified manufacturer with 20+ years in medical thermotherapy, we’re revealing critical safety protocols backed by clinical research.
Myth 1: Applying Frozen Packs Directly to Skin
❌ Dangerous Practice
Packs straight from the freezer (-18°C/0°F) cause frostbite within 90 seconds** (CDC Warning). Skin contact at subzero temperatures triggers ice crystal formation in tissues.
**✅ Professional Protocol**
Always use a barrier:
- Wrap in damp towel (enhances conductivity)
- Use our medical-grade fabric sleeves (lab-tested for -20°C safety)
Test tip: Press pack to inner wrist for 5 sec – if painful, add more layers.
Myth 2: Icing Beyond 20 Minutes
**❌ Hidden Risk**
Prolonged exposure (>20 mins) causes reactive vasodilation – increasing swelling by 40% (Journal of Athletic Training). Nerve damage occurs at dermal temperatures ≤10°C (50°F).
**✅ Clinical Standard**
- 15-20 min sessions with 1-hour breaks
- Use Yishun SmartTemp packs with color-change indicators (blue=active/gray=safe)
Pro Tip: Set phone timer – never exceed 22 mins!
Myth 3: Using Ice Pack on Open Wounds
**❌ Infection Hazard**
Broken skin lacks epidermal protection. Cryotherapy:
- Slows healing by 60% (WHO Wound Care Guidelines)
- Risks bacterial ingress (Staphylococcus survival ↑300% at 4°C)
**✅ Emergency Protocol**
For lacerations:
- Apply pressure with CLEAN cloth
- Use perimeter cooling (2 inches from wound)
- Seek ER care for >1cm wounds
Myth 4: Microwave Overheating
**❌ Explosion Warning**
Superheating causes steam pressure exceeding 3 ATM – equivalent to soda can explosion. 23% of ER burns involve overheated packs (NEJM Case Reports).
**✅ Safe Heating Guide**
Pack Type Max Time Test Method Gel-based 15 sec Infrared thermometer ≥50°C=STOP Clay-based 30 sec Squeeze test (no firm spots) Note: Never heat packs with metal components
Myth 5: Machine Washing Therapy Packs
**❌ Structural Damage**
Agitation ruptures internal chambers – 78% of leaks originate from seam stress (ASTM F2097 test data). Detergents degrade polymer integrity.
**✅ FDA-Approved Cleaning**
- Wipe with 70% isopropyl alcohol wipes
- Air-dry vertically
- Store in breathable cotton bag
Pro Tip: Replace packs every 6 months – check our expiration tracker QR code
For more information about hot and cold therapy products ideal for injuries, pregnancy, children, or animals, check out YISHUN’s product section or contact one our sales.