The HoverHeat

The Safety Problem Nobody Talks About: Time

Short procedures rarely expose weaknesses of a warming system. Lengthy orthopedic procedures, frequently lasting 2-6 hours with fixed positioning, anesthesia-induced tissue hypoperfusion, and localized soft tissue pressure, reveal the strengths and weaknesses of a warming system.

This combination creates two major risks:

1. Thermal Burns
   
    Thermal Burns
   
   

2. Cold Spots (Uneven Warming)
   The key difference between technologies is how they fail under anesthesia, tissue pressure, and over time.

Conductive Warming Mats: The Hidden Burn Risk

Mechanism of Heat Transfer

Electrical conductive warming systems rely on heat transfer by direct contact between the heating element and the patient’s body surface. Heat transfer efficiency depends on:

• Body surface contact with the heating pad
• Tissue perfusion
• Pressure distribution

At first glance, this seems efficient. But in long procedures, it can create a dangerous physiological mismatch.

Why Burns Occur

• Heat is constant and localized
• Pressure points reduce blood flow
• Tissue cannot dissipate heat effectively
• Patient cannot reposition

Result: Heat accumulates faster than it can be removed and a thermal burn occurs

Even modern systems with sensors cannot fully compensate for:

• Microvascular compression
• Uneven tissue density
• Prolonged immobility

The Clinical Reality

Conductive systems tend to produce:

• Hot spots at pressure points – hips, shoulders, sternum, thorax, back
• Cold zones where contact is poor

Warming coverage is therefore inconsistent and paradoxically, you can get burns and hypothermia in the same patient.

Conductive warming systems carry an intrinsic burn risk due to concentrated, continuous, and prolonged heat at contact surfaces.

Forced-Air Warming: Safer by Design

Mechanism of Heat Transfer

Traditional Forced-Air Warming (FAW) systems use convective heat transfer with the transfer of warm air to the patient through a disposable perforated blanket

• Heat is distributed, not concentrated
• Airflow continuously redistributes warmth
• No single tissue point absorbs excessive heat

Modern veterinary forced-air blankets when used correctly are designed to:

• Deliver even heat distribution
• Prevent localized overheating
• Maintain safe temperature gradients

Where Traditional Forced-Air Warming Falls Short

Even though forced-air is safer, traditional systems still have limitations:

• Underbody surfaces (the largest heat-loss area) are not warmed
• Blankets can interfere with surgical access
• Positioning can limit coverage
• Upper body may be warm – lower or dependent areas remain cold

When burns do occur, they are almost always due to misuse, such as:

•  “Hosing” – (disconnecting the blower hose and directing hot air directly onto a body surface)
• Improper blanket placement
• Prolonged exposure to concentrated airflow
  

Burn risk with Traditional Forced Air Warming Systems is primarily operator-dependent.

Enter HoverHeat: Solving Both Problems at Once

HoverHeat Warming Pad

HoverHeat is not just another forced-air warming blanket. It fundamentally changes how heat is delivered. It is a full-surface convective warming platform

What Makes It Different

Unlike traditional systems:

• It provides true underbody AND optionally, overbody warming simultaneously
  
  
• Uses a cushion of warm air, not direct contact heat
• “Levitates” the patient slightly, reducing pressure points
• Increases warming efficiency by 50–75% of any warm air blower 
• It distributes heat dynamically across a large surface area
• Lower and dependent areas of the body can now be warmed – a “heat sandwich”
  
  
  Simulated Under and Over Body Warming with HoverHeat
  

This directly addresses the two biggest risks:

• Burns (by eliminating contact heat)
• Cold spots (by warming the entire surface area)

 

Why HoverHeat Is Safer in Long Orthopedic Cases

1. Eliminates Contact Burn Mechanism

Conductive mats rely on:
Skin + pressure + heat = risk

HoverHeat uses:
Air + distribution + cushioning = protection

There is:

• No fixed heating element
• No localized heat buildup
• No dependence on perfusion at a single point

 

2. Removes Pressure Point Amplification

Because HoverHeat creates a dynamic air cushion and supports the body surface with millions of polyethylene fingers:

• Pressure is reduced at contact areas
• Tissue perfusion is better preserved
• Heat is continuously redistributed
• Microcirculation is preserved
• Heat trapping in dependent tissues is prevented

This is critical in:

• Lateral recumbency
• Hip procedures
• Long spinal surgeries

 

3. Eliminates Cold Areas (The Biggest Traditional FAW Limitation)

Traditional forced-air:

• Warms top OR bottom—but rarely both

HoverHeat:

• Warms the entire patient simultaneously – an overbody HoverHeat unit can be connected in series to the underbody HoverHeat unit
• Targets the largest heat-loss surface: the underbody surface

 This dramatically improves thermal uniformity.

 

4. Directs Air Flow Away from the Surgical Field

A major concern in orthopedic surgery is maintaining sterility.

HoverHeat is specifically designed to:

• Direct airflow away from the surgical field
  
  

This preserves:

• Sterility
• Surgeon comfort
• Workflow efficiency

5. The HoverHeat is the only warming system that has the option of continuous temperature monitoring of the patient warming surface. 

The HoverHeat has a first-of-its-kind breakthrough in patient warming with the design of the TempPort. The TempPort is an air-sealed Temperature Probe Portal that accommodates a temperature probe for continuous temperature monitoring of the patient warming surface. Provided with the TempPort is a wireless Bluetooth temperature monitor for temperature tracking and convenient precision temperature monitoring.
Temperature Probe in the TempPort

TempPort

• Eliminates the guesswork around warming so you can focus on patient care.
• Takes the risk out of patient warming.
• Allows you to provide precise patient warming by comparing three temperatures:
  • The patient's temperature – esophageal or rectal.
  • The patient's warming surface temperature.
  • The temperature of the temperature selection switch on your warm air blower.
• Makes thermal burns and hypothermia a distant memory.
• The TempPort comes with a wireless Bluetooth Temperature Monitor for tracking and precise continuous temperature monitoring.

 

HoverHeat with Temperature Monitor

 

Wireless Bluetooth Temperature Monitor

Real-World Comparison: Safety in Long Procedures

Risk Category   Heat transfer	Conductive Mats   Direct Conduction	Traditional FAW   Convection (air)	HoverHeat   Full Surface Convection
Burn risk	Moderate–High (contact heat)	Very low (misuse-dependent)	Lowest (no contact heat)
Heat distribution	Uneven	Moderate	Highly uniform
Cold spots	Common	Possible	Minimized
Pressure point risk	High	Low	Lowest (air cushion)
Suitability for 3–6 hr. cases	Caution	Good	Best – Optimal
Burn mechanism	Pressure + localized heat	Misuse (“hosing”)	No inherent burn mechanism

 

The Strategic Takeaway for Veterinary Practices

If you’re evaluating warming systems for orthopedic procedures, the decision should not be based on:

• “Does it warm?” (both do)

Instead, the question is:

 How does it behave over 3–6 hours under anesthesia?

Because that’s when:

• Burns occur
• Cold spots develop
• Complications begin

 

Final Verdict

For long orthopedic procedures:

Conductive Warming Mats

• Higher inherent burn risk
• Uneven heating
• Pressure-dependent performance

Traditional Forced-Air

• Safer baseline
• Good temperature control
• Cold spot limitations – warms portions of the upper body but not lower or underbody

HoverHeat (Next-Generation Forced-Air)

• Eliminates the contact burn mechanism 
• Provides full-body, uniform warming – underbody and optionally over body
• Reduces pressure-related risk
• Improves efficiency and coverage

HoverHeat is not just safer—it solves the core limitations of both Conductive and Traditional Forced-Air technologies.
HoverHeat Super Set with TempPort

Clinical Bottom Line

While conductive and forced-air systems are both effective for temperature management, their safety profiles differ under prolonged operative conditions.

The Full-Surface Convective Warming System (HoverHeat) provides the most balanced approach and the best safety profile by:

• Eliminating the primary mechanism of thermal injury (localized conductive heat)
• Minimizing cold areas (lower and under body) through comprehensive surface coverage
• Maintaining consistent performance over extended surgical durations
• Providing the only mechanism for continuous temperature monitoring of the patient warming surface – TempPort.

For long orthopedic procedures, the HoverHeat represents a clinically advantageous evolution in perioperative warming strategy.

References

1. Sandoval MF, et al. Resistive polymer vs forced-air warming in total joint surgery. Patient Saf Surg.
2. Sugai H, et al. Forced-air vs conductive warming RCT.
3. John M, et al. Resistive heating vs FAW hypothermia outcomes. Br J Anaesth.
4. Ackermann W, et al. Forced-air vs resistive warming safety review. Front Surg.
5. APSF. Burns from misuse of forced-air warming devices.
6. Ackermann W, et al. Forced-Air Warming and Resistive Heating Devices. Front Surg. 2018.
7. Krenzischek DA, et al. Evaluation of Forced-Air Warming Systems. J Post Anesth Nurs. 1995.