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In normal respiration the anatomy of the upper airway helps to warm and humidify inspired air, and to retain the warmth and moisture contained in expired air. During inspiration, even cold or dry air is typically heated to 37°C and when fully saturated, contains 44mg H2O/L. In normal respiration, the anatomy of the upper airway helps to warm and humidify inspired gas, and to retain the warmth and moisture contained in expired air. When you inhale, even cold or dry gas is heated to body temperature and by the time it reaches your lungs, it contains the correct amount of moisture. In mechanical ventilation or anaesthesia, the patient’s upper airway may be bypassed by the introduction of a tracheal tube. As a result the patient’s lungs may be confronted with cold, dry inspired gas.   Prolonged exposure to dry ventilatory gases can lead to:

Localised inflammation of the trachea
• A reduction in ciliary function
• Retention and thickening of secretions
• Lowering of patient temperature
• Reduction in cardiopulmonary function
• Increased risk of tracheostomy tube occlusion
• Extended duration and cost of care

 
 

HME and HMEF Media
Our range of Heat and Moisture Exchangers (HMEs) and Heat and Moisture Exchanging Filters (HMEFs) include foam or corrugated paper in combination with a filter pad. Regardless of which type of material, the aim is to provide a large surface area with low resistance to flow making them effective as a heat and moisture exchanger.

 
 

     
  Humidification Effectiveness
The Intersurgical range of HMEs and HMEFs has been tested independently at TiM Germany (3) in accordance with the test methodology described in ISO 9360-1:2000 (4).  Visit our filtration and humidification page for further details.
 
   


 
Our range of HMEs for ventilation and spontaneously breathing patients improve the humidification of inspired gases. Also known as passive humidification, this requires an HME to be positioned within the breathing system close to the patient’s airway.

The HME is designed to replicate the functions of the upper airway, conserving the patient’s own expired heat and moisture and returning it to the patient on their next inspiration.

We offer a wide and comprehensive range of HMEs with a variety of efficiencies, sizes and shapes to ensure maximum customer choice whilst meeting all clinical requirements. Take a look at our range below, or click on the image to visit the relevant product page.

 

 

  The common features of Intersurgical’s HMEs include:

Designed for use within anaesthesia, intensive care and
  home care environments.
• Whilst providing some physical protection they do not
  provide bacterial or viral protection for the patient.

• The humidity output for all HMEs is tested and validated in
  accordance with ISO 9360-1:2000
(4).

 
  Our HME range
The products included in this range are listed below and they are available to order with various accessories:

 
 
Hydro-Therm™ HME is a small volume, lightweight device clinically suitable over a wide range of patient sizes.  
  Hydro-Therm™ 3 HME is a larger volume HME with rounded housing for use in anaesthesia and intensive care.
              
 

A heat and moisture exchanger designed for use on tracheostomised patients, the Hydro-Trach T is an ideal product for prolonged use with spontaneously breathing patients.

The Hydro-Trach™ T is available in the following options:
Safety blow off mechanism
• Swivel oxygen stem
• Suction port 
 




 
 

 
  The Hydro-Trach T is a small volume, lightweight device which is clinically suitable over a wide range of patient sizes. The normal system of temperature and moisture maintenance is bypassed by the insertion of a tracheostomy tube. The possible loss of heat and moisture can lead to serious complications, notably damage to cilia and the mucous glands.

This in turn may result in atelectasis, the retention of sputum, production of mucous plugs and potential tube occasion.
   
   


 
The Intersurgical range of heat and moisture exchanging filters (HMEFs) combines the filtration efficiency of dedicated breathing filters with optimum moisture return provided by the addition of an HME element. Designed for use at the patient connection.

We offer a wide and comprehensive choice of HMEFs with a variety of efficiencies, sizes and shapes to ensure maximum customer choice whilst meeting all clinicial requirements.


 

 

  The common features of Intersurgical’s HMEFs include:

Range of filtration efficiency between 99.9% and 99.999%

Independently validated against clinically relevant bacterial
  and viral challenges

Optimum level of humidification of medical gases

Independently tested to ISO9360(4)
• For use in breathing systems within intensive care and
  anaesthesia
• Maximum recommended use of 24 hours.

 

 
  Our HMEF product range
 

The products included in this range are listed below and they are available to order with various accessories:

 
A high-efficiency HMEF offered with a variety of patient connections. Filta-Therm Plus (1941001) provides the optimum solution for intensive care with improved HME performance and high filtration efficiency.  
            
 
The Inter-Therm range of sterile HMEFs is designed for use in breathing systems in the operating theatre and intensive care unit. The Inter-Therm includes corrugated paper HME media, providing excellent humidification and low resistance properties. Inter-Therm Mini angled offers an easy to use option with an integral 90° elbow for paediatrics, reducing the need for an additional catheter mount or separate patient elbow.

      
   
 
Clear-Therm 3 and Clear-Therm Angled - HMEF for use in anaesthesia and intensive care with the option of an integral 90° elbow, reducing the need for an additional catheter mount or separate patient elbow.











Clear-Therm Mini - A low volume option for optimum care and protection of ventilated paediatric and neonatal patients.






 
   
Clear-Therm Midi - A low volume option for minimising bulk and dead space in anaesthesia.



                  









Clear-Therm Micro  - An ultra low volume option for optimum care and protection of ventilated paediatric and neonatal patients.


 

Reference 3: Technologie Institut Medizin GmbH (TiM)
Reference 4: Anaesthetic and respiratory equipment, Heat and moisture exchangers (HMEs) for humidifying respired gases in humans. Part 1: HMEs for use with minimum tidal volumes for 250ml.
© Intersurgical Ltd, 2021
1185 Corporate Drive, Unit 2, Burlington, ON, L7L 5V5
(905) 319-6500 or toll free 1-866-223-2340