Humidifier

humidifier
introduction

1. HUMIDIFIER PATEL.YASH.GIRISHBHAI

2. WHAT IS HUMIDIFICATION It is water vapor and at time, heat added to inspired gas of achieving near normal inspiratory condition when gas enters the airway.

3. WHAT IS IT IMPORTANT Adequate level of humidity and heat are necessary to ensure function of mucocillary transport system. During mechanical ventilation, humidification is crucial to avoid- Hypothermia Atelectasis Inspissation of airway secretion Depressed ciliary function

4. WHAT IS IDEAL HUMIDIFICATION Inspired gas is delivered into trachea at 32-36 degree C with content of 30-43 g/m3 Set temp. remains constant Humidification and temperature remain unaffected by large of fresh gas flows Device-simple to use

5. TYPE OF HUMIDIFIERS ACTIVE Heated humidifier Active source of heart and water PASSIVE Heat and moisture exchange filter (HMEF) Passively retains and humidity leaving trachea during expiration and recycle during next inspiration

6. PASSIVE HUMIDIFIERS Device that collects the patients expired heart and moisture and returns during the following inspiration “artificial noses” Heat and moisture exchangers: device which uses the principle of heat and moisture exchange only Hygroscopic heat moisture exchanger: HHME

7. HHME- Most popular style of artificial nose Comprised of a paper or propylene to enhance moisture conservation

8. INDICATION Most useful during short term ventilation, in pt who are adequately hydrated Can be use as o2 therapy device in intubated pt.

9. CONTRAINDICATION Pt with thick, copious, or bloody secretion Pt with body temp < 32 degree C Pt with spontaneous MV > 10L/min It should be removed during aerosol treatment

10. HOT WATER HUMIDIFIER Water bath temp – thermostatically controlled Heated wire may be sited in inspiratory tubing – to maintain gas temp. and humidity

11. USE It is placed in inspiratory tubings Care should be taken – inspiratory and not expiratory tubing It should be lower than pt.- to void risk of water running down tube in to pt. Clear tubing should be used – so water can be seen

12. DISADVANTAGE Bulky and complex More costly than HMEs Electrical hazards Maintenance cost- control of temp, refilling of reservoir, cleaing and sterilization after sued

13. COLD WATER HUMIDIFIIER Simple, inexpensive Inefficient Potential source of microbiological contamination May cause bronchoconstriction

14. OTHER METHODS OF HUMIDIFICATION SYSTEMIC HYDRATION: regular fluid intake prevents secretions to become tenacious STEAM INHALATION: inhalation of the steam is helpful if they are encouraged to breath deeply.