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[Equipment] Data Based Cleaning Schedule
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andersonsta Offline

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Posts: 4
Joined: Apr 2014

Machine: ResMed S9 36005A
Mask Type: Full face mask
Mask Make & Model: resmed mirage quattro
Humidifier: ResMed H5i
CPAP Pressure: 12-17
CPAP Software: SleepyHead

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Sex: Undisclosed
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Post: #1
Data Based Cleaning Schedule
I just got a shiny new ResMed S9 AutoSet after using a Respironics for over 4 years. The old Respironics manual recommended cleaning the humidifier tank with mild detergent once a week. The new S9 manual recommends cleaning the humidifier tank with mild detergent daily.

Cleaning the tank daily seems stupid to me. If you start with a clean system, the air coming in is filtered, and you use distilled water, I find it unlikely that microorganisms would grow to concentrations large enough to affect health in 2 or 3 days.

Is there any publicly available data that supports a specific cleaning schedule? I am thinking of something along the lines of: x% of users who clean their tanks every 6 months experience health problems related to microorganisms growing in the tank, while that number drops to y% for users who clean their tanks every week, and z% for users who clean their tanks daily.

I know that individual users report everything from almost never cleaning their tanks to cleaning them daily. What I would like is some hard evidence that would help me determine how long it takes for a clean tank to become dirty enough to be likely to affect my health.
07-12-2014 12:37 PM
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trish6hundred Offline

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Posts: 6,430
Joined: May 2012

Machine: Resmed S9 AutoSet for Her
Mask Type: Full face mask
Mask Make & Model: Fisher & Paykel Simplus
Humidifier: H5i Heated Humidifier
CPAP Pressure: 10 - 7-20 Cm H2O
CPAP Software: Not using software

Other Comments: I started CPAP in 2008. Totally blind since birth.

Sex: Female
Location: Missouri, USA

Post: #2
RE: Data Based Cleaning Schedule
Hi andersonsta,
WELCOME! to the forum.!
I only clean my water chamber once a week and have not had any problems, I think it's a bit much to clean it daily. I use distilled water as well.
Hang in there for more responses to your post and best of luck to you.

trish6hundred
07-12-2014 01:13 PM
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diamaunt Offline

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Posts: 436
Joined: May 2012

Machine: S9 VPAP Auto 36006
Mask Type: Full face mask
Mask Make & Model: mirage quattro/pilairo q
Humidifier: none
CPAP Pressure: 9-20ish
CPAP Software: SleepyHead

Other Comments:

Sex: Male
Location: texas

Post: #3
RE: Data Based Cleaning Schedule
it's always better from a legal standpoint to say "clean it constantly" than "meh, don't worry"

if the put realistic needs in there, someone's going to get sick, (probably from some unrelated thing), blame the cpap for it, and sue.

at which point resmed says "did you sanitize it every 2 hours like the instructions said?" "well, no" "case dismissed".
07-12-2014 01:25 PM
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retired_guy Offline

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Posts: 2,744
Joined: Jan 2014

Machine: ResMed S9 Autoset
Mask Type: Nasal pillows
Mask Make & Model: Resmed Airfit P10
Humidifier: ResMed
CPAP Pressure: 10.6/14, EPR 3
CPAP Software: ResScan SleepyHead

Other Comments: Is it bedtime yet?

Sex: Male
Location: Beautiful, albeit very wet Oregon Coast

Post: #4
RE: Data Based Cleaning Schedule
(07-12-2014 12:37 PM)andersonsta Wrote:  I know that individual users report everything from almost never cleaning their tanks to cleaning them daily. What I would like is some hard evidence that would help me determine how long it takes for a clean tank to become dirty enough to be likely to affect my health.

That would depend on many variables. What water is being used, what is the condition of the water system supplying the water if public and/or well water is being used, what are the atmospheric variants in which the machine is used, what are the health and cleanliness of the occupants of the residence, what is the current moon phase, what is the hand of one sound clapping........... and so forth.

That said, I try to clean mine quarterly.
07-12-2014 02:19 PM
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PaytonA Offline
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Posts: 3,005
Joined: Dec 2013

Machine: ResMed S9 VPAP Auto
Mask Type: Full face mask
Mask Make & Model: Resmed Mirage Quattro
Humidifier: H5i(distilled-top up)
CPAP Pressure: VAuto MinE14.0 MaxI 20.6 PS4.0
CPAP Software: ResScan SleepyHead

Other Comments:

Sex: Male
Location: Orange County,California

Post: #5
RE: Data Based Cleaning Schedule
I try to very regularly clean mine ............... sometimes. Have not had any respiratory infections since the start of CPAP which is about 4 years now.
07-12-2014 02:47 PM
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justMongo Offline

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Posts: 3,844
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #6
RE: Data Based Cleaning Schedule
Almost everyone has an S9 tank now that can be taken apart for cleaning.
Doing it daily may prematurely cause the nylon snaps (for want of a better word) to break.
Having said that, distilled water and a clean air filter do not guarantee the tank cannot be contaminated.
Look at the air flow data. It's swings positive and negative. The sensor is located upstream of the humidifier.
Does this not indicate that when we exhale, we expel air back up the hose, through the humidifier?

(Unless the zero flow reference is relative; and we only reduce the outflow of the machine...)

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
07-12-2014 02:54 PM
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diamaunt Offline

Members-b

Posts: 436
Joined: May 2012

Machine: S9 VPAP Auto 36006
Mask Type: Full face mask
Mask Make & Model: mirage quattro/pilairo q
Humidifier: none
CPAP Pressure: 9-20ish
CPAP Software: SleepyHead

Other Comments:

Sex: Male
Location: texas

Post: #7
RE: Data Based Cleaning Schedule
(07-12-2014 02:54 PM)justMongo Wrote:  Look at the air flow data. It's swings positive and negative. The sensor is located upstream of the humidifier.
Does this not indicate that when we exhale, we expel air back up the hose, through the humidifier?

(Unless the zero flow reference is relative; and we only reduce the outflow of the machine...)

you're not taking the mask vents into consideration in your theory.

yes, the "zero" flow is zero relative to respiration, not zero absolute.

you'd have to be exhaling incredibly fast, and hard, and with superhuman volume to get anything back down that hose and into the humidifier.
07-12-2014 03:09 PM
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justMongo Offline

Monitors

Posts: 3,844
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #8
RE: Data Based Cleaning Schedule
(07-12-2014 03:09 PM)diamaunt Wrote:  you'd have to be exhaling incredibly fast, and hard, and with superhuman volume to get anything back down that hose and into the humidifier.

I accept the challenge. It's hoses at 10 paces at dawn!

Actually I checked my negative flow and it records about 40 LPM.
Looking at a spread sheet where I did a curve fit to intentional mask leakage v pressure, at my pressure, the mask outflow exceeds 40. So, indeed I'd have a tough time pushing air back up the hose.

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
(This post was last modified: 07-12-2014 04:41 PM by justMongo.)
07-12-2014 04:33 PM
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bwexler Offline

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Posts: 563
Joined: Mar 2012

Machine: PRS 1 BiPAP autoSV Advanced, with Heated Tube humidifier
Mask Type: Nasal mask
Mask Make & Model: Sleepweaver Élan
Humidifier: Resperonics Heated Tube humidifier
CPAP Pressure: Max pressure 25.0 cm H20, Max
CPAP Software: SleepyHead EncorePro

Other Comments: CMS 50i with Software for SpO2

Sex: Male
Location: San Marcos, CA, USA

Post: #9
RE: Data Based Cleaning Schedule
Being the clean freak that I am, I start withe a clean new tank every year or two. I try not contaminate it with soaps or detergents. I generally use reverse osmosis water. I also don't like to waste that valuable water each morning, although there is seldom anything left to dump. I don't put tap water in the tank to contaminate it either. So no washing, rinsing or dish washing of my PRS1 tank.
07-12-2014 04:48 PM
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justMongo Offline

Monitors

Posts: 3,844
Joined: Sep 2013

Machine: ResMed VPAP Auto (S9)
Mask Type: Full face mask
Mask Make & Model: ResMed Mirage Quattro
Humidifier: ResMed H5i
CPAP Pressure: 18 IPAPmax - 11 EPAPmin, PS=5
CPAP Software: Other Software

Other Comments: μολὼν λαβέ

Sex: Male
Location: Калифорния

Post: #10
RE: Data Based Cleaning Schedule
(07-12-2014 04:48 PM)bwexler Wrote:  Being the clean freak that I am, I start withe a clean new tank every year or two. I try not contaminate it with soaps or detergents. I generally use reverse osmosis water. I also don't like to waste that valuable water each morning, although there is seldom anything left to dump. I don't put tap water in the tank to contaminate it either. So no washing, rinsing or dish washing of my PRS1 tank.

What is your tank made of? Highly pure water is highly reactive with metals.

Actually, highly pure water (18 Mega-Ohm) is actually an electrical insulator. I've been involved in high energy research where a large 2 meter coaxial charge pulse line used water as an insulator. It carried a 2 Mega-Volt, 2 Mega-Ampere pulse to an Xray diode.

INFORMATION ON APNEA BOARD FORUMS OR ON APNEABOARD.COM SHOULD NOT BE CONSIDERED AS MEDICAL ADVICE. ALWAYS SEEK THE ADVICE OF A PHYSICIAN BEFORE SEEKING TREATMENT FOR MEDICAL CONDITIONS, INCLUDING SLEEP APNEA. INFORMATION POSTED ON THE APNEA BOARD WEB SITE AND FORUMS ARE PERSONAL OPINION ONLY AND NOT NECESSARILY A STATEMENT OF FACT.
07-12-2014 05:30 PM
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