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Bio-Med Devices
Frequently Asked Questions

 


Crossvent+ FAQs

How long will my cylinder last while using the Crossvent?

Can I add entrainment to my Crossvent later if I buy it now without?

What is the expected life of the battery in the Crossvent?

Which pneumotach should I buy for my Crossvent?

Why does my blender leak gas out the bottom?

Can I replace the Power Supply that comes with the Crossvent with an "off the shelf" supply?

What does it mean to "refresh" the battery?

Do I need a Service Requistion Form  to send a unit in for service?

What are the power requirements for the Crossvent ventilators?

Can I use the Crossvent with an inverter?

Can I replace the battery in my Crossvent with any 6 D-cell pack?

How long does it take to fully charge the battery in the Crossvent?

How long will a fully charged battery last in the Crossvent?

Why are the oxygen sensor cells different between my Crossvent and Crossvent+?

Why are the batteries different between my Crossvent and Crossvent+?

Can the Crossvent+ be used in a hyperbaric chamber?

I seem to have difficulty unplugging the power cord.  Is there some trick to this?

What is the response time of the Crossvent+?

 

 

 

How long will my cylinder last while using the Crossvent+?

This depends on several factors, some being features being used and settings, but mostly it depends on cylinder pressure and tidal volume. The following formula may be used to calculate gas consumption for these ventilators. The result will give you the minutes remaining (or full duration if the cylinder pressure reflects a full cylinder).  For a comprehensive sheet (Acrobat Reader required) to print for your records, click here.

Cylinder Pressure x Factor(1)
Minute Volume + 2(2) LPM

(1) Commonly used factors for cylinders (air or O2)
D-CYL.   E-CYL.   G-CYL.   H-CYL.   M-CYL.
.16     .28     2.41      3.14    1.56

(2) Average gas consumption of the pneumatic
logic circuit in the CV-4.

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Can I add entrainment to my Crossvent later if I buy it now without?

Yes, they can be upgraded with the entrainment option at any time. We strongly recommend, however, that they be purchased with this option when new as it is much more cost effective.  Entrainment is not available on any Crossvent 2 series ventilator.



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What is the expected life of the battery in the Crossvent?

It is recommended that the battery be replaced every two years for optimum performance. The cycle (charge/discharge) life is 500 - 2000 cycles. It is recommended that you leave the charger plugged in when the ventilator is not in use whenever possible. Also, recharge the battery as soon as possible after using the ventilator in battery mode. To help ensure you get the optimum performance out of your Crossvent's battery, it should be periodically refreshed.  Click here for more information on the Crossvent's battery.




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Which pneumotach should I buy for my  Crossvent+?

We offer several pneumotachs, part numbers 4409 (infant without connector plug), 4409C (infant with connector plug), and 4410 (pediatric and adult). They are not interchangeable. The 4409 is used with the Crossvent 2i+ built-in version, the 4409C is used with the CV2i+  Stand-Alone version, the 4409C and 4410 are used with the Crossvent 2+.  The 4410 is used also with the Crossvent 3+ and Crossvent 4+.


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Why does the blender on my Crossvent+ leak gas out the bottom?

The blender only exhibits this bleed when the knob on the side of the blender is set to <15 LPM (<6 LPM on the Crossvent 2+).  This bleed is necessary to ensure concentration accuracy when using the blender for low flows, typically between 3 and 15 LPM (3 and 6 LPM). If your flow requirements are above 15 LPM (6 LPM), then set the knob to >15 LPM (>6 LPM) and no bleed will be necessary.  For a more in-depth explanation of blender bleeds, you can click here.

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Can I replace the Power Supply that comes with the Crossvent+ with an "off the shelf" supply?

No, this is not recommended. Any other power supply, other than the one provided by Bio-Med Devices may cause damage and/or unreliable operation. Refer to Power Requirements


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What does it mean to "refresh" the battery?

To refresh the battery means to recondition the rechargeable battery by fully discharging and then recharging it. To do this with the Crossvent+, unplug the external power supply, turn the unit on and put it in TEST mode. Press "VALVES" and turn on up to a maximum of three valves. Leave the unit this way until the display is blank. Turn the Crossvent off, wait at least one minute,  then plug the external power supply back in. Charge the battery for a minimum of five hours.


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Do I need a Service Requisition Form to send a unit in for service?

Yes. Download Service Requisition Form.


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What are the power requirements for the Crossvent+ ventilators?

When using a desktop plug-in power supply, only the power supply provided by Bio-Med Devices should be used. Any other power source must comply with the following standards:

  • Output: 16.0 VDC, 3 A
  • Output Protection: Short Circuit and Overload
  • Isolation: Meets IEC601.1, classification BF, UL 544 Patient Care, CSA 125 Risk Class 2G
  • Maximum Ripple: <100 mVp-p
  • Safety: Approved to UL 544/2601.1, CLU (CSA) 22.1 #125/601.1, TUV EN60601.1 & CE LVD
  • EMC: Designed to Level B Requirements of FCC part 15, CISPR11 (EN55011). Less than 1 Volt Output Deviation for IEC801-2, 3, 4, 5, Immunity Tests.

For more important information concerning this issue, please click here.


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Can I use the Crossvent+ with an inverter? 

If an inverter is necessary, it must conform to NEMA standards.  Inverters with "split winding" output transformers should not be used.  For more important information concerning this issue, please click here.


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Can I replace the battery in my Crossvent with any 6 D-cell pack? 

No. The battery should be provided by Bio-Med Devices to ensure it conforms to the specifications of the ventilator, both electrically and physically. Order part #PRT4467 for Crossvents 2+, 3+, & 4+.  Order PRT2268 (C-cell pack) for the Crossvent 2i+.


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How long does it take to fully charge the battery in the Crossvent? 

A fully depleted battery at room temperature should take approximately 5 hours to fully charge. Only use the power supply provided with the Crossvent to operate the unit and to charge the battery.


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How long will a fully charged battery last in the Crossvent? 

A fully charged battery under normal conditions should last approximately 6 hours with the backlight on. To extend this, the backlight may turned off.  Doing so, however, makes it impossible to see anything on the display.  Under this condition, the backlight is automatically restored if an alarm condition occurs or if the touchscreen is touched.


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Why are the oxygen sensor cells different between my Crossvent and Crossvent+? 

The sensor for the Crossvent+ uses a shielded cable and connector. This reduces electronic noise susceptibility and increases accuracy.


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Why are the batteries different between my Crossvent and Crossvent+? 

The Crossvent+ uses NiMH batteries which are more environmentally acceptable than the older NiCad batteries used in older products.


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Can the Crossvent+ be used in a hyperbaric chamber? 

Bio-Med Devices does not guarantee total performance under atmospheric pressure much greater than sea level. This might change if there is enough interest.


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I seem to have difficulty unplugging the AC adapter cord from the side of the Crossvent. Is there some trick to this? 

No, there is no trick to this although it is a locking connector.  You must grab it by the knurled barrel and pull it straight out. Do not twist it.  It is keyed to prevent it from rotating.


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What is the response time of the Crossvent+? 

The response time is 50 ms.


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