Zevex Feeding Pump Trouble Shooting

Check out the first post below about this pump system. As I mentioned there, we have been happy with the system, but there are times when it fails or causes frustration. I invite any others who are familiar with this pump to add their experience here as well. Or let us know if you have used or seen a better system.

The latch on the pump door will weaken over time and break from normal use. It is part of the molded plastic door and is flexible, but within 8 months, it will begin to crack and break off. This is a problem since the pump will not operate unless the door is latched closed. Usually, the equipment provider can switch out the pump for you, but this takes time and feedings cannot stop while you wait for a replacement. The first sign of the cracking is when the latch feels looser than normal. Then, if you look closely, you will notice a hairline crack across the top of the latch.

We have found a couple of ways to deal with this. Before the latch piece actually breaks off, I will cut a strip off of an index card length wise and then fold it in half over and over until it is the right thickness to wedge under the latch. (see the next photo) It just has to be thick enough to firm up the latch so that it can still flex enough to work, but not flex as far as it was. By making it tighter, it gives more time before it actually will break off.

Once it does break off, the pump door will no longer stay closed and therefore not function. To remedy this, we have used the velcro strap inside the backpack (the larger one only) to strap the pump in place tight enough to hold the door closed. 

The straps in the mini backpack will not do this. The only problem is that the elastic in this strap will wear out over time and not hold the door as well. So, there is a small size bungee cord that works perfectly. As far as I know, it is the smallest one they make. After the set from the bag is installed over the wheel and the pump door is closed, this cord will hold the door closed tight enough for it to function.

These are just a couple of things we have done to make this system work while waiting on a replacement pump or just the replacement door for the pump. I have emailed the company about its design, but they have yet to respond. There is another couple of flow problems I will talk about in the next post.

Zevex Feeding Pump

Macayla has a Zevex Enteralite Infinity feeding pump. It is a good system and she has used it for over two years now. We have enjoyed its portability and adjustability. It can be carried in a specially designed backpack and does not rely on gravity to work. It can be attached to a pole for bedtime as well with the pole clamp that is included. We wanted to include a few posts on this pump and point out a few troubleshooting ideas we have learned over the last two years using this pump.

 First, many nurses may not be familiar with they system as it differs from most hospital pumps. It is compact so many of the buttons on it do two functions. For example, the Run/Pause button is one button used to start the pump and stop the pump. The Vol/Total button is pressed once to show the current volume and if it is pressed again it will show the Total volume for the day. If you press the this button once and show the current volume and press the Clear button, it will only clear out the current volume and not the Total Volume. Since our daughter has struggled at various times to tolerate food, it has helped to be able to keep track of the Total volume throughout the day and only clear it before starting the next day's feeding. 

Basically the pump works like this:

Each bag (available in 500 ml or 1200 ml sizes) have a specially designed set that fits over the pump wheel. The door then shuts over it and must be closed in order for it to work. Then it is a matter of turning it on, setting the rate and dose and getting it started. There is a catheter tip (cone shaped) on the end of the tubing that fits into feeding tube connectors. So, it will mesh with most feeding tubes. The gray rectangle in the photo is the screen that indicates all the settings.

 

The pump has a Prime button on it, so you can fill the bag, install the set over the pump wheel, close the door and then press and hold the Prime button. It will push formula all the way through the tubing. But there is a faster way to do this. If you will notice in these photos there is a "longer" side to the set. On that longer side, you will see a teardrop shape on the blue tubing. It indicates the spot that must be pressed in order for the formula to flow through. There is a small stem inside the tubing and when it is pressed down or over, it allows formula to flow. 

I use my thumb and push the teardrop section of the blue tubing while holding the filled bag. With pressure on the bag and gentle pressure on the blue tubing, the formula will flow quickly to prime the rest of the tubing. If you hold the bag upside down and allow all of the air to reach the tubing first, then there will be no air left in the bag and it won't matter if the bag is upside down, sideways or any other direction. Gravity will not be needed to keep the formula flowing. 

Overall, a good system. However, it takes a little practice to prime the tube by hand. Sometimes those sets (the blue tubing portion) fail and cause the pump to not work. I'll deal with that in the next post.