Is there any difference between the human foley catheters and those used in the equine? I have read somewhere that a 30fr foley (human)might be appropriate for equine use. And the difference in price makes it more appealing to buy the 'human' version? Thoughts?
Diameter and length are significant in difference of course, as is the amount of air (or saline) that is needed to inflate the balloon. A 30Fr. will probably be OK for a maiden mare, but we use a 34Fr for routine flushes/lavages etc. You will typically need one that is >30 inches in length to do work on mares. The balloon in the equine Foley takes about 100-120 ml to inflate it. The human Foley typically even in the larger sizes requires only about 30 ml to inflate. This is likely to be your biggest problem, assuming that you can find a human Foley long enough to use in the equine.
You will also find a significant difference in price relative to what the Foley is made of. Latex is cheaper, but will not last as long, whereas silicone is more durable.
If you can find a human 30 to 34Fr 30" Foley that takes ³100 ml to fill the balloon, you will probably be OK. Less than that, and you are unlikely to get a sufficiently good seal around the cervix, or be able to fill or drain fluid with ease.
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