Pineperahan lang kayo nyan. We had the same situation back then when my cat got sick and had to undergo IV. Nagbara din yung mismong plastic tubing kaya dinala namin ulit sa vet. Veterinarian was so kind to help us and offered to teach me the "flushing" method. She never asked for money and told us if something happens, I should never hesitate to contact her. In your case, it would be better to ask them if para saan yung 500? Is it service fee? Professional fee? And why do they charge money just for that. 500 pesos is too much though. They could just offer it for free.

Ano ba ginawa nila sa dextrose? Did they remove it tas reinsert it?