1. Find spare pigtails: If the infusion set has spare pigtails, it can be replaced immediately.
2. Fix the blood bag by other methods: If there is no spare pig tail, consider fixing the blood bag by other methods, such as fixing the blood bag on the infusion stand or bed with adhesive tape or bandage.
3. Contact the manufacturer or supplier: If you can't find a spare pigtail or other suitable fixing methods, you can contact the manufacturer or supplier of the infusion set and ask if you can provide a replacement pigtail.
The pig's tail on the blood bag usually refers to a slender protrusion on the infusion set, which is used to facilitate the medical staff to fix the position of the blood bag during infusion and prevent the blood bag from slipping or shifting.