Are Pressure Bags Really Our Best Option for Rapid Fluid ... | 合法醫療器材資訊網

2019年3月12日—Asabagoffluidisinfusedandthevolumeofthebagdecreases,thepressurebagneedstobeconsistentlyre-inflatedtoensurepressure ...

Looking closer, the pressure gradient is only one factor in determining how quickly fluid can be delivered. In fact, fluctuating the other factors such as the length and diameter of the catheter can lead to a 10-fold difference in flow rates (158 – 1428 ml/min).1 In other words, the time to deliver a fluid bolus via pressure bag can be quite variable. In fact, in one study, the amount of time to infuse 500 mL of liquid using a 20g central venous catheter via a pressure bag inflated to 300mm Hg could be as long as 18 minutes.2

When all things are equal (type of fluid, length and radius of tubing), applying additional pressure will certainly increase the flow rates. However, the pressure gradient must be maintained to ensure consistent flow rates. As a bag of fluid is infused and the volume of the bag decreases, the pressure bag needs to be consistently re-inflated to ensure pressure maintains at 300 ...