Yeah, but no. The collection bag is usually beneath the donor, so that it collects faster. Unless there’s a machine to assist (like in collecting plasma, platelets, or double red donations)
Mechanical contraction of veins in your lower legs from muscle contractions (walking generally, but could just be clenching) is what “pumps” that blood back to the heart. Once blood enters the capillaries, the blood pressure is quite low and not sufficient to return to the heart.
This is why people can faint when standing for too long, commonly seen in military parades. It’s also why members are taught to clench the calves repeatedly/wiggle their toes to prevent this.
Mechanical contraction of veins in your lower legs from muscle contractions (walking generally, but could just be clenching) is what “pumps” that blood back to the heart. Once blood enters the capillaries, the blood pressure is quite low and not sufficient to return to the heart.
your legs are legitimately like a second heart. I was passing out because i just gave blood and had to sprint to the toilet and give some more. Well, on the toilet my vision started going grey. I’ve blacked out from low blood pressure 3 times in my life, I really didn’t want to do it on the toilet. I’m not pulling an Elvis. So i flexed all my leg muscles and (while sitting) kind of jogged my legs in place. It got the blood back up to my brain long enough for my capillaries and heart to catch up. if a dipshit like me can do it, so can you
There’s this stuff called blood pressure, that can make blood go up. That’s how the blood in your feet goes up towards your heart.
You mean I didn’t have to be crawling everywhere all this time?
I’ve been walking on my hands this whole time!
Yeah, but no. The collection bag is usually beneath the donor, so that it collects faster. Unless there’s a machine to assist (like in collecting plasma, platelets, or double red donations)
Mechanical contraction of veins in your lower legs from muscle contractions (walking generally, but could just be clenching) is what “pumps” that blood back to the heart. Once blood enters the capillaries, the blood pressure is quite low and not sufficient to return to the heart.
This is why people can faint when standing for too long, commonly seen in military parades. It’s also why members are taught to clench the calves repeatedly/wiggle their toes to prevent this.
your legs are legitimately like a second heart. I was passing out because i just gave blood and had to sprint to the toilet and give some more. Well, on the toilet my vision started going grey. I’ve blacked out from low blood pressure 3 times in my life, I really didn’t want to do it on the toilet. I’m not pulling an Elvis. So i flexed all my leg muscles and (while sitting) kind of jogged my legs in place. It got the blood back up to my brain long enough for my capillaries and heart to catch up. if a dipshit like me can do it, so can you
Yeah? Hold your hands above your heart for 5 minutes then tell me why this bag is a problem.
The blood that goes to your feet also must go down first. Gravity is still helping it along.