Following up on the recent topic about pneumothorax, I was wondering what effect exactly the
SEChestOcclusiveDressing has. I had been testing this sequence (in Pulse 3.0, in Java) with the soldier patient (intended to model a gunshot wound to the chest):
SETensionPneumothorax, open, right side, severity 0.7
SEHemorrhage, external, skin, rate 15 mL/min
SEHemorrhage, external, muscle, rate 35 mL/min
SEHemorrhage, external, RightPulmonaryArteries, rate 1 mL/min
SEHemorrhage, external, RightPulmonaryCapillaries, rate 1 mL/min
SEHemorrhage, external, RightPulmonaryVeins, rate 1 mL/min
- By 2 minutes, the patient has deteriorated significantly (tachycardia, tachypnea, hypoxia). So then I mimic performing a needle decompression and applying bandages to stop the bleeding:
SENeedleDecompression, right side
SEHemorrhage, external, skin, rate 0 mL/min
SEHemorrhage, external, muscle, rate 0 mL/min
(I’m not addressing the Pulmonary bleeding here because I’m under the impression that requires surgery.)
- Patient vitals rapidly return to normal, except for tachycardia (presumably because the lost fluid has not been replaced). At this point, the patient appears to remain stable for a long time (I ran for 60 sim minutes, and while the patient developed a low-grade fever about 22 mins in, the hypoxia did not come back).
After reading the topic linked above, I’m confused why this worked, because I never did a
SEChestOcclusiveDressing action. Perhaps if I waited longer the patient would destabilize again? Or maybe I’m not modeling the dressing correctly, and setting the hemorrhage rates to 0 is screwing something up?
Additionally, I’m curious as to the relationship between
SEChestOcclusiveDressing and hemorrhage. If I understand correctly, a real occlusive dressing would contain the bleeding, but I don’t know how that would work in pulse (how would it know which hemorrhages to reduce?). So I’m assuming it does not do this?