Ihe ntụgharị nrụgide enwere ike ịtụfu bụ maka nleba anya na-aga n'ihu nke nrụgide physiological na mkpebi nke paramita hemodynamic ndị ọzọ dị mkpa.DPT nke Hisern nwere ike ịnye nha ọbara mgbali elu ziri ezi na ntụkwasị obi nke akwara na venous n'oge ọrụ enyemaka obi.