NURS 450 Lecture Notes - Lecture 11: Body Surface Area, Cardiac Output, Diastole
29 Jan 2018
School
Department
Course
Professor
Document Summary
Wedge pressures senses what is in the left atrium. The balloon can only sense what is in front of it and not what is behind it. When we inflate the balloon it (cid:272)a(cid:374)"t se(cid:374)se thi(cid:374)gs (cid:271)ehi(cid:374)d it it looks for(cid:449)ard. E(cid:374)ses pul(cid:373)o(cid:374)ary syste(cid:373) a(cid:374)d all the (cid:449)ay to right atriu(cid:373) a(cid:374)d right (cid:448)e(cid:374)tri(cid:272)le (cid:271)e(cid:272)ause all (cid:862)doors are ope(cid:374)(cid:863) so measuring diastole. If (cid:448)al(cid:448)es are ste(cid:374)osis (cid:272)ould(cid:374)"t get a(cid:272)(cid:272)urate pressure. Take iced normal saline, inject and time it to see how long it takes to get through. Not everyone gets this measurement but have capability to get it when you have a swann catheter in. When getting on intermittent basis you see different curves. It is a series and you average it. 5-10ml of d5 or normal saline should inject in less than 4 seconds. More accurate picture is cardiac index which takes body surface area into account. Doppler transducer goes down into a ng tube minimally invasive.
