# NCCU
  * <todo>normal EVD output</todo>
  * <todo>MELAS</todo>
  * <todo>scores for predicting ICH outcomes</todo>
    * ICH score: predicts mortality at 1 month
      * comprised of GCS, age> 80, ICH vol >30 mL, IVH, infratentorial hemorrhage origin
    * FUNC score: 90 day function
      * comprised of ICH volume, age, ICH location, GCS, pre-ICH cognitive impairment
  * <todo>calculating IVH size</todo>
  * <todo>Spetzler-Martin grading system for AVMs</todo>
  * <todo>digital subtraction angiography</todo>
  * <todo>Parinaud syndrome</todo>
  * bicaudate index
  * SAH grading
    * Hunt Hess
    * modified fisher
  * normal pressure perfusion breakthrough
    * AVM resection and BP goals
    * Hydrocephalus ex vacuo vs obstructive hydro

nimodipine used for vasospasm ppx for aneurysm-related SAH. Not clear re: AVM.
===== ICU Improvements =====
  * vent reporting
  * limit to ACTIVE, RELEVANT ICU issues
  * for A/P, ACTIVE ICU problem and status of what's keeping them here
  * MINIMIZE computer use
    * especially as you get to know patients
    * use primarily for DATA reporting (vitals, labs)
  * chronic issues (only ACTIVE, relevant ICU issues)
    * e.g., ACI, hypothyroid
    * "no acute issues"
  * "vital signs stable"
  * GFAP

===== To Read =====
  * https://doi.org/10.34197/ats-scholar.2020-0019PS
  * PVAT (pulmonary velocity acceleration time)

RC711 .W469 2017, RC776.P87 P854 2004, RC756 .W45 2019

  * [[https://xlung.net/en/mv-manual/basic-modes-of-mechanical-ventilation | Vent Waveforms]]
==== Alveolar Gas Equation====
$P_AO_2 = F_iO_2(P_{atm}-P_{H_2O}) - \frac{P_aCO_2}{RQ}$

substituting back in to $RQ$ equation:
$RQ = \frac{P_ACO_2}{\frac{V_AP_ACO_2}{kVO_2}}= \frac{VO_2}{V_a}k$

$V_T = V_A + V_D$, where $V_A = 350$ and $V_D = 150$


==== Dead Space Fraction ====
$\frac{V_D}{V_T} = \frac{P_ACO_2 - P_ECO_2}{P_ACO_2}$

Formal measurement of $P_ECO_2$ requires volumetric capnography, which requires a capable ventilator or a dedicated measurement device.

Thankfull, $P_ECO_2 \approx ETCO_2$, so an approimation would $\frac{V_D}{V_T} = \frac{P_ACO_2 - ETCO_2}{P_ACO_2}$



==== Alveolar ventilation ====
$P_{A}O_2 = F_iO_2(P_{atm}-P_{H_2O}) - \frac{P_AO2}{RQ}$
$\dot{V}_A=k\frac{\dot{V}CO_2}{P_ACO_2}$
$\implies \dot{V}CO2 = \frac{\dot{V}_AP_ACO_2}{k}$

To convert $F_ACO_2$ into $P_ACO_2$, we have $F_ACO_2(P_{atm} - PH_2O = P_ACO_2$
Similarly, using $F_ECO_2$, we can show $P_ECO_2 = F_ECO_2(P_{atm} - P_{H_2O})$

$Volume_{expiredCO2} = Volume_{producedAlvCO2}$

$V_TF_ECO_2 = V_AF_ACO_2$

$V_TF_ECO_2 = (V_T - V_D)F_ACO_2$, and we can convert $F_ACO_2$ into $P_ACO_2$