drowning is mainly a respiratory problem first. the longer oxygen delivery is interrupted, the higher the risk of injury to the brain and other organs.
jordan’s underwater for around 3–4 minutes. he isn’t breathing properly, so oxygen isn’t getting into the lungs like it should.
🧠 plain-English takeaway: drowning is mainly a respiratory problem first. the longer oxygen delivery is interrupted, the higher the risk of injury to the brain and other organs.
1 • 🌊 submersion
☀
jordan: “bugoa, lingaw pa kaykog langoy2 ganina”
airway: “sir??? breathe sa ta please”
submersion → breathing impaired → ↓ o₂ delivery
water enters the respiratory system.
it’s not just ‘naa’y tubig sa lungs.’ the injury makes it harder for alveoli to stay open and for gases to cross into the blood.
water gets into the airways and alveoli. it can disrupt surfactant and injure the alveolar-capillary interface.
🧠 plain-English takeaway: it’s not just ‘naa’y tubig sa lungs.’ the injury makes it harder for alveoli to stay open and for gases to cross into the blood.
2 • 💧 aspiration
TRACHEA / AIRWAY
lungs: “kinsay nagpasulod ani”
water: “ikaw raman nag-inhale nako”
↓
aspiration → alveolar injury → gas exchange worsens
the tiny anti-collapse system is getting sabotaged.
if surfactant gets disrupted, surface tension rises. alveoli can collapse more easily, contributing to atelectasis.
type ii alveolar cells make surfactant. it lowers surface tension and helps keep alveoli open.
🧠 plain-English takeaway: if surfactant gets disrupted, surface tension rises. alveoli can collapse more easily, contributing to atelectasis.
3 • 🧴 surfactant disruption
before injury
open + easier to keep open
💧 💧
after injury
surface tension becomes a problem
surfactant: “ako ra baya nagkupot ani”
surface tension: “sige, ako na”
some alveoli said ‘di na ko apil.’
blood can still flow past poorly ventilated alveoli. that sets up v/q mismatch and shunt.
atelectasis means partial or complete collapse of alveoli or lung tissue. fewer open air spaces means less surface area for gas exchange.
🧠 plain-English takeaway: blood can still flow past poorly ventilated alveoli. that sets up v/q mismatch and shunt.
4 • 🫁 atelectasis
OPEN
air can reach the space.
COLLAPSED
much less usable ventilation.
open: “naa pay hangin diri”
collapsed: “ou, guro”
think: tiny air rooms losing their air.
the alveolar-capillary barrier starts leaking.
that fluid interferes with ventilation and surfactant. this contributes to pulmonary edema and worse oxygenation.
the alveolar-capillary barrier is normally very thin so o₂ can cross into the blood. injury increases permeability, so fluid and proteins leak into the interstitium and alveolar spaces.
🧠 plain-English takeaway: that fluid interferes with ventilation and surfactant. this contributes to pulmonary edema and worse oxygenation.
5 • 🩸 barrier injury
ALVEOLUS
air / O₂
BARRIER
• • •
CAPILLARY
blood
barrier: “selective ko, sorry”
injury: “mao ba”
the air spaces are now getting flooded. nice.
now o₂ has a harder time reaching the blood, and the extra fluid can further disrupt surfactant and ventilation.
with increased permeability, fluid builds up in and around the alveoli. this is non-cardiogenic pulmonary edema.
🧠 plain-English takeaway: now o₂ has a harder time reaching the blood, and the extra fluid can further disrupt surfactant and ventilation.
ventilation and perfusion have officially lost contact.
a true intrapulmonary shunt is blood flow through lung regions with little or no effective ventilation. this helps explain why severe hypoxemia can persist even with high fio₂.
some alveoli get very little air while blood keeps flowing through them. that blood leaves the lungs poorly oxygenated.
🧠 plain-English takeaway: a true intrapulmonary shunt is blood flow through lung regions with little or no effective ventilation. this helps explain why severe hypoxemia can persist even with high fio₂.
7 • 🔀 V/Q mismatch + shunt
AIR-POOR
BLOOD KEEPS FLOWING
BLOOD → → →
shunt: blood keeps flowing, but the alveoli aren't getting enough air.
now the numbers are getting suspicious.
the ABG shows severe hypoxemia, inadequate ventilation, and a mixed respiratory and metabolic acid-base disturbance.
🧠 plain-English takeaway: PaO₂ 50 and SpO₂ 84% mean there isn't enough oxygen in the blood. PaCO₂ 58 means ventilation isn't clearing CO₂ well enough. The low pH, low HCO₃⁻, and high CO₂ show both respiratory and metabolic acidosis.
8 • 🫁 severe hypoxemia
ABG
pH7.11
PaCO₂58mmHg
PaO₂50mmHg
HCO₃⁻16mEq/L
FiO₂ 100%
↓ PaO₂ 50 mmHg ↓ SpO₂ 84%severe hypoxemia
FiO₂: “binigay ko na sayo lahat2!!! pati 100% oxygen ko!”
lungs: “awwe aha ko man ni ibutang, yah?”
the whole-body oxygen crisis reaches the heart.
rosc restores circulation, but the cells still have to deal with what happened during the oxygen crisis. after cardiac arrest, the goal is to prevent secondary injury and protect the organs.
jordan was initially apneic and pulseless. cpr achieves rosc — return of spontaneous circulation. but circulation coming back doesn’t instantly erase the damage from the earlier hypoxia and ischemia.
🧠 plain-English takeaway: rosc restores circulation, but the cells still have to deal with what happened during the oxygen crisis. after cardiac arrest, the goal is to prevent secondary injury and protect the organs.
9 • ❤️ cardiac arrest → rosc
heart: “log out sako bai, 30 seconds nalay bilin”
cpr: “balik diri bai, ayaw sa”
PULSELESS
the brain is not having a good day.
the brain needs a lot of oxygen and has little tolerance for prolonged oxygen deprivation. cerebral edema can further affect brain function and intracranial physiology.
head ct shows diffuse cerebral edema with loss of gray-white matter differentiation, concerning for hypoxic-ischemic brain injury.
🧠 plain-English takeaway: the brain needs a lot of oxygen and has little tolerance for prolonged oxygen deprivation. cerebral edema can further affect brain function and intracranial physiology.
10 • 🧠 hypoxic-ischemic brain injury
🤲
i’m supposed to go down btw
ROSC
brain: “where my oxygen homies at?”
O₂: “gg freakin ez”
HYPOXIC ↓ O₂ISCHEMIC ↓ FLOW
ROSC = return of spontaneous circulation.
34.1°c changes the question.
for adults who remain unresponsive after rosc, aha guidance recommends deliberate temperature control within 32–37.5°c for at least 36 hours. if a patient is already hypothermic, avoid rapid rewarming; rewarming no faster than 0.5°c/hour may be reasonable.
jordan’s core temperature is 34.1°c after rosc. modern post-arrest care uses deliberate temperature control — we don’t automatically force everyone to exactly 33°c.
🧠 plain-English takeaway: for adults who remain unresponsive after rosc, aha guidance recommends deliberate temperature control within 32–37.5°c for at least 36 hours. if a patient is already hypothermic, avoid rapid rewarming; rewarming no faster than 0.5°c/hour may be reasonable.
11 • 🌡️ post-arrest temperature management
CT
thermometer: “34.1°c ko”
gojo: “it should be 33 bru”
thermometer: “source?”
gojo: “wala kay salig nako?”
cover judge by its test! ha? ou
the exam checks pupils, corneal reflexes, motor responses, and command following. eeg checks seizures and brain activity patterns. ssep can add prognostic information. ct and mri can show patterns of hypoxic-ischemic injury. no single test should be used alone.
over roughly the first 24–72+ hours, clinicians use serial neurologic exams, eeg, ssep, and neuroimaging while accounting for confounders like sedation, temperature, metabolic abnormalities, and other factors.
🧠 plain-English takeaway: the exam checks pupils, corneal reflexes, motor responses, and command following. eeg checks seizures and brain activity patterns. ssep can add prognostic information. ct and mri can show patterns of hypoxic-ischemic injury. no single test should be used alone.
12 • 🧠 neurological prognostication
OXYGENATION & VENTILATION
PERFUSION & BLOOD PRESSURE
🌡
TEMPERATURE MANAGEMENT
EEG / SEIZURE EVALUATION
NEUROLOGIC EXAM
CT
CT / MRI WHEN INDICATED
kuwang pa ni ug usa ka test para makaconclude, dai nge hangol
neuroprognostication is a timeline
do not turn one early finding into a final answer.
over the first 24–72 hours and beyond, clinicians may use serial clinical examinations, EEG, SSEP, CT/MRI trends, and other tests as appropriate. confounders and timing matter.
🧠 Plain-English takeaway: Think MULTIMODAL + TIME. one early exam, scan, or test should not be treated as the whole story.
13 • neuroprognostication: use multiple pieces + the right timing
0–24 hstabilize + serial exam
24–72 hEEG / SSEP / imaging trends as appropriate
latermultimodal interpretation with confounders considered
EEG
SSEP
SSEP
CT
CT/MRI
one test result ≠ final answer, talking stage pa gani.
so… what actually happened?
the whole case in one visual chain.
jordan’s drowning caused severe hypoxic injury with major lung dysfunction. the lungs became poor at oxygenating blood, hypoxemia became profound, cardiac arrest occurred, ROSC followed, and now post-arrest care focuses on limiting further injury and assessing recovery over time.
🧠 Plain-English takeaway: If your classmate can explain the chain in plain English, they understand the case — even before they memorize the vocabulary.
14 • the entire case, one chain
1SUBMERSION
2ASPIRATION
3SURFACTANT DISRUPTION
4ATELECTASIS
5BARRIER INJURY
6FLUID LEAKAGE
7PULMONARY EDEMA
8V/Q MISMATCH + SHUNT
9SEVERE HYPOXEMIA
10CARDIAC ARREST
11HYPOXIC-ISCHEMIC BRAIN INJURY
12ROSC
13POST-ARREST CARE
“aspiration injured the lungs → impaired oxygenation led to severe hypoxemia → cardiac arrest occurred → hypoxic-ischemic brain injury developed → post-arrest care focuses on protecting the brain and assessing neurological function.”