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Tim Norfolk

@icmtim.bsky.social
727 followers 807 following 243 posts

UK single CCT ICM consultant. Strive to be humbled less often! #Haemodynamics #POCUS #FOAM

PostsRepliesMedia
Tim Norfolk @icmtim.bsky.social · 25/02/2026
This piece eloquently articulates my own thoughts on WLST. Current practice leads to avoidable harm, probably for many patients but definitely for their loved ones. We can and have a duty to do better, and should be brave enough to challenge current practice link.springer.com/article/10.1...
link.springer.com
Palliative General Anesthesia at Terminal Extubation: “Go Gentle into that Good Night” - Neurocritical Care
Withdrawal of life-sustaining treatments in the intensive care unit most often culminates into the discontinuation of mechanical ventilation and removal of the endotracheal tube or “terminal extubatio...
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Helen Kennedy @helenkennedy.com · 18/01/2026
This is such a cool illustration of how the Mercator map distorts the size of Greenland, which looks as big as the whole continent of Africa on that map but is actually the size of Mexico.
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Tim Norfolk @icmtim.bsky.social · 18/12/2025
These may well be the best years of your life, but I’m just saying 6.30-8.30am aren’t the best hours of those best years 🫠
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Tim Norfolk @icmtim.bsky.social · 17/12/2025
I’m not big on conspiracy theories but this one rings true… #CritcalClosingCriticalSchmosing
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NEJM.org @nejm.org · 25/11/2025
In patients with cardiovascular disease and an implantable cardioverter–defibrillator, increasing potassium levels to the high-normal range reduced the risk of arrhythmia events, hospitalizations, and death. Full POTCAST trial results and Research Summary: nej.md/4oQtHTN #MedSky
The New England Journal of Medicine                   
Potassium in Patients at High Risk for Ventricular Arrhythmias 
A Research Summary based on Jøns C et al. | 10.1056/NEJMoa2509542 | Published on August 29, 2025 

Visual representations of the patients in the trial and the treatments they were assigned.    

Read the full Research Summary at NEJM.org.
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josh farkas 💊 @pulmcrit.bsky.social · 29/10/2025
The doses of bicarb used were aggressive Interquartile range for total cumulative dose was 500-1000 ml of 4.2% bicarbonate That's equivalent to 5-10 amps (50 ml vials) of 8.4% in the USA You can use a LOT of bicarb if you have to (titrated to effect; also look at Na levels & avoid hyperNa) #4/4
media.tenor.com
a woman in a red dress is saying we go hard bravo
ALT: a woman in a red dress is saying we go hard bravo
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Tim Norfolk @icmtim.bsky.social · 12/10/2025
In honor of spooky month, share a 4 word horror story only someone in your profession would understand “Remember that patient you…”
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josh farkas 💊 @pulmcrit.bsky.social · 08/10/2025
normal mentation *doesn't* indicate adequate systemic perfusion especially in cardiogenic shock, people can mentate well despite terrible CO & systemic perfusion poor mentation is sometimes an early sign of *septic* shock, but often a very late indicator of other shock states #EMIMCC
media.tenor.com
Sad Sad Bean GIF
ALT: Sad Sad Bean GIF
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Anaesthesia @anaesjournal.bsky.social · 25/06/2025
Adjustment of positive end-expiratory pressure based on body mass index during general anaesthesia: a randomised controlled trial #AnSky doi.org/10.1111/anae...
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Tim Norfolk @icmtim.bsky.social · 25/06/2025
The fact the furosemide stress test does well at predicting who will need to commence/continue RRT is great (& unsurprising) but it doesn’t help us at the bedside. The real question is does earlier initiation/re-continuation of RRT help this cohort? 1/ ccforum.biomedcentral.com/articles/10....
ccforum.biomedcentral.com
Spontaneous diuresis in combination with furosemide stress test (SD-FST) as predictor for successful liberation from kidney replacement therapy: a prospective observational study - Critical Care
Background The optimal time for initiating kidney replacement therapy (KRT) in acute kidney injury (AKI) has been extensively studied in recent years. In contrast, there are currently insufficient dat...
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Mike Johansen @mikejohansenmd.medsky.social · 23/06/2025
😱
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Tim Norfolk @icmtim.bsky.social · 21/05/2025
A normal CT head ≠ a low risk of raised ICP/herniation after LP in meningitis❗️ “80% of pts with ABM who herniate have no CT abnormalities” 🔑 Take-away: Clinical signs (e.g. GCS <9, seizures, pupil changes) are the best indicators of WHO SHOULD NOT have a LP journals.sagepub.com/doi/epub/10....
journals.sagepub.com
Lumbar Puncture and Brain Herniation in Acute Bacterial Meningitis: An Updated Narrative Review
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Yuki Kotani, MD @yukikotani.bsky.social · 20/05/2025
🆕 New RCT in JAMA: Sedation in mechanically ventilated ICU patients—Dexmedetomidine vs Clonidine vs Propofol 📕 Main takeaway: In critically ill patients, neither dexmedetomidine nor clonidine shortened time to successful extubation compared to propofol.
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Tim Norfolk @icmtim.bsky.social · 08/05/2025
Procalcitonin- the more we learn, the less we love it 💔 ▪️94% of non-septic AKI pts had a Pct >0.5 prior to commencing CRRT ▪️Even using a threshold of >3.2 the specificity was only 38% 🗑️ “Pct in pts with AKI/ESRD should not be measured” #EMIMCC ccforum.biomedcentral.com/articles/10....
ccforum.biomedcentral.com
Procalcitonin levels in septic and nonseptic subjects with AKI and ESKD prior to and during continuous kidney replacement therapy (CKRT) - Critical Care
Background Procalcitonin is a 14.5 kDa protein used clinically as a marker of sepsis and therapeutic response to antibiotic therapy. However, its utility in critically ill patients with either acute k...
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Tim Norfolk @icmtim.bsky.social · 07/05/2025
Assessing fluid responsiveness in spontaneously breathing MV patients is tough, so this work on SIGH35 by Messina et al. is really 👌 ▪️ Apply a 35cm H20 ‘sigh breath’ for 4 secs and measure the change in pulse pressure from baseline to nadir Simples. 1/ ccforum.biomedcentral.com/articles/10....
ccforum.biomedcentral.com
SIGH35 and end-expiratory occlusion test for assessing fluid responsiveness in critically ill patients undergoing pressure support ventilation - Critical Care
Background Assessing fluid responsiveness is problematic for critically ill patients with spontaneous breathing activity, such as during Pressure Support Ventilation (PSV), since spontaneous breathing...
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Tim Norfolk @icmtim.bsky.social · 19/04/2025
Sometimes checking an ScvO2 feels pointless, but other times it’s 23% P.S. a CO2 gap of 2.3 (17mmHg) must take some beating?
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Tim Norfolk @icmtim.bsky.social · 17/04/2025
Does the over rapid correction of hypernatraemia really cause cerebral oedema in adults❓ Most guidelines suggest a rate of correction < 10mmol/L per day, and whilst there is evidence of risk in children (with tighter, more vulnerable brains) the evidence of risk in adults is scant 1/
media.tenor.com
two cartoon characters with big brains are standing next to each other in front of a brick wall
ALT: two cartoon characters with big brains are standing next to each other in front of a brick wall
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Tim Norfolk @icmtim.bsky.social · 14/04/2025
Basilar artery occlusion accounts for ≈10% of nontraumatic causes of coma Unconscious without a good explanation? CT head WITH ANGIOGRAPHY is a must❗️ www.sciencedirect.com/science/arti... #EMIMCC
sciencedirect.com
Systematic combined noncontrast CT–CT angiography in the management of unexplained nontraumatic coma
Nontraumatic impaired consciousness is a common issue in emergency departments with a serious but widely variable prognosis.The aim of this prospectiv…
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Tim Norfolk @icmtim.bsky.social · 09/04/2025
The finger sweep test is in every article there is on necrotising fasciitis yet in my experience, I’ve never known a surgeon perform it. Indeed they look askance if I’ve suggested it 🫤 Is this a 🇬🇧 thing? Curious to hear other people’s experience… #EMIMCC academic.oup.com/bjs/article/...
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Tim Norfolk @icmtim.bsky.social · 29/03/2025
📢 This bares emphasis 📢 If you’ve started vasopressin for septic shock & the BPs stable/improved but the skin is mottling, you’ve almost certainly made things worse. VA uncoupling with septic cardiomyopathy is a legit silent 🥷 Pressure ≠ perfusion
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Tim Norfolk @icmtim.bsky.social · 27/03/2025
Time to dump my shares in Sedaconda! Inhaled Sevoflurane led to increased 90d mortality compared to propofol (52.9% v 44.3%) in pts with ARDS (Also median duration of NMB use of 5 days in both groups seems wild 🫤) jamanetwork.com/journals/jam... #MedSky #EMIMCC
jamanetwork.com
Inhaled Sedation in Acute Respiratory Distress Syndrome
This clinical trial compares the efficacy of inhaled sevoflurane vs intravenous propofol for sedation in patients with acute respiratory distress syndrome.
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Tim Norfolk @icmtim.bsky.social · 19/03/2025
A great opportunity to recite this 💎: 1L of 0.9% Saline contains as much salt as 23 packets of Walkers Cheese & Onion crisps That initial 3L resus = 69 bags worth‼️ It’s no wonder people get a bit puffy as their poor kidneys battle to pee out all that 🧂😵‍💫🧂
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Sarah Phelps @phelpsiesarah.bsky.social · 13/03/2025
Adolescence on Netflix is fucking astonishing, urgent, vital and it hurts your heart. Incredible cast, direction and writing. You must watch it. You just must.
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Tim Norfolk @icmtim.bsky.social · 09/03/2025
Having discontinued Melatonin on numerous occasions (murmuring Pro-MEDIC to any poor soul who’ll listen) the rec FOR melatonin is quite triggering… Now to decide if I’ve got the humility to question my assertions & revisit the issue or just go full ‘Marik’ mode 💡 Ivermectin for delirium ⁉️
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josh farkas 💊 @pulmcrit.bsky.social · 07/03/2025
brief skytorial on the latest SCCM PADIS guideline update. this is a nice, useful, & concise statement that will change my practice. there are basically two take-home messages... (🧵 #1/3) journals.lww.com/ccmjournal/a... #EMIMCC
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Tim Norfolk @icmtim.bsky.social · 25/02/2025
📝 ▫️Clonidine should be carefully considered as there is a paucity of evidence around its use ▫️ Consider Haloperidol (first line) for psychomotor symptoms My colleagues will be gutted, but I’m all for the #VitaminH ❤️
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Tim Norfolk @icmtim.bsky.social · 23/02/2025
An excellent (albeit a little scary) retrospective study of arterial injury after CVC insertion. A National Audit Project looking at CVCs is a fantastic idea, & would hopefully help us answer additional questions (i.e. optimal insertion site, routine line changes, fixation device) #EMIMCC
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Tim Norfolk @icmtim.bsky.social · 22/02/2025
Thoughts and prayers to the poor centurion who got put on VA-ECMO 🥺 #Zentensivsim link.springer.com/article/10.1...
link.springer.com
Utilization and outcomes of life-supporting interventions in older ICU patients in Japan: a nationwide registry study - Intensive Care Medicine
Purpose The purpose of this study is to describe the implementation of life-supporting interventions and the short-term outcomes of older patients in ICUs in Japan. Methods All adult patients admitted...
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Tim Norfolk @icmtim.bsky.social · 20/02/2025
Some very challenging interactions with a new surgical colleague this morning #ILookLikeASurgeon 👩‍⚕️ 🥰 🦄
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Chris Carroll, MD @chriscarrollmd.com · 18/02/2025
New @accpchest.bsky.social transfusion guidelines out in #journalCHEST!
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Tim Norfolk @icmtim.bsky.social · 17/02/2025
Latest ACCP guidelines (post-MINT trial) for RBC transfusions in ICU have dropped 🔑 take-away recommendation: ❗️In patients with acute coronary syndrome, a permissive strategy is recommended (Hb >10 g/dL)❗️ #EMIMCC #MedSky journal.chestnet.org/article/S001...
journal.chestnet.org
Red Blood Cell Transfusion in Critically Ill Adults
Blood products frequently are administered to critically ill patients. Considering recent trials and practice variability, a comprehensive review of current evidence was deemed essential to offer pert...
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Tim Norfolk @icmtim.bsky.social · 11/02/2025
TL;DR ▫️There’s no good evidence mucolytics help (or harm) ventilated ICU pts ▫️Everyone uses them anyway ▫️🤞MARCH trial will give us some answers ▫️Until then, carry on practicing based on shameless personal bias/gestalt Fin/ #EMIMCC #MedSky ccforum.biomedcentral.com/articles/10....
ccforum.biomedcentral.com
Physiology and pathophysiology of mucus and mucolytic use in critically ill patients - Critical Care
Airway mucus is a highly specialised secretory fluid which functions as a physical and immunological barrier to pathogens whilst lubricating the airways and humifying atmospheric air. Dysfunction is c...
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Tim Norfolk @icmtim.bsky.social · 11/02/2025
Great to have an another tool in the pocket for assessing fluid responsiveness in patients ventilated with low Vt, although… Currently I just whack the Vt up to 9mls/kg, measure PPV then change them back. Seems a lot less faff 🫤 #EMIMCC ccforum.biomedcentral.com/articles/10....
ccforum.biomedcentral.com
Changes in pulse pressure variation induced by passive leg raising test to predict preload responsiveness in mechanically ventilated patients with low tidal volume in ICU: a systematic review and meta...
Background Pulse pressure variation (PPV) is limited in low tidal volume mechanical ventilation. We conducted this systematic review and meta-analysis to evaluate whether passive leg raising (PLR)-ind...
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Tim Norfolk @icmtim.bsky.social · 09/02/2025
Prognostication following cardiac arrest care is complex. Myoclonus is observed in about 20-30% of post-arrest patients admitted to ICU, and a frequent dilemma is distinguishing between simple myoclonus and myoclonic status 1/
media.tenor.com
a man wearing a pink hat and a jacket says do they tho really
ALT: a man wearing a pink hat and a jacket says do they tho really
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Tim Norfolk @icmtim.bsky.social · 06/02/2025
❓Authors suggest ensuring adequate respiratory drive (e.g. P0.1 >2) prior to US assessment, but presumably in severe diaphragmatic weakness P0.1 will be low. Don’t we really need EAdi measurements to look for neuro-mechanical uncoupling❓ #POCUS #emimcc link.springer.com/article/10.1...
link.springer.com
How I perform diaphragmatic ultrasound in the intensive care unit - Intensive Care Medicine
Intensive Care Medicine -
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Tim Norfolk @icmtim.bsky.social · 05/02/2025
Useful BNF reminder in 🇬🇧 context too. 500mg oral sodium bicarb ≈ 6mmol HCO3 1L of 1.26% sodium bicarb = 150mmol HCO3 Orders of magnitudes difference
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Katie Wiskar @katiewiskar.bsky.social · 03/02/2025
Doppler ultrasound for venous congestion - #VEXUS - has truly been game-changing in my clinical #POCUS practice. Here's the TL;DR on the concept of #VEXUS - 🧵 #emimcc
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Tim Norfolk @icmtim.bsky.social · 03/02/2025
As someone who is a fan of both decremental PEEP trials & monitoring P0.1 this paper is 🫶 Trying to personalise PEEP during PSV is tough, & we don’t all have EIT/oesophageal manometry! Pick the PEEP resulting in lowest P0.1, makes a lot of sense 😬 link.springer.com/article/10.1... #EMIMCC
link.springer.com
Personalized positive end-expiratory pressure in spontaneously breathing patients with acute respiratory distress syndrome by simultaneous electrical impedance tomography and transpulmonary pressure m...
Purpose Personalized positive end-expiratory pressure (PEEP) might foster lung and diaphragm protection in patients with acute respiratory distress syndrome (ARDS) who are undergoing pressure support ...
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Tim Norfolk @icmtim.bsky.social · 30/01/2025
Medics need to take a leaf out of the surgical playbook: “I’ve booked 78 year old Dorothy an HDU bed. She’s a little muddled and her urea is 8 with patchy consolidation right base. CURB-65 14% 30-d mortality. She’s a NEPA case so I’ll send her right up. No, on room air. BP 140/90”
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Tim Norfolk @icmtim.bsky.social · 29/01/2025
As I suspected… now don’t go complaining when I send your pre-planned HDU admission straight to the ward from recovery! 😜
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Tim Norfolk @icmtim.bsky.social · 28/01/2025
🇬🇧 Anaesthetist pals: Trying to educate myself on the role of CPET testing prior to major intra-abdominal surgery. Seems to be good evidence for its ability to predict mortality/morbidity/LOS, but any data to suggest routine HDU admission based on CPET scores actually improves patient outcomes?
A screaming patient on a exercise bike in the middle of an operating room surrounded by cheering surgeons
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Tim Norfolk @icmtim.bsky.social · 26/01/2025
Objection your honour! Ethanol is an ineffective osmole, so whilst it does raise measured serum osmolality it won’t cause the water shifts that lead to hypertonic hyponatraemia (unlike glucose/mannitol) jamanetwork.com/journals/jam...
jamanetwork.com
Hyponatremia, Hyposmolality, and Hypotonicity
The difficulty that nonnephrologists sometimes have with the differential diagnosis of hyponatremic patients often results from misinterpreting the significance of measured and calculated serum osmola...
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Tim Norfolk @icmtim.bsky.social · 24/01/2025
Question for MedSky community: Has anyone seen obstructive shock physiology resulting from dynamic hyperinflation in a ̲𝚜̲̲𝚙̲̲𝚘̲̲𝚗̲̲𝚝̲̲𝚊̲̲𝚗̲̲𝚎̲̲𝚘̲̲𝚞̲̲𝚜̲̲𝚕̲̲𝚢̲ ̲𝚋̲̲𝚛̲̲𝚎̲̲𝚊̲̲𝚝̲̲𝚑̲̲𝚒̲̲𝚗̲̲𝚐̲ patient with a severe COPD/asthma exacerbation? #EMIMCC
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Tim Norfolk @icmtim.bsky.social · 22/01/2025
If a picture’s worth 1000 words then this cine loop’s a damn novella dedicated to the pathogenesis of hepatic hydrothorax 😍 #EMIMCC #pocus
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Kevin J. Fowler @gratefull080504.bsky.social · 22/01/2025
The same research group reported that kidney transplant recipients were more fearful of going back on dialysis than dying. Think about that #nephjc
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Tim Norfolk @icmtim.bsky.social · 29/12/2024
In a retrospective cohort of 273 pts with HSV encephalitis: ➖ 4% had an initial -ve HSV PCR ➖ 17% had CSF WCC <5 ‼️ If you have a high clinical suspicion, continue aciclovir & repeat the LP (all false -ve occurred within 4 days of symptom onset) #EMIMCC pubmed.ncbi.nlm.nih.gov/35167501/
pubmed.ncbi.nlm.nih.gov
Herpes Simplex Virus Encephalitis With Initial Negative Polymerase Chain Reaction in the Cerebrospinal Fluid: Prevalence, Associated Factors, and Clinical Impact - PubMed
In severe herpes simplex encephalitis, initial negative CSF HSV PCR occurred in 4% of cases and was independently associated with worse neurologic outcome at hospital discharge. In these patients, a s...
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Tim Norfolk @icmtim.bsky.social · 10/12/2024
🤯 Prehospital Ketamine for BZD/ resistant Status Epilepticus 🔹Seizure termination in 56/57 (98.2%) * ESETT 📄 Levetiracetam terminated seizures in 68/145 (47%) by 20 mins 🔹 Only 2 pts required ventilatory support * ESETT 📄 Levetiracetam group 30/150 (20%) intubated at 60mins #EDIMCC
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Tim Norfolk @icmtim.bsky.social · 06/12/2024
Another day, another dissection, another excuse for the Drake Meme #EMIMCC
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Ed Palmer @doced.bsky.social · 03/12/2024
People often talk about the time critical nature of sepsis. But it may surprise you to hear that the evidence to support “early” antibiotics actually isn't a settled debate. Why is that? The key question is “early in relation to what”? 🧵 1/n
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