Simon Mooijaart
@drsimonpm.bsky.social
Professor of #Medicine and #Geriatrics
🏡 Lives: Leiderdorp, NL
🏥 Works: Leiden University Medical Center, Leiden, NL
🤩 Likes: 🚴🏻 #cycling, 📸 #photography, 🎶 #music
Mostly English 🇺🇸 / Sometimes Dutch 🇳🇱
Views my own
🏡 Lives: Leiderdorp, NL
🏥 Works: Leiden University Medical Center, Leiden, NL
🤩 Likes: 🚴🏻 #cycling, 📸 #photography, 🎶 #music
Mostly English 🇺🇸 / Sometimes Dutch 🇳🇱
Views my own
OpenAI is exploring “consumer health tools”.
If an AI is giving health advice, that’s medicine at scale.
And if it’s medicine, three things are non-negotiable:
1️⃣ Doctors in the loop
2️⃣ Older people in the design – not as an afterthought
3️⃣ Data that actually contains older people
buff.ly/h4bkdCJ
If an AI is giving health advice, that’s medicine at scale.
And if it’s medicine, three things are non-negotiable:
1️⃣ Doctors in the loop
2️⃣ Older people in the design – not as an afterthought
3️⃣ Data that actually contains older people
buff.ly/h4bkdCJ
November 18, 2025 at 8:13 AM
OpenAI is exploring “consumer health tools”.
If an AI is giving health advice, that’s medicine at scale.
And if it’s medicine, three things are non-negotiable:
1️⃣ Doctors in the loop
2️⃣ Older people in the design – not as an afterthought
3️⃣ Data that actually contains older people
buff.ly/h4bkdCJ
If an AI is giving health advice, that’s medicine at scale.
And if it’s medicine, three things are non-negotiable:
1️⃣ Doctors in the loop
2️⃣ Older people in the design – not as an afterthought
3️⃣ Data that actually contains older people
buff.ly/h4bkdCJ
If you read (social) media about AI, you almost become afraid of what AI will do to healthcare.
Personally, I’m more afraid of what will become of care without AI.
Despite the hype, the mistakes, the hallucinations, the threats I believe AI can make care better.
❓ What do you think?
#AI #MedSky
Personally, I’m more afraid of what will become of care without AI.
Despite the hype, the mistakes, the hallucinations, the threats I believe AI can make care better.
❓ What do you think?
#AI #MedSky
October 25, 2025 at 7:12 PM
“𝗪𝗵𝗼 𝗮𝗺 𝗜 𝘁𝗼 𝘀𝘁𝗼𝗽 𝘁𝗮𝗸𝗶𝗻𝗴 𝗺𝘆 𝗺𝗲𝗱𝗶𝗰𝗮𝘁𝗶𝗼𝗻?” - 𝘢 𝘱𝘢𝘵𝘪𝘦𝘯𝘵 𝘢𝘴𝘬𝘦𝘥 𝘪𝘯 𝘰𝘶𝘳 𝘳𝘦𝘤𝘦𝘯𝘵 𝘴𝘵𝘶𝘥𝘺.
That question stayed with me.
When doctors want to stop medication, wefocus on the clinical reasoning: Risk of bleeding. Limited benefit. A burden.
✔️ All true — but not enough.
Read more on LinkedIn
buff.ly/QxOg1f5
That question stayed with me.
When doctors want to stop medication, wefocus on the clinical reasoning: Risk of bleeding. Limited benefit. A burden.
✔️ All true — but not enough.
Read more on LinkedIn
buff.ly/QxOg1f5
August 24, 2025 at 3:26 PM
“𝗪𝗵𝗼 𝗮𝗺 𝗜 𝘁𝗼 𝘀𝘁𝗼𝗽 𝘁𝗮𝗸𝗶𝗻𝗴 𝗺𝘆 𝗺𝗲𝗱𝗶𝗰𝗮𝘁𝗶𝗼𝗻?” - 𝘢 𝘱𝘢𝘵𝘪𝘦𝘯𝘵 𝘢𝘴𝘬𝘦𝘥 𝘪𝘯 𝘰𝘶𝘳 𝘳𝘦𝘤𝘦𝘯𝘵 𝘴𝘵𝘶𝘥𝘺.
That question stayed with me.
When doctors want to stop medication, wefocus on the clinical reasoning: Risk of bleeding. Limited benefit. A burden.
✔️ All true — but not enough.
Read more on LinkedIn
buff.ly/QxOg1f5
That question stayed with me.
When doctors want to stop medication, wefocus on the clinical reasoning: Risk of bleeding. Limited benefit. A burden.
✔️ All true — but not enough.
Read more on LinkedIn
buff.ly/QxOg1f5
❓ 𝐓𝐡𝐞 𝐦𝐨𝐬𝐭 𝐩𝐨𝐰𝐞𝐫𝐟𝐮𝐥 𝐭𝐨𝐨𝐥 𝐢𝐧 𝐦𝐲 𝐜𝐚𝐫𝐞 𝐟𝐨𝐫 𝐨𝐥𝐝𝐞𝐫 𝐩𝐞𝐨𝐩𝐥𝐞? 𝐋𝐢𝐬𝐭𝐞𝐧𝐢𝐧𝐠!
➡️ 𝐀𝐧𝐝 𝐭𝐡𝐚𝐭 𝐢𝐬 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐲 𝐈 𝐛𝐞𝐥𝐢𝐞𝐯𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐩𝐫𝐨𝐦𝐢𝐬𝐞 𝐨𝐟 𝐀𝐈 𝐢𝐧
#Geriatrics
Reed more on LinkedIn
www.linkedin.com/feed/update/...
#medmastodon #ai #chatbot
➡️ 𝐀𝐧𝐝 𝐭𝐡𝐚𝐭 𝐢𝐬 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐲 𝐈 𝐛𝐞𝐥𝐢𝐞𝐯𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐩𝐫𝐨𝐦𝐢𝐬𝐞 𝐨𝐟 𝐀𝐈 𝐢𝐧
#Geriatrics
Reed more on LinkedIn
www.linkedin.com/feed/update/...
#medmastodon #ai #chatbot
August 21, 2025 at 6:55 AM
❓ 𝐓𝐡𝐞 𝐦𝐨𝐬𝐭 𝐩𝐨𝐰𝐞𝐫𝐟𝐮𝐥 𝐭𝐨𝐨𝐥 𝐢𝐧 𝐦𝐲 𝐜𝐚𝐫𝐞 𝐟𝐨𝐫 𝐨𝐥𝐝𝐞𝐫 𝐩𝐞𝐨𝐩𝐥𝐞? 𝐋𝐢𝐬𝐭𝐞𝐧𝐢𝐧𝐠!
➡️ 𝐀𝐧𝐝 𝐭𝐡𝐚𝐭 𝐢𝐬 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐲 𝐈 𝐛𝐞𝐥𝐢𝐞𝐯𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐩𝐫𝐨𝐦𝐢𝐬𝐞 𝐨𝐟 𝐀𝐈 𝐢𝐧
#Geriatrics
Reed more on LinkedIn
www.linkedin.com/feed/update/...
#medmastodon #ai #chatbot
➡️ 𝐀𝐧𝐝 𝐭𝐡𝐚𝐭 𝐢𝐬 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐲 𝐈 𝐛𝐞𝐥𝐢𝐞𝐯𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐩𝐫𝐨𝐦𝐢𝐬𝐞 𝐨𝐟 𝐀𝐈 𝐢𝐧
#Geriatrics
Reed more on LinkedIn
www.linkedin.com/feed/update/...
#medmastodon #ai #chatbot
Help, my AI has a delirium 😵💫
Last week - as a test - I asked an AI "who is Simon Mooijaart?" It gave me a confident, detailed answer... about someone else entirely 🙃
As a geriatrician, this instantly reminded me of delirium - a condition I see daily at the bedside: #delirium
🧵 1/8
Last week - as a test - I asked an AI "who is Simon Mooijaart?" It gave me a confident, detailed answer... about someone else entirely 🙃
As a geriatrician, this instantly reminded me of delirium - a condition I see daily at the bedside: #delirium
🧵 1/8
August 15, 2025 at 7:06 PM
Help, my AI has a delirium 😵💫
Last week - as a test - I asked an AI "who is Simon Mooijaart?" It gave me a confident, detailed answer... about someone else entirely 🙃
As a geriatrician, this instantly reminded me of delirium - a condition I see daily at the bedside: #delirium
🧵 1/8
Last week - as a test - I asked an AI "who is Simon Mooijaart?" It gave me a confident, detailed answer... about someone else entirely 🙃
As a geriatrician, this instantly reminded me of delirium - a condition I see daily at the bedside: #delirium
🧵 1/8
🥳 Superproud of this bunch: the management team of the CoClarity #RCT. Submitted the trial protocol today.
#CoClarity: A Shared Decision Support Tool to reconsider the use of Anti-Thrombotic Therapy in patients with #cancer in the last phase of life:
✅ Lower risk of #thrombosis
🛑 Risk of bleeding
#CoClarity: A Shared Decision Support Tool to reconsider the use of Anti-Thrombotic Therapy in patients with #cancer in the last phase of life:
✅ Lower risk of #thrombosis
🛑 Risk of bleeding
April 25, 2025 at 7:07 PM
🥳 Superproud of this bunch: the management team of the CoClarity #RCT. Submitted the trial protocol today.
#CoClarity: A Shared Decision Support Tool to reconsider the use of Anti-Thrombotic Therapy in patients with #cancer in the last phase of life:
✅ Lower risk of #thrombosis
🛑 Risk of bleeding
#CoClarity: A Shared Decision Support Tool to reconsider the use of Anti-Thrombotic Therapy in patients with #cancer in the last phase of life:
✅ Lower risk of #thrombosis
🛑 Risk of bleeding
Very nice #thesis defense by Jonathan Bogaerts earlie this week. 🧑🏻🎓
Depresribing of antihypertensive medication in the very old, an inspiring topic for lively (and funny) discussion!
🥳 Congratulations, Jonathan!
#geriatrics #hypertension #medsky
Depresribing of antihypertensive medication in the very old, an inspiring topic for lively (and funny) discussion!
🥳 Congratulations, Jonathan!
#geriatrics #hypertension #medsky
April 19, 2025 at 9:08 AM
Very nice #thesis defense by Jonathan Bogaerts earlie this week. 🧑🏻🎓
Depresribing of antihypertensive medication in the very old, an inspiring topic for lively (and funny) discussion!
🥳 Congratulations, Jonathan!
#geriatrics #hypertension #medsky
Depresribing of antihypertensive medication in the very old, an inspiring topic for lively (and funny) discussion!
🥳 Congratulations, Jonathan!
#geriatrics #hypertension #medsky
Use of #AI decreases with increasing age.
✅ #AI offers a lot of promises also in care for older people
❌ #AI is not tailored to needs of older people
➡️ We have work to do
🔗 JAMA, buff.ly/2jxuUhz
#geriatrics #digital #medsky
✅ #AI offers a lot of promises also in care for older people
❌ #AI is not tailored to needs of older people
➡️ We have work to do
🔗 JAMA, buff.ly/2jxuUhz
#geriatrics #digital #medsky
March 24, 2025 at 8:56 AM
Use of #AI decreases with increasing age.
✅ #AI offers a lot of promises also in care for older people
❌ #AI is not tailored to needs of older people
➡️ We have work to do
🔗 JAMA, buff.ly/2jxuUhz
#geriatrics #digital #medsky
✅ #AI offers a lot of promises also in care for older people
❌ #AI is not tailored to needs of older people
➡️ We have work to do
🔗 JAMA, buff.ly/2jxuUhz
#geriatrics #digital #medsky
Very nice #thesis by Jonathan Bogaerts:
📓 High blood pressure and its treatment in the very old - balancing benefits and risks
🧑🎓 Defense April 16th at #Leiden University
😀 really looking forward
#geriatrics #hypertension #medsky
📓 High blood pressure and its treatment in the very old - balancing benefits and risks
🧑🎓 Defense April 16th at #Leiden University
😀 really looking forward
#geriatrics #hypertension #medsky
March 21, 2025 at 10:21 AM
Very nice #thesis by Jonathan Bogaerts:
📓 High blood pressure and its treatment in the very old - balancing benefits and risks
🧑🎓 Defense April 16th at #Leiden University
😀 really looking forward
#geriatrics #hypertension #medsky
📓 High blood pressure and its treatment in the very old - balancing benefits and risks
🧑🎓 Defense April 16th at #Leiden University
😀 really looking forward
#geriatrics #hypertension #medsky
Nice presentation by #PhD candidate Denise Abbel about the complex choice to use #antithrombotic therapy in patients with #cancer in the last phase of life:
✅ prevention of thrombic events
❌ risk of bleeding
❓what is more important?
#oncology #geriatrics
✅ prevention of thrombic events
❌ risk of bleeding
❓what is more important?
#oncology #geriatrics
February 20, 2025 at 1:21 PM
Nice presentation by #PhD candidate Denise Abbel about the complex choice to use #antithrombotic therapy in patients with #cancer in the last phase of life:
✅ prevention of thrombic events
❌ risk of bleeding
❓what is more important?
#oncology #geriatrics
✅ prevention of thrombic events
❌ risk of bleeding
❓what is more important?
#oncology #geriatrics
Nice hike 🥾 exploring the surroundings of the Symposium 😀
January 26, 2025 at 4:22 PM
Nice hike 🥾 exploring the surroundings of the Symposium 😀
Signing in at the European #Pancreas Islet Transplantation Association Symposium for a talk tomorrow on #transplantation in older people
📍Igls, Innsbruck, #Austria
#geriatrics
📍Igls, Innsbruck, #Austria
#geriatrics
January 26, 2025 at 4:20 PM
Signing in at the European #Pancreas Islet Transplantation Association Symposium for a talk tomorrow on #transplantation in older people
📍Igls, Innsbruck, #Austria
#geriatrics
📍Igls, Innsbruck, #Austria
#geriatrics
Attitudes of medical researchers towards #AI #chatbots:
✳️ interested
❓ more training needed
Nice study in The Lancet Digital Health!
🔗 https://buff.ly/4gwhLSK
#medsky
✳️ interested
❓ more training needed
Nice study in The Lancet Digital Health!
🔗 https://buff.ly/4gwhLSK
#medsky
December 27, 2024 at 4:04 PM
Attitudes of medical researchers towards #AI #chatbots:
✳️ interested
❓ more training needed
Nice study in The Lancet Digital Health!
🔗 https://buff.ly/4gwhLSK
#medsky
✳️ interested
❓ more training needed
Nice study in The Lancet Digital Health!
🔗 https://buff.ly/4gwhLSK
#medsky
Sunday afternoon ride on Traning Peaks Virtual 🚴♂️
#cycling #TPV
🔗 http://tpks.ws/IMLFGMTKUIJKNWYA2WCXJGA5WY
#cycling #TPV
🔗 http://tpks.ws/IMLFGMTKUIJKNWYA2WCXJGA5WY
December 22, 2024 at 1:18 PM
Sunday afternoon ride on Traning Peaks Virtual 🚴♂️
#cycling #TPV
🔗 http://tpks.ws/IMLFGMTKUIJKNWYA2WCXJGA5WY
#cycling #TPV
🔗 http://tpks.ws/IMLFGMTKUIJKNWYA2WCXJGA5WY
🌧️ 💨 ☁️ Typical depressingly grey, cloudy, windy and rainy weather on the shortest day of the year 🌧️ 💨 ☁️
BUT:
☀️ 😎 longer days, more light and more sun from today onwards ☀️ 😎
BUT:
☀️ 😎 longer days, more light and more sun from today onwards ☀️ 😎
December 21, 2024 at 2:28 PM
🌧️ 💨 ☁️ Typical depressingly grey, cloudy, windy and rainy weather on the shortest day of the year 🌧️ 💨 ☁️
BUT:
☀️ 😎 longer days, more light and more sun from today onwards ☀️ 😎
BUT:
☀️ 😎 longer days, more light and more sun from today onwards ☀️ 😎
🤩 Very excited and proud to have received the #PhD #thesis of Carlijn Voorend
📖 Appropriate care for older people approaching #kidney failure. Design and implementation of geriatric assessment in kidney care
👩🎓 Looking forward to the defense on January 27th !
#geriatrcs #nephrology #gerisky
📖 Appropriate care for older people approaching #kidney failure. Design and implementation of geriatric assessment in kidney care
👩🎓 Looking forward to the defense on January 27th !
#geriatrcs #nephrology #gerisky
December 20, 2024 at 10:08 AM
🤩 Very excited and proud to have received the #PhD #thesis of Carlijn Voorend
📖 Appropriate care for older people approaching #kidney failure. Design and implementation of geriatric assessment in kidney care
👩🎓 Looking forward to the defense on January 27th !
#geriatrcs #nephrology #gerisky
📖 Appropriate care for older people approaching #kidney failure. Design and implementation of geriatric assessment in kidney care
👩🎓 Looking forward to the defense on January 27th !
#geriatrcs #nephrology #gerisky
✳️ Exciting day for the LUMC #Research Theme on #Lifecourse #Epidemiology and #Geroscience on January 27th 2025.
🤩 Looking forward to a lot of inspiration by our talented #PhD and #Postdoc researchers!
#geriatrics
🤩 Looking forward to a lot of inspiration by our talented #PhD and #Postdoc researchers!
#geriatrics
December 19, 2024 at 8:19 AM
✳️ Exciting day for the LUMC #Research Theme on #Lifecourse #Epidemiology and #Geroscience on January 27th 2025.
🤩 Looking forward to a lot of inspiration by our talented #PhD and #Postdoc researchers!
#geriatrics
🤩 Looking forward to a lot of inspiration by our talented #PhD and #Postdoc researchers!
#geriatrics
Disagreement on foundational principles of biological #aging
This survey published in #PNASNexus reveals that aging researcher experts disagree on:
1️⃣ definition of aging?
2️⃣ when does it start?
3️⃣ is it a disease?
#ageing #geriatrics #gerisky
🔗 https://buff.ly/4eZ6Hfd
This survey published in #PNASNexus reveals that aging researcher experts disagree on:
1️⃣ definition of aging?
2️⃣ when does it start?
3️⃣ is it a disease?
#ageing #geriatrics #gerisky
🔗 https://buff.ly/4eZ6Hfd
December 4, 2024 at 10:50 AM
Disagreement on foundational principles of biological #aging
This survey published in #PNASNexus reveals that aging researcher experts disagree on:
1️⃣ definition of aging?
2️⃣ when does it start?
3️⃣ is it a disease?
#ageing #geriatrics #gerisky
🔗 https://buff.ly/4eZ6Hfd
This survey published in #PNASNexus reveals that aging researcher experts disagree on:
1️⃣ definition of aging?
2️⃣ when does it start?
3️⃣ is it a disease?
#ageing #geriatrics #gerisky
🔗 https://buff.ly/4eZ6Hfd
Prof Tash Masud at the #Leiden day for #medicine for older people
"Hippocrates was a #geriatrician"
😀 We are in good company!
#geriatrics
"Hippocrates was a #geriatrician"
😀 We are in good company!
#geriatrics
November 28, 2024 at 1:31 PM
Prof Tash Masud at the #Leiden day for #medicine for older people
"Hippocrates was a #geriatrician"
😀 We are in good company!
#geriatrics
"Hippocrates was a #geriatrician"
😀 We are in good company!
#geriatrics
😀Full house at the Leidse #Ouderengeneeskunde dag (#Leiden day of care for older people) at the #LUMC
👵👴 In co-creation with older people
👩⚕️👨⚕️ Multi-disciplanary professionals
📋 #Acute #geriatrics, complex care, #oncology
✅ >300 attending
👵👴 In co-creation with older people
👩⚕️👨⚕️ Multi-disciplanary professionals
📋 #Acute #geriatrics, complex care, #oncology
✅ >300 attending
November 28, 2024 at 9:47 AM
😀Full house at the Leidse #Ouderengeneeskunde dag (#Leiden day of care for older people) at the #LUMC
👵👴 In co-creation with older people
👩⚕️👨⚕️ Multi-disciplanary professionals
📋 #Acute #geriatrics, complex care, #oncology
✅ >300 attending
👵👴 In co-creation with older people
👩⚕️👨⚕️ Multi-disciplanary professionals
📋 #Acute #geriatrics, complex care, #oncology
✅ >300 attending
🎶 Thoroughly enjoyed #TheHowlAndTheHum in #Amsterdam tonight!
🎤 great voice, great performance!
#music
🎤 great voice, great performance!
#music
November 25, 2024 at 10:11 PM
🎶 Thoroughly enjoyed #TheHowlAndTheHum in #Amsterdam tonight!
🎤 great voice, great performance!
#music
🎤 great voice, great performance!
#music
November 24, 2024 at 4:02 PM
Renal replacement therapy RRT in older people: what is appropriate? Excellent lecture by Prof Joris Rotmans!
✅ More older people get #transplantation and live longer
❗️ #hemodialysis = clearance of 10 ml/min, so not really "replacement"
#geriatrics #nephrology
✅ More older people get #transplantation and live longer
❗️ #hemodialysis = clearance of 10 ml/min, so not really "replacement"
#geriatrics #nephrology
November 21, 2024 at 3:11 PM
Renal replacement therapy RRT in older people: what is appropriate? Excellent lecture by Prof Joris Rotmans!
✅ More older people get #transplantation and live longer
❗️ #hemodialysis = clearance of 10 ml/min, so not really "replacement"
#geriatrics #nephrology
✅ More older people get #transplantation and live longer
❗️ #hemodialysis = clearance of 10 ml/min, so not really "replacement"
#geriatrics #nephrology