Satyendra Dhar, MD @DharSaty
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Hospital Medicine Clinical Assistant Professor The content and images on this website are provided for educational and informational purposes only and are not a substitute for professional medical advice, diagnosis, or treatment. The views expressed are those of the authors and do not necessarily reflect those of any affiliated institutions. While efforts are made to ensure accuracy and currency, medical knowledge is continually evolving, and errors or omissions may occur. Users are advised to independently verify information and seek guidance from qualified healthcare professionals for any medical decisions. By using this website, you acknowledge responsibility for your own clinical judgments, and the website and its contributors disclaim any liability arising from the use of its content. 👉 Follow 'Medical Infographics' on 👉 https://www.DharSaty.com
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Oral anticoagulants and reversal/hemostatic strategies. 

In the elegant tug-of-war between thrombosis and hemostasis, prescribing an anticoagulant
Oral anticoagulants and reversal/hemostatic strategies. In the elegant tug-of-war between thrombosis and hemostasis, prescribing an anticoagulant is essentially telling the clotting cascade, “Let’s all just relax,” until the moment it relaxes a bit too much and starts free styling. At that point, the clinician must pivot with theatrical composure, as if this was the plan all along, and gently convince the body to reconsider its life choices. Enter Vitamin K, the polite memo to the liver that productivity is once again expected; Prothrombin Complex Concentrate (PCC), essentially clotting factors arriving like an overprepared emergency committee; and the delightfully specific Idarucizumab and Andexanet alfa, which function as the rare “ctrl+Z” buttons in medicine. All the while, the clinician must maintain a reassuring calm because nothing stabilizes a patient quite like someone who looks as though reversing a potentially catastrophic bleed is merely a minor administrative correction, rather than an intense, real-time negotiation with a coagulation system that occasionally behaves like it has read the textbook and chosen rebellion. #Dabigatran #Idarucizumab #FXaInhibitors #Apixaban #Rivaroxaban #Edoxaban #Andexanetalfa #ProthrombinComplexConcentrate #PCC #aPCC #Plasma #FFP #Bleeding #hemostasis
Pulse oximetry and Capnography:

Essential tools for monitoring respiratory health, but they serve different purposes:

Pulse Oximetry: 
Measures
Pulse oximetry and Capnography: Essential tools for monitoring respiratory health, but they serve different purposes: Pulse Oximetry: Measures blood oxygen saturation (SpO₂) and pulse rate. Normal SpO₂ is 95–100%. It’s useful for tracking oxygenation but may delay detecting ventilation issues. Capnography: Monitors exhaled CO₂ (EtCO₂) and respiratory rate. Normal EtCO₂ is 35–45 mmHg. It detects ventilation problems faster and provides real-time updates. While SpO2 monitors oxygenation (often delayed), EtCO2 measures metabolic perfusion and ventilation. Continuous capnography detects almost 6 times more potential respiratory events than SpO2 alone. #EtCo2 #SpO2 #Pulseoximetry #Capnography #ventilation #respiratory #oxygenation #ICU #respiratoryarrest #codelue #CPR
Cervical Artery Dissection (CAD): 

🩸Occurs as a result of the interplay among risk factors, minor trauma,
Cervical Artery Dissection (CAD): 🩸Occurs as a result of the interplay among risk factors, minor trauma, anatomic & congenital abnormalities, & genetic predisposition. 🩸Diagnosis can be challenging both clinically & radiologically. 🩸In those with acute ischemic stroke attributable to CAD, acute treatment strategies such as thrombolysis & mechanical thrombectomy are reasonable in otherwise eligible patients. 🩸AHA suggest that the antithrombotic therapy choice be individualized & continued for at least 3 to 6 months. 🩸Risk of recurrent dissection is low, & preventive measures may be considered early after the diagnosis & continued in high-risk patients. @AHAScience @American_Heart #stroke #cad #dissection #cervicalartery #cva
The recommended pre-operative workup for patients taking anticoagulants involves stratifying both thromboembolic & bleeding risk, determining
The recommended pre-operative workup for patients taking anticoagulants involves stratifying both thromboembolic & bleeding risk, determining appropriate timing for medication interruption, & deciding whether bridging therapy is needed. Specific approach depends on the type of anticoagulant, renal function, and procedure-related bleeding risk. • Direct Oral Anticoagulants (DOACs) o For apixaban, rivaroxaban, and Edoxaban, the American College of Chest Physicians recommends stopping these agents 1-2 days before low-to-moderate bleeding risk procedures and 2 days before high bleeding risk procedures. • For dabigatran, interruption timing depends on renal function. o With normal renal function (CrCl ≥50 mL/min), stop 1-2 days before low-risk procedures and 2 days before high-risk procedures. o With impaired renal function (CrCl <50 mL/min), extend interruption to 3-4 days before high-risk procedures due to predominantly renal clearance. #apixaban #rivaroxaban #Edoxaban #dabigatran #DOACs #preoperative #perioperative #Warfarin #CHA₂DS₂-VASc #antithrombotic #anticoagulant #guidelines
Urinary Tract Infections (UTI)

1. Women have a lifetime risk of 53% of experiencing UTI. 
2. Men
Urinary Tract Infections (UTI) 1. Women have a lifetime risk of 53% of experiencing UTI. 2. Men prior to age 50, have lifetime risk is 14%. 3. Risk of experiencing a UTI increase with age in both sexes. Classification: Uncomplicated UTI Infection confined to the bladder in afebrile women or men. Complicated UTI: Infection beyond the bladder in women or men. 1. Pyelonephritis 2. Febrile or bacteremic UTI 3. Catheter-associated (CAUTI) 4. Prostatitis. Catheter- Associated UTI (CA-UTI) 1. CAUTIs are one of the most common healthcare-associated infection (HAI). 2. About 75% of UTIs developed in hospitals are associated with a urinary catheter. 3. 15-25% of hospitalized patients receive urinary catheters during their hospital stay. 4. CAUTIs are associated with increased morbidity, mortality, healthcare costs & LOS. 5. They are preventable. #UTI #CAUTI #IDSA #KIDNEYS
The diagnosis of UC is best made with endoscopy and mucosal biopsy for
 histopathology. Laboratory studies
The diagnosis of UC is best made with endoscopy and mucosal biopsy for histopathology. Laboratory studies are helpful to exclude other diagnoses and assess the patient's nutritional status, but serologic markers can assist in the diagnosis of inflammatory bowel disease. Radiographic imaging has an important role in the workup of patients with suspected inflammatory bowel disease and in the differentiation of UC from Crohn disease by demonstrating fistulae or the presence of small bowel disease seen only in Crohn disease. #UC #IBD #ulcerativecolitis
Invasive Fungal Infection (IFI)

Invasive fungal infections are severe infections in which fungal pathogens invade normally sterile
Invasive Fungal Infection (IFI) Invasive fungal infections are severe infections in which fungal pathogens invade normally sterile body sites. They predominantly affect immunocompromised patients, including those with neutropenia, hematologic malignancies, solid organ or stem cell transplants, and prolonged corticosteroid or broad-spectrum antibiotic use. Common Pathogens Candida species (most frequent cause of bloodstream infections) Aspergillus species (primarily pulmonary infections) Cryptococcus species (commonly CNS involvement) Emerging molds and rare fungi in high-risk populations Risk Factors Immunosuppression (neutropenia, chemotherapy, transplant) Indwelling catheters or prosthetic devices Prolonged ICU stay and broad-spectrum antibiotic exposure Clinical Presentation Symptoms vary by site of infection and may include fever, organ dysfunction, respiratory distress, or neurological deficits Diagnosis Culture and microscopy from sterile sites Antigen/antibody testing (e.g., β-D-glucan, galactomannan, cryptococcal antigen) Imaging studies (CT, MRI) for organ involvement Histopathology when feasible Management Early initiation of targeted antifungal therapy Source control, including removal of infected catheters or drainage of abscesses Selection of therapy guided by species identification and antifungal susceptibility Multidisciplinary approach with infectious diseases consultation Prognosis Dependent on timely diagnosis, host immunity, and pathogen virulence Delays in treatment significantly increase morbidity and mortality #candida #candidemia @invasivefungal #fungemia
Orbital cellulitis is what happens when your sinuses throw a tantrum and decide to drag your
Orbital cellulitis is what happens when your sinuses throw a tantrum and decide to drag your eyeball into the mess. It starts innocently enough, just a stuffy nose, maybe a little sinus infection and then, BAM! The bacteria stage a prison break and march straight into the orbit like, “We live here now.” The eyelid swells up like it lost a boxing match, the eye starts bulging like it’s trying to escape the drama, and suddenly you’ve got a look that says, “I’ve seen things.” Pain with eye movement? Naturally. Your eye muscles are basically shouting, “We did not sign up for this nonsense!” Vision might blur a bit, because apparently the bacteria want to direct their own action movie from inside your face. The emergency room staff take one look and go, “Yep, that’s not conjunctivitis, that’s DEFCON 1.” Then come the IV antibiotics, biochemical superheroes, charging in to clean up the microbial chaos. Radiologists join the scene with their CT scanners, narrating the plot twist: “Ah, the infection’s gone orbital!” And if the pus really sets up camp, a surgeon might need to swoop in for a cleanup mission, like the final episode of a very dramatic season. Don’t ignore that sinus infection, it might be plotting an invasion. And if your eye ever looks like it’s trying to call for backup, it’s time to get to the hospital before the bacteria win an Oscar for Best Infectious Performance. #orbitalcellulitis #postseptalcellulitis
Tale of Two Staphylococci: 
Methicillin-Sensitive Staphylococcus aureus (MSSA) and Methicillin-Resistant Staphylococcus aureus (MRSA). 

MSSA arrived quietly,
Tale of Two Staphylococci: Methicillin-Sensitive Staphylococcus aureus (MSSA) and Methicillin-Resistant Staphylococcus aureus (MRSA). MSSA arrived quietly, without unnecessary drama. Predictable and courteous, he followed the usual clinical trajectory of fever, positive blood cultures, appropriate management, and steady improvement. The team appreciated his transparency; he respected the rules of engagement and left promptly once his source was addressed. There were no consult wars, no prolonged discussions but just a clean resolution and a satisfied discharge summary. MRSA, however, was a different story altogether. He entered the bloodstream with confidence and defiance, fully aware of his reputation. The moment his name appeared on the microbiology report, the atmosphere changed. The primary team sighed, pharmacy frowned, and infection control started whispering about isolation protocols. MRSA thrived on attention and turning every simple bacteremia into a multidisciplinary production involving ID, nursing, infection prevention, and sometimes even hospital administration. He lingered longer than anyone wanted, testing the limits of patience, policy, and resource allocation. With coordinated teamwork, careful management, and more meetings than anyone cared to count, MRSA was finally cleared from the bloodstream. #MSSA #MRSA #ID #bacteremia #staphylococcus
Picture MRSA-PCR as the hospital’s ultimate crime-fighting superhero team, but instead of capes and laser eyes,
Picture MRSA-PCR as the hospital’s ultimate crime-fighting superhero team, but instead of capes and laser eyes, it wields test tubes and genetic scanners. MRSA the notorious “bad boy” of bacteria, likes to sneak into hospitals, pick fights with antibiotics, and then hide in plain sight like a germy ninja. Old-school tests stumble around like detectives in a black-and-white movie, muttering “the culture will be ready in a few days,” while MRSA laughs and throws confetti in the background. But PCR? Oh no, PCR doesn’t waste time. It storms in like a caffeinated detective on double espresso, grabs a swab, and yells: “Aha! There’s the MRSA DNA, hiding in your nose like it pays rent!” In just hours, the mystery is solved, the bacteria is busted, and the lab gets to feel like it just solved the medical equivalent of a bank heist. Fast, flashy, and way more reliable than waiting around for Petri dishes to gossip, MRSA-PCR is basically the hospital’s drama-filled reality show where the germs always get exposed. #mrsa #PCR #Methicillin-ResistantStaphylococcusaureus