Category Archives: Medical

Osteoporosis

Various causes of secondary osteoporosis: coeliac disease,  hyperthyroidism, hypogonadism, IBD, chronic liver disease, JIA, chronic renal, immobility.

Consider calculating fracture risk if secondary osteoporosis or previous fragility fracture, frequent use of systemic steroids, FH hip fracture, low BMI, smoking/alcohol etc.

Use online tools FRAX or QFracture to estimate 10yr predicted fracture risk (FRAX includes previous bone mineral density value if DXA done, not necessary).  If risk is in the region of “intervention threshold” for proposed treatment, consider doing DXA and recalculate FRAX.  Tools may underestimate risk if history of multiple fractures, previous vertebral fracture, high dose steroids, other causes of secondary osteoporosis. These tools are meant for adults over 30-40yrs however.

“Intervention thresholds” are NOT covered in guideline, it says see local guidance!

For WOS, no Dexa for coeliac until in 20s.

[NICE osteoporosis guideline ]

Cefalosporins

Cefalosporins have a broader activity than penicillins, esp 3rd generation eg cefotaxime, ceftriaxone which are effective against most gram positives and gram negatives.

Good for meningitis (penetrate inflamed meninges at high dose) but not effective against pseudomonas, enterococcus, listeria, MRSA, and not that great against normal staphs so beware if possible line infection or neonatal meningitis. Some pneumococci can be resistant (1st line meningitis treatment in US is cef with vanc).

Ceftriaxone is drug of choice for Lyme with complications; it is not recommended for immediate treatment of meningococcal disease as any subsequent calcium containing infusions will reduce its plasma levels.

Ceftriaxone also eradicates meningococcal colonization – since cefotaxime is essentially equivalent, no reason to switch just for this indication.

Contraindications to ceftriaxone:

  • Concomitant treatment with intravenous calcium (including total parenteral nutrition) in premature and full-term neonates—risk of precipitation in urine and lungs (fatal reactions) ;
  • full-term neonates with jaundice, hypoalbuminaemia, acidosis, unconjugated hyperbilirubinaemia, or impaired bilirubin binding—risk of developing bilirubin encephalopathy;
  • premature neonates less than 41 weeks corrected gestational age

Health anxiety

DSM-5 has “illness anxiety disorder”, defined as preoccupation with the idea that you’re seriously ill, based on normal body sensations (such as a noisy stomach) or minor symptoms (such as a minor rash), to the degree that it gets in the way of normal life. Other features are persistence of such ideas over 6 months, finding little or no reassurance from negative test results or a doctor’s reassurance, repeatedly checking body, avoiding people, places or activities for fear of health risks.

In other words, hypochondriasis. Which gets its name from the idea that such feelings came from liver/spleen/gall bladder (“melancholy” – black bile).  William Cullen, in Edinburgh in the 1790s, appeared to take a particular interest in this.

For the sake of diagnosis, this disorder requires the absence of symptoms, which excludes the large group of people who have similar preoccupation and fears about non-specific or unexplained signs and symptoms.

Health anxiety is therefore a broader concept, and can include anyone who is more desperate for relief from worry, than for relief from actual symptoms.

Cyberchondria = combination of increased pathologisation of society, and ability to browse the internet.  Because provides the opportunity to find very serious, extremely unlikely explanation for problems.

Diagnosis of health anxiety is well accepted by patients if explained respectfully!

[BMJ 2016;353:i2250]