Embryology of eye mnemonic

Hello friends!

Here's is the simplest way to remember embryology of eye.

*Out of all layers (ecto,meso, endo), the endoderm doesn't contribute to the embryology of eye.

* Mesoderm forms - extraocular muscles

* Rest of the structures are derived from ectoderm.

* Surface ectoderm forms the structures which are visible to us from outside like Corneal epithelium

Conjunctival epithelium

 Lacrimal gland

 Lens ( important)

*Neuroectoderm forms neural structures like

Retina

Ciliary body ( not muscles)

Iris - both sphincter and dilator pupillae

Optic nerve

* Neural crest derivatives are 

Meninges of optic nerve

Schwann cells

Ciliary ganglion

Ciliary muscles 

For the remaining derivatives, watch the following picture.

Thank you.

Dr. Madhuri Reddy. 

Kartagener syndrome mnemonic

 Hi!

Kartagener syndrome (primary ciliary dysfunction, aka immotile cilia syndrome) mnemonic :-

Toxoplasmosis classic triad mnemonic

 Hi!

Toxoplasmosis classic triad in neonates mnemonic: CATS 

- CAlcifications (intracranial)

- Tension hydrocephalus

- See (Chorioretinitis)

Also, check out this video mnemonic by IkaN

- Jaskunwar Singh

ARDS management mnemonic

 Maintenance “DOSE”

Dry Lungs - “Dry lungs -Happy lungs”

• Maintain negative fluid balance to reduce pulmonary edema

Open but not Over-distended 

Management of asymptomatic carotid atherosclerotic disease and carotid artery stenosis mnemonic

Super short post!

A) Asymptomatic

≥80% stenosis: Carotid endarterectomy

≤79% stenosis: Medical management

Mnemonic AGES: Asymptomatic Greater than Eighty Surgery

B) Symptomatic

≥70% stenosis: Carotid endarterectomy

Mnemonic SSS: Symptomatic Seventy Surgery

50%-69% stenosis

Male: Carotid endarterectomy

Female: Medical management

Mnemonic MMM: Males Manage More than fifty with surgery

<50% stenosis: Medical management

That's all!

-IkaN

Creatinine clearance in elderly - basic notes

 Hi!

Elderly people have a decrease in creatinine clearance (CrCl), which means an increase in serum Cr. It is observed that annual rate of this decrease in CrCl is approximately 1 ml/min. after the age of 50 years.

Therefore, it is important to calculate the dose and dosing intervals of nephrotoxic drugs (eg., aminoglycosides) in these patients in order to prevent the precipitation of ARF.

In general,

CrCl <100 ml/min is abnormal.

However, CrCl <10 ml/min signifies the onset and worsening of acute renal failure.

Note -

• GFR is directly proportional to CrCl.

• GFR decreases by age, but not always accompanied by rise in Cr.

• Cockcroft-Gault formula is commonly referred to for calculating CrCl.

CrCl = (Ucr × V)/Pcr (~GFR)

• Double the Cr = Half the GFR.

Note that those patients with signs of worsening diabetes and resulting glomerulopathies, an increase in both GFR and CrCl is seen, which thus causes hyper filtration injury. 

That's all

- Jaskunwar Singh

Rigler's triad mnemonic

 Hi!

Rigler's triad in gall stone ileus mnemonic:

GALL in GIT

Belimumab mnemonic

What is belimumab?

Belimumab is a  monoclonal antibody directed against soluble B lymphocyte stimulator (BLyS).

Belimumab is used in the treatment of? 

Systemic Lupus Erythematosus (SLE)

Mnemonic: Belly Selly SLE (rhymes! sing it enough times and you will never forget)

At present, belimumab is indicated as add-on therapy in adults with active, antinuclear antibody or anti-dsDNA-positive SLE with a high degree of disease activity in the skin and/or musculoskeletal systems that remain moderately to severely active despite optimized standard immunosuppression. 

Patients with severe lupus nephritis or active CNS lupus are not the candidates for belimumab.

That's all!

-IkaN

Direct oral anticoagulants (DOACs) dosing for stroke prevention in atrial fibrillation mnemonic

Hi everyone!

Here are some DOAC dosing mnemonics for atrial fibrillation! 

RivarOxaban: Once daily

Apixaban: Twice daily 

Dabigatran: Twice daily

EdOxaban: Once daily

Mnemonic: Drugs with O have Once-daily dosing. 

Rivaroxaban: 20 mg once daily with the evening meal (creatinine clearance [CrCl] >50 mL/minute); or 15 mg once daily with the evening meal (CrCl ≤50 mL/minute).

Mnemonic: R without the straight line | looks like 2 to me for 20 mg!

Apixaban: 5 mg twice daily (CrCl >50 mL/minute); or 2.5 mg twice daily for those with any two of the following: age ≥80 years, body weight ≤60 kg, or serum creatinine ≥1.5 mg/dL.

Mnemonic: Apixa has 5 letters for 5 mg!

Dabigatran: 110 mg BID or 150 mg BID (CrCl >30 mL/minute).

European labeling suggests dose reduction in patients older than 75 years (eg, 150 mg orally once per day or 110 mg orally twice per day).

Edoxaban: 30 mg (weight ≤60 kg) or 60 mg (weight >60 kg) orally once daily.

That's all!

Remember that the dosing varies for VTE treatment and prophylaxis so do not apply these mnemonics for VTE.

-IkaN

Formulation, absorption and associated side effect of dabigatran

Did you know that the absorption of dabigatran etexilate is dependent on an acid environment in the stomach?

This is why it is formulated together with tartaric acid pellets. These pellets provide an acidic environment, which increases drug dissolution and absorption, regardless of variations in gastric pH. This is also why the absorption is not affected by the coadministration of a proton pump inhibitor.

A lower pH is associated with dyspepsia, esophagitis, and plays a part in the increased risk of gastrointestinal bleeding.

-IkaN

Simvastatin combination with fibrates in clinical practice

 Hi!

High-yield in clinical practice:

DO NOT combine simvastatin with gemfibrozil (class-X interaction; high risk of acute liver damage and rhabdomyolysis). Inhibition of CYP450 enzyme by gemfibrozil plays the role in increasing levels of simvastatin 2-3x.

Combination of simvastatin with fenofibrate is relatively safer, although close observation and regular monitoring is required (class-C interaction). Serum levels of simvastatin remain unchanged.

- Jaskunwar Singh

Mechanical Ventilation- Physiology

Mechanical Ventilation- Physiology

• Non-Invasive Ventilation is of two types:

1. CPAP = Continuous Positive Airway Pressure: where continuous pressure is exerted during inspiration and expiration 

2. BiPAP = Bilevel Positive Airway Pressure: where higher pressures are applied during inspiration and lower pressures during expiration

• Use of CPAP 🡪increases intra-thoracic pressure 🡪 decreases Venous Return (VR) 🡪 decreased Right Ventricular (RV) preload.

• PEEP > CVP 🡪 Preload decreases

• PEEP > PAP 🡪 Afterload decreases (where PEEP = Positive end expiratory pressure, CVP = Central venous Pressure, PAP = Pulmonary arterial pressure)

• Cardiac Transmural Pressure = pressure difference between inside of the heart and intrathoracic pressure. When CPAP is given, intrathoracic pressure increases 🡪 transmural pressure decreases 🡪Afterload decreases

• CPAP: Increases inspiratory flow 🡪 Increases Tidal Volume (TV) 🡪 helps in unloading the inspiratory muscles to decrease work of breathing 🡪decrease dyspnea

• Increase in expiratory pressure (like with CPAP) in patients with COPD helps in increasing ventilation and oxygenation. This might seem contradictory (how does increased pressure from the ventilator into the lungs during expiration help in increasing ventilation. It seems counter intuitive!). In order to understand this, think about how PURSED LIP breathing in COPD patients actually help them to breathe better!

• COPD patients need an additional external PEEP in addition to inspiratory support to improve diaphragmatic function.

• PRE-OXYGENATION: with 100% O2 for at least 3 minutes helps to prolong the apnea time (Apnea time = time to reach 88 to 90% SpO2). The FRC (functional residual capacity) is the reservoir during the period of apnea. 

• LUNG INFLATION

1. Moderate inflation: pulmonary stretch receptors reduce vagal stimulation 🡪 moderate tachycardia

2. Hyperinflation: Stimulates Pulmonary C and J receptors 🡪 increased vagal signaling 🡪 bradycardia

• LUNG PROTECTIVE VENTILATION
  - Low Tidal Volume
  - High PEEP (to keep lungs open, prevent alveolar collapse)
  - Low plateau Pressure

• Esophageal Balloon: Can help in measuring pressures to deliver adequate PEEP and TV.

• AUTO PEEP
  -Auto PEEP is the difference between alveolar pressure and the pressure at the proximal airway.
  -At the exact end of expiration, ideally, we expect the pressure in the alveoli to be zero as all air should have exited from the alveoli. But when some gas is retained, it leads to the development of Auto PEEP.
  -Auto PEEP is measured by end expiratory hold maneuverer.
  -If elastic forces are high and resistive forces (eg resistance in bronchi etc) are low, auto PEEP is minimal or absent.
  -Increase in resistive forces 🡪 passive exhalation time increases to ensure complete emptying of expiratory tidal volume.

• TIME CONSTANT:
  -Time required for lungs to expire 63% of initial volume during expiration.
  -So total of 3 time constants would be needed to exhale 96% of TV out.
  -So, if we keep Inspiratory: Expiratory time as 1:3, Auto PEEP would not occur.
  -Diseases lung is inhomogeneous and can have different time constants for different parts 🡪 Expiratory flow limitation.
  -Flow limitation = dynamic condition that occurs when gas flow cannot be increased by increasing alveolar pressure or reducing airway opening pressure.

• Dynamic hyperinflation is not the same as air trapping
  -In Asthma, inspiratory activity continues into early expiration 🡪 dynamic hyperinflation, without air trapping
  -In Recumbent obese patients, air trapping occurs without dynamic hyperinflation.

• TRACHEOSTOMY
  -Increased risk of infection as compared to Endotracheal Tube (ET) because:
  1. Lack of humidification
  2. Absence of cough, hence decreased clearance of secretions
  3. Reduced ciliary function
  -Reduced work of breathing as compared to ET because:
  Tracheostomy tubes are smaller, more rigid 🡪 less turbulent airflow 🡪 reduces expiratory flow limitation, dynamic hyperinflation, auto-PEEP 🡪 reducing work of breathing
  
  

Written by Amrin Kharawala

Lyme's disease - a review

 Hi!

Lyme's disease/ Lyme borreliosis

A patient with a typical history of frequent visits to the woods with bull's eye rash, neurologic features, cardiac abnormalities, and musculoskeletal features.

SURGICAL DEBRIDEMENT

REQUIREMENTS: Written Informed Consent, Sterile gauze pieces, Saline, Sterile working surface (A plastic drape is generally spread over the table), Syringe with local anaesthesia, Scalpel with 15 no. blade with toothed forceps   (or a sharp curette), Sterile gauze pieces and dressing 1)    Local anesthesia (may not be required for diabetic ulcer as it is painless) 2)    Use saline/ antiseptic solution to irrigate the wound (betadine solution is better avoided as it hampers wound healing) 3)    Using all aseptic precautions remove the dead tissue using 15 no. blade and toothed forceps 4)    Use short even strokes with minimal pressure (swapping movements) to avoid injury to underlying structures and minimize any bleeding that might occur. -All devitalized tissue must be excised until bleeding occurs -Muscle that is pale or dark in colour, does not contract on pinching and does not bleed on cutting must be removed -Try to scrape superficially at the edge of ulcer as this is where the healthy tissue grows 5)    The wound is covered up with either wet or dry dressing 6)    Advice to patient:  No weight bearing on the wound Reassess and dress as required Tetanus immunization and antibiotics as indicated Written by our guest author Pratik Mundada #Ae(ONE)INTERN

Lone Atrial fibrillation mnemonic

 "lone AF"

Mnemonic - "P- LONE"

P 

• Paroxysmal & Persistent or Permanent 

L 

• Less than 60 years of age 
• Low  risk of systemic embolization

O 

• have a CHA₂DS₂-VASc score of 0

N

• No evidence of cardiopulmonary or structural heart disease.   
• No anticoagulant therapy is not indicated.

E 

• Keep an Eye on it , no additional treatment is required.

Thank you!

Menkes disease and Wilson's disease - DDx

 Hi!

Okay so maybe they are the two of the options for a patient's clinical scenario question and you have a blurred memory for which is which in context to copper metabolism?

Let's clear the basic facts here...

Ampicillin-rash in infectious mononucleosis

 Hi!

Penicillins such as amoxicillin and ampicillin are currently not recommended in patients with infectious mononucleosis with bacterial secondaries (streptococcal tonsillo-pharyngitis). Why?

The Indian Intern

Hi! 🤠
While doing procedures as interns, it is difficult to look for concise sources to know how-best-to-do-it.
With the time constraints some details may be missed.

So, we, students of 2016 batch Seth GSMC and KEM Hospital, Mumbai, India have tried to compile information regarding such procedures (both basic and some that we may get a chance to perform).
Reliable sources and tips from our seniors and resident doctors have been used.

With limited resources in India, we can definitely do with a Freakshake🥤 of practical hacks and standard procedures😉🙃

PS: This is meant to COMPLEMENT, and not REPLACE practical skills to improve patient care

From continued efforts of 

Anveshi Nayan (CNS)

Ayushi Gupta (CVS)

Devi Bavishi (MSK)

Here is a list of all the procedure with their links, so you can directly access them from here.

Bookmark this page and Happy learning :)!

BASIC PROCEDURES:

1. Venepuncture
2. Arterial puncture
3. IV cannulation and IV infusion
4. Nasogastric tube insertion
5. Injection techniques
6. Nasopharyngeal and Throat swab collection
7. Wound swab collection
8. Urinary Catheterization

MEDICINE

1. Central Venous catherisation
2. Ascitic paracentesis
3. Thoracocentesis
4. Lumbar Puncture

SURGERY

1. Steps common to all minor procedures
2. Basic principles of bandaging
3. AK Stump Bandaging
4. BK Stump bandaging
5. Head bandaging
6. Magnesium sulfate and glycerine dressing
7. Management of Cut and Lacerated Wound (CLW)
8. Debridement
9. Maggot removal
10. Corn removal
11. Lipoma excision
12. Excision of Sebaceous cyst
13. Incision and Drainage
14. Suturing techniques
15. Suture and stapler removal
16. Surgical scrubbing
17. ICD insertion
18. Toe nail removal
19. Preoperative surgical patient preparation

ORTHOPEDICS

1. Distal radius fracture reduction
2. Slab application
3. Plaster removal
4. Trigger finger
5. Reduction of anterior dislocation of shoulder

ANESTHESIA

1. CPR
2. Spinal anesthesia
3. Endotracheal intubation
4. Subcutaneous (local) anesthesia

OBGY

1. Normal Labor
2. Pap smear
3. Cardiotocography
4. Contraception - CopperT
   

PEDIATRICS

1. Mantoux test 
2. Nebulization

HEMATOLOGY

1. Blood donation
2. Blood product transfusion

OPHTHALMOLOGY

1. Schirmer's test
2. Automated perimetry
3. Lacrimal sac syringing
4. Tonometry
   

OTORHINOLARYNGOLOGY

1. Ear syringing

FORENSIC MEDCINIE

1. Medicolegal Case

DERMATOLOGY

1. Skin tag removal
2. Skin biopsy

BLOOD PRODUCTS TRANSFUSION

PRE-REQUISITES & PROCEDURE: 

• In emergency lifesaving conditions, blood is issued without replacement after recommendation from treating doctor/ authorized person. 

• For high risk patients, attendants are told to arrange blood in advance. 

Prior to requesting the transport of blood products, ensure: 

• The physician orders for transfusion have been documented. 

• Informed consent has been obtained. 

• Blood is received from established blood banks only against a requisition form along with the sample for grouping and cross-matching, duly signed by the medical staff. 

• Staff nurse/attendant collects blood components from blood storage, transports blood component in insulated container to location and delivers it to nurse in charge. 

• Inspect for abnormal color, cloudiness, clots and excess air. 

• Check with compatibility slip to ensure that the following information on the unit of blood is same as that on the blood compatibility: 

✓ Blood unit number 

✓ Collection Date 

✓ Expiry Date 

✓ ABO blood group and Rh group 

✓ Patient's name matching with the requisition slip /case file 

✓ No. of units supplied 

• Blood is warmed

• The patient has an IV line (usually a pink one) established with saline. (First take an IV set. Seal open one port in blood bag. Put one end of IV set in bag. Remove the air from the tube by filling with blood and then administer.)

RATE OF TRANSFUSION

✓ For Adults: Start with 1mL/min. If no  reaction, increase to 4mL/min after 15 min. 

✓ For Pediatric transfusion: Advice  taken from treating physician.

MONITORING: 

• Take 3-4 readings of HR, BP, RR and Temperature (preferably every 15 min) for monitoring for the Blood Transfusion reactions. 

• If anything abnormal happens, Immediately stop the transfusion and call a senior. 

• Blood and blood bags are discarded as per BMW policies.

VIDEO LINK: https://youtu.be/Pf8IPqmxBUI  

Written by our guest author Ayushi Gupta

Illustrations by Anveshi Nayan

#Ae(ONE)INTERN

Throat swab and Nasopharyngeal swab

REQUIREMENTS: Swab & transport media, Tongue depressor, PPE (Non- sterile disposable gloves, N95, Face Shield, gown)

 

 

PROCEDURE: 

● Follow universal precautions

● Open the packet containing swab and the viral transport medium containing bottle and write patient's details on the bottle label in capitals

Remove the swab stick, holding it at the end of the stick

FOR THROAT SWAB: 

● The patient should sit in front of adequate light source with head tilted backwards. Stand in front of the patient. Ask the patient to open his mouth wide and say 'AH'.

● Gently depress the tongue with tongue depressor so that throat is well exposed.

● Press the swab firmly with a slight rotational movement for at least 30 seconds over the back of the throat  

● AVOID TOUCHING THE TONGUE CHEEKS OR LIPS WITH THE SWAB 

FOR NASPHARYNGEAL SWAB: 

● Ask the patient to clear nose of any secretions

● Ask the patient to tilt back the head to about 70 degrees

● Insert the swab along nasal septum just above the floor of nasal passage till a resistance is felt

● Rotate the swab against the mucosa for minimum 10-15 seconds (30 seconds if possible). 

● Collect sample from one nostril only if the swab gets adequately soaked by secretions. If not, collect sample from both the nostrils

●For covid-19 suspect, to send for RAT only nasopharyngeal swab is required and for RT-PCR both oropharyngeal and nasopharyngeal swab

● Both the swabs should be put into transport medium tube immediately and push the swab to the bottom

●The swab stick may have to be broken (at given marking) to fit into test tube containing transport medium

● Put these tubes in a primary receptacle

● This may be covered with absorbent material (cotton/ paraffin)

● This is then put in a zip lock pouch

● Put in a box containing ice pack

 

 

● Place forms and samples separately 

● Wash hands with soap and water and dispose remaining things in proper bags

VIDEO LINK: 

THROAT SWAB: https://youtu.be/EurY3w84Ud0 

NASOPHARYNGEAL SWAB: https://youtu.be/DVJNWefmHjE  

Written by our guest author Shrinivas Surnar

Illustration by Ayushi Gupta and Anveshi Nayan

#Ae(ONE)INTERN

HEAD BANDAGING

1) Put dressing on wound of the patient

2) Using a Roller Bandage (crepe or cotton bandage, 4-6 inch size), roll the bandage on the anchoring side first

Anchor: It is the first turn of roll to support the bandage 

i) For wound on top of head, side of head, ears, cheek or chin-around forehead and back of head 

ii) For wound on forehead and back of the head-around chin and top of head

 

3) First loose end of bandage should be untucked and ask patient or relative to hold this first loose end

4) Roll the bandage around the forehead and back of head for two rounds

5) Then cross the bandage by first loose end, continue by bandaging on pressure pad on tops of the head and through chin

 

 

6) Finish up the rolling and tie up the other end with the first end, and tuck the loose end

 

 

VIDEO LINK: https://www.youtube.com/watch?v=MD5YnNIox4o&feature=youtu.be

Written by our guest author Varad Chandak

Illustrations by Varad Chandak

#Ae(ONE)INTERN