Tuesday, August 15, 2017

Paramedian pontine reticular formation and MLF

Hello :)

PPRF = Paramedian pontine reticular formation 
MLF = Medial longitudinal fasciculus 


-Upasana Y. :) 

Ptosis in Horner's syndrome vs oculomotor nerve palsy

Hello :)

That's all.
- Upasana Y. :) 

Third nerve palsy

Hello :)

Before starting with the III nerve, Let us understand the term.

According to TABER'S medical dictionary, We need to understand 3 main type of palsy here.

1.NUCLEAR palsy :- Paralysis caused by lesion of the nuclei in CNS.
2.OCULAR palsy :- Paralysis of extraocular nd intraocular muscles.
3.MUSCULAR palsy :- Loss of the capacity of muscle to contract. It may be due to structural or functional disorders
-in the muscle at the myoneural junction,
-in efferent nerve fibres,
-in the cell bodies of nuclei of origin of the brain or of the gray matter of the spinal cord,
-in conducting pathways of the brain or spinal cord,
-in motor centres of the brain.

Third cranial nerve supplies
1. EXTRAOCULAR MUSCLES
-Superior rectus
-Inferior oblique
-Medial rectus
-Inferior rectus

2.INTRAOCULAR MUSCLES
-Levator palpebral superioris
-Ciliary body
-Iris sphincter msucle

THE LOCALIZATION OF THIRD NERVE LESION 
-Supranuclear
-Nuclear
-Fascicular
-Basilar
-Intra-Cavernous sinus
-Superior orbital fissure
-Intra Orbital part

CLINICAL FEATURES OF THIRD NERVE PALSY:-
1. Ptosis - paralysis of LPS muscle.
2. Deviation – out, down and intorted (unopposed action of LR and SO).
3. Ocular movements:
• Adduction – MR
• Elevation – SR and IO
• Depression – IR
• Extorsion – IR and IO
4. Pupil is fixed and dilated – paralysis of sphincter pupillae muscle.
5. Accommodation is completely lost – paralysis of ciliary muscle.
6. Crossed diplopia – paralytic divergent squint.
7. Head posture – If the pupillary area is uncovered, head takes a posture consistent with the directions of actions of the paralysed muscles, i.e., head is turned on the opposite side, tilted towards the same side and chin is slightly raised. (Pathways between vestibular nuclei and oculomotor nuclei. These are Intranuclear pathway.)


 FEATURES AND CAUSES OF THIRD NERVE LESIONS AT VARIOUS LEVELS

1. Supranuclear lesions
• Lesions of the cerebral cortex and supranuclear pathway produce conjugate paresis which affect both eyes equally.
• In supranuclear lesions although position and movements of the eyes are abnormal, they maintain their relative co-ordination and produce no diplopia.

2. Nuclear lesions
• Lesions involving purely the third nerve nucleus are relatively uncommon.
• Common causes include ; vascular diseases, demyelination, primary tumors and metastasis
• Lesions involving entire nucleus cause
-an ipsilateral third nerve palsy with ipsilateral sparing and
-contralateral weakness of elevation. 
• Lesions involving paired medial rectus subnuclei (ventromedial nucleus) cause a wall-eyed bilateral internuclear ophthalmoplegia ( WEBINO ) characterised by defective convergence and adduction.

3. Fascicular lesions 
• Causes are similar to nuclear lesions. 
-Benedikt syndrome involves the fasciculus as it passes through the red nucleus and is characterised by ipsilateral 3rd nerve palsy and contralateral extrapyramidal signs such as hemitremor. 

-Weber syndrome involves the fasciculus as it passes through the cerebral peduncle and is characterised by ipsilateral 3rd nerve palsy and contralateral hemiparesis. 

-Nothangel syndrome involves the fasciculus and the superior cerebellar peduncle and is characterised by ipsilateral 3rd nerve palsy and cerebellar ataxia. 

-Claude syndrome is a combination of Benedikt and Nothangel syndromes.

4. Lesions involving basilar part of the nerve 
• As the nerve runs in the subarachnoid space at the base of skull unaccompanied by any other cranial nerve, isolated third nerve palsies are frequently basilar. 
• Causes :
 1. Aneurysms at the posterior communicating artery cause isolated third nerve palsy with involvement of pupil.
 2. Extradural hematomas which may cause tentorial pressure cone with downward herniation of the temporal lobe. This compresses the third nerve as it passes over the tentorial edge. Initially there occurs fixed, dilated pupil, which is followed by a total third nerve palsy. 
3. Diabetes causes isolated 3rd nerve palsy with sparing of the pupillary reflexes.

5. Lesions involving intracavernous part of the nerve 
• Because of its close proximity to other cranial nerves, intracavernous 3rd nerve palsies are usually associated with involvement of the 4th and 6th nerves, and the 1st division of trigeminal nerve.
-PULSATILE EXOPHTHALMOS can also be seen.
• In intracavernous 3rd nerve palsy, pupil is spared. Sometimes, pupil may be constricted owing to inv of sympathetics.


• Causes : 
1. Diabetes may cause vascular palsy. 
2. Pituitary apoplexy – may cause a third nerve palsy as a result of hemorrhagic infarction of a pituitary adenoma (after child birth), with lateral extension into cavernous sinus. 
3. Intracavernous lesions – aneurysms, meningiomas, carotid-cavernous fistulae and Tolosa-Hunt syndrome (granulomatous inflammation).

6. Lesions of the intraorbital part of the nerve 
• May cause isolated extraocular muscle palsies or may involve either superior division or inferior division or both. 
• Causes : orbital tumors, pseudotumors, trauma and vascular diseases.

7. Lesions of pupillomotor fibres 
• B/w the brainstem and the cavernous sinus, pupillomotor fibres are located superficially in the superior median quadrant of the nerve.
• They derive the blood supply from the pial blood vessels whereas the main trunk of the 3rd nerve is supplied by vasa nervorum.

I want to thank my teacher for such a beautiful explanation.
I hope it helped.
Do read about the following . (though I will write on this topic also)
1.Injury of Paramedian pontine reticular formation
2. Ptosis in Horner's syndrome and oculomotor nerve palsy.

-Upasana Y. :)



Drugs that can cause TOXIC MYOPATHIES

Hello :)

1. TYPE- Inflammatory

-Cimetidine
-D- Penicillamine
-Procainamide
-L-tryptophan
-Levodopa

2.TYPE- Non-Inflammatory necrotizing or vacuolar

-Alcohol
-Cholestrol lowering agents
-Chloroquine
-Colchicine
-Cyclosporine and tacrolimus
-Emetine
-Isoretinoic acid
-Vincristine
-Labetalol

3.TYPE -Rhabdomyolysis and myoglobinuria
-Alcohol
-Amphetamine
-Cocaine
-Heroin
-Phencyclidine
-Meperidine

4.TYPE -myosin loss

-Non depolarizing neuromuscular blocking agent
-steroid

That's all.
-Upasana Y. :)

Monday, August 14, 2017

ABC vs CAB for CPR

Hello :)

If someone ask the medical personnel, What is ABC ?
Unfailingly, the answer will be A-airway, B-breathing ,C-Circulation.

But now this has been changed to C-A-B.(I didn't know this)
C-Compression /circulation
A-airway
B-breathing

(SOURCE :- I took the following content from https://medictests.com/abc-vs-cab-correct/ )

In 2010 the AHA made a radical change to how we approach CPR.  Up until then we all lived by the trusty "ABC" (Airway, Breathing, Circulation) method of resuscitation.  Not surprisingly, though, the AHA's ongoing research began to show that compressions are the most important part of CPR and any delay or interruption resulted in worse outcomes.  It was also discovered that during CPR, the patient's blood stays oxygenated for 4-6 minutes after their last breath.  In response to this research, and in an attempt to simplify CPR for untrained laypeople, the AHA decided to switch our initial approach from ABC to CAB.  While this change is medically sound, it has cause a lot of confusion for healthcare professionals who regularly use ABC for other scenarios.  So, ABC vs CAB, which is correct?

With indisputable evidence that compressions are the most important part of CPR, it is no wonder that AHA has been dee-mphasizing airway and breathing.  In fact, in ACLS, the AHA has gone as far as to suggest that endotracheal intubation may not be as important as we once thought.  While it remains the ultimate airway, the AHA suggests BVM or supraglottic airway ventilations because they reduce the interruption of compressions.

In accordance with this paradigm shift, the AHA has changed ABC to CAB in the event of cardiac arrest.  Unfortunately, though, some healthcare providers have incorrectly interpreted this change in cardiac arrest to be a change that applies to every other medical call.  Some are under the impression that the AHA is the governing body over prehospital and emergency care, which is simply not the case.  CAB is no doubt a revolution in cardiac arrest care but it is not meant to change the way we approach our "normal" patients.

Here is a short list of examples of when ABC vs CAB should be used

ABC

Overdose
Trauma
Altered mental status
Diabetic emergencies
Respiratory failure
Airway obstruction
Respiratory Distress
CAB

Cardiac Arrest

Conclusion:-

It does not have to be one or the other!  While ABC has been phased out by the AHA, it still is the de facto initial assessment used in every non-cardiac arrest call.  CAB, on the other hand, is now being used during cardiac arrest to remind practitioners and laypeople of the importance of compressions.  In general, it is not useful to confine yourself to one ideology "because they say so."  It is much more productive to understand each approach and use critical thinking to choose the best route for your patient. 

That's all
-Upasana Y. :)

Saucerization and Arthrodesis

Hello :)

I was fascinated with this two terms :- Saucerization in Osteomyelitis and Arthrodesis (I studied it in treatment of foot drop).

SAUCERIZATION

-Extension of surgical debridement
-Debrided wounds left open widely through excision of overhanging soft tissue and bone
-Wounds drain freely (otherwise If we close it the pus will keep on collecting)
-Abscesses do not form
-Limited to areas where it causes acceptable loss of function e.g. Tibia and femur

Arthrodesis

The term arthrodesis refers to surgical fusion of a joint.
The indications for this are pain & instability in a joint and, in some situations, following the failure of joint replacement.

FIXATION POSITIONS
The optimum positions for arthrodesis in different joints are as follows:

1. SHOULDER:
-In such a position that the hand can comfortably reach the mouth.
-The person will be able to perform the day-to-day activity like eating.combing,scratching the back,cleaning.
-Arthrodesis of shoulder joint is usually reserved for a flail joint as may follow a brachial plexus injury.
-Stabilization of this joint may lead to improvement in the remaining distal function of the arm.

2. ELBOW: 90° of flexion.
(Suppose you won't be able to flex it 90 degree ,then what will happen? Try eating food with that position. You won't be able to do that without this.)

3. WRIST: A few degree of extension
4. THUMB:
-MCP joint in 20° of flexion.
-IP joint in slight flexion.
5.FINGERS:
MCP joints in 20° -30° of flexion.
 (These joints are rarely fused).
 Proximal IP joints in 40° -45° of flexion (less in middle & index fingers)
To show the importance of fixation 

-Upasana Y. :)






Casts (Colle's Cast)

Hello :)

These days, I am attending orthopaedics posting. And I am loving it.
I saw casting. Following questions were asked to me during the procedure.

Q. Define Casts and Slabs.
A. Cast & slab are methods of a temporary immobilization for a wide variety of musculoskeletal conditions not only for disorders of bones but also for many other disorders related with tendons, muscles and soft tissues

Cast: are circumferential immobilizers which is surrounding the whole circumference of the limb
Slab: are non-circumferential immobilizers which is only support apart of the circumference of the limb.

Q. Define Traction and Splints.
A. TRACTION -Traction is a method of restoring alignment to a fracture through gradual neutralisation of muscular forces. Traction is applied to the limb distal to the fracture, so as to exert a continuous pull in the long axis of the bone.

SPLINT - A device used for support or immobilization of a limb or the spine. Any material used to support a fracture is known as splint.


Q. What is Colle's Fracture?
A. It is not just fracture lower end of radius but a fracture dislocation of the inferior radioulnar joint.

Q. Do you know anything regarding Colles Cast.
A. It is a type of Immobilization method. It is the Below elbow cast (10 – 20 degree palmar flexion, 15 – 20 degree ulnar deviation) .

So, Colle`s cast :- It is a below elbow cast in supination.

 Ideally it has to meet the following 4 criteria :
-Firm fit at the dorsum
-Firm fit at the volar fracture apex
-Just snuggly fitting at the forearm
-Metacarpophalangeal joints should be free to move.

That's all for today.
-Upasana Y. :)


Arsenic Poisoning

Hello awesomites!
Here's a Mnemonic on Arsenic Poisoning
The mnemonic is AR4SENIC

A-Aldrich Mees line (Nail)
R-Raindrop pigmentation
Reinsch Test (Gutzeit test used nowadays)
Rashes(fading measles rashes)
Red velvety mucosa(Postmortem finding)
S-Subendocardial hemorrhage(Postmortem finding)
E-Excess pigmentation and keratosis (Palms and soles)
N-Neuritis
I-Iron oxide n BAL(antidote)
C-Cholera like symptoms

I hope that it's helpful.
That's all!
Thank you.

Diagnostic criteria of neurofibromatosis type 1 mnemonic


The criteria are met in an individual if two or more of the features listed are present.

The mnemonic is "FANCOOL"

F: Family history
A: Axillary freckles (known as CROWE'S SIGN)
N: Neurofibromas (2 or more)
C: Café-au-lait macules (6 or more)
O: Optic gliomas
O: Osseous  (sphenoid dysplasia)
L: Lisch nodules in the eyes.

Thanks for reading.

Madhuri

 

Sunday, August 13, 2017

Diagnostic features in the X-ray and probable pathology in the Sinus

Hello :)

1. Haziness of sinuses only :- Sinusitis
2. Bony expansion without erosion :- Benign tumefaction e.g Polyposis
3. Decreased air shadow in nasal cavity without bony expansion :- Hypertrophic rhinitis
4. Bony erosion with expansion :- Malignancy
5. Bony defect without expansion of haziness :- Surgically induced (Iatrogenic) or fracture
6. Fluid level in maxillary sinus :- Sinusitis with pus signifying acute bacterial maxillary sinusitis

This question was asked to me by my friend and it was fun to find the answer.
(Source :-Otolaryngology at the eleventh hour By Anupam Mishra)

That's all for today.
-Upasana Y. :)

Saturday, August 12, 2017

New treatment regimen for Hepatitis C


Hey guys! I have copied this article from the FDA website more or less. You will definitely find it helpful.

The U.S. Food and Drug Administration today approved Mavyret (glecaprevir and pibrentasvir) to treat adults with chronic hepatitis C virus (HCV) genotypes 1-6 without cirrhosis (liver disease) or with mild cirrhosis, including patients with moderate to severe kidney disease and those who are on dialysis. Mavyret is also approved for adult patients with HCV genotype 1 infection who have been previously treated with a regimen either containing an NS5A inhibitor or an NS3/4A protease inhibitor but not both. 

Mavyret is the first treatment of eight weeks duration approved for all HCV genotypes 1-6 in adult patients without cirrhosis who have not been previously treated. Standard treatment length was previously 12 weeks or more.

“This approval provides a shorter treatment duration for many patients, and also a treatment option for certain patients with genotype 1 infection, the most common HCV genotype in the United States, who were not successfully treated with other direct-acting antiviral treatments in the past,” said Edward Cox, M.D., director of the Office of Antimicrobial Products in the FDA’s Center for Drug Evaluation and Research.

There are at least six distinct HCV genotypes, or strains, which are genetically distinct groups of the virus. Knowing the strain of the virus can help inform treatment recommendations.

The safety and efficacy of Mavyret were evaluated during clinical trials enrolling approximately 2,300 adults with genotype 1, 2, 3, 4, 5 or 6 HCV infection without cirrhosis or with mild cirrhosis. Results of the trials demonstrated that 92-100 percent of patients who received Mavyret for eight, 12 or 16 weeks duration had no virus detected in the blood 12 weeks after finishing treatment, suggesting that patients’ infection had been cured. 

Treatment duration with Mavyret differs depending on treatment history, viral genotype, and cirrhosis status.

The most common adverse reactions in patients taking Mavyret were headache, fatigue and nausea.

Mavyret is not recommended in patients with moderate cirrhosis and contraindicated in patients with severe cirrhosis. It is also contraindicated in patients taking the drugs atazanavir and rifampin.

That's all!

-VM

Thursday, August 10, 2017

Factors increasing iron absorption in the intestine mnemonic

Hello! Long time, no see!

Did you know a number of dietary factors influence iron absorption?

Ascorbate (vitamin C) and citrate increase iron uptake in part by acting as weak chelators to help solubilize it in the duodenum.

Cushing Ulcers : An overview

Hi Everyone ! Here's a short post on Cushing and Curling ulcers.

For Cushing Ulcers you need to remember these key points :

C
U - Ulcerating - can even perforate.
S - Stomach
H - Head injury induced Stress Ulcer
I   - lNcreased
NINcreased
GGastric Acid secretion.

Stress ulcers are typically non ulcerative superficial erosions  of the gastric mucosa.
They occur when a person is subjected to physical stress in the form of Trauma, Sepsis, Burns, Hemorrhage among many others.
Psychological stress doesn't cause 'Stress ulcers' , although it does pre dispose to getting Peptic Ulcer Disease on its own accord. All the same, it doesn't cause 'Stress ulcer'.

Cushing ulcers are type of stress ulcers occuring secondary to Head injury. They occur in the stomach  commonly , and  are associated with increased Gastric acid secretion. They are typically erosive and ulcerative , more likely to perforate than other stress ulcers.

Another named stress ulcer is Curling Ulcer occuring secondary to Burns. They occur in the 1st part of duodenum  commonly , and  are NOT associated with increased Gastric acid secretion.

Presentation :
Painless upper GI bleeding within 1-2 days of traumatic event.
Usually slow and intermittent bleeding.

Diagnosis :
Endoscopy.
(More to rule out other causes of GI bleed rather than ruling this in).

Treatment :

- Treat underlying causes.
- Fluids
-  Gastric pH to be maintained > 5  (using PPI like Pantoprazole)
- If lot of bleeding - Ligation of vessel at base of ulcer.

That's all!
Happy studying !
Stay awesome !

~ A.P.Burkholderia

Image Based MCQ on Ophthalmology

Hello Awesomites!
Yesterday we posted an Image based MCQ on Ophthalmology and here is the answer for it.
#Ophthalmology
#Spot_Dx
Q. What is the most likely diagnosis of the given image? 

A. Ankyloblepharon
B. Symblepharon
C. Pterygium
D. Pseudo pterygium 

The correct answer is B. Symblepharon.
Symblepharon is an adhesion between the eyelid and the eyeball. It can involve just one lid or both. This adhesion of subepithelial scarring can lead to other lid complications such as aberrant lash growth and entropion. Symblepharon can develop as a complication of several diseases and/or etiologies that include:
Severe dry eye syndrome
Stevens-Johnson syndrome
Cicatricial pemphigoid
Chemical injury
Erythema multiforme
Bullous pemphigus
Conjunctival infections associated with conjunctival scarring such as chlamydial, vernal, atopic, and bacterial conjunctivitis
Epidemic keratoconjunctivitis
Burns
Toxic epidermal necrosis


That's all!
Thank you.

MD Mobarak Hussain (Maahii) 

Tuesday, August 8, 2017

Pulmonary Alveolar Proteinosis: High yield points


Pulmonary Alveolar Proteinosis (PAP)

a. Lipoproteinaceous material(like surfactant) accumulates within alveoli.
b. There is susceptibility to pulmonary infections, sometimes with opportunistic organisms.
c. In the congenital form, there is mutation in the gene for surfactant protein B or C or the Bc chain of the receptor for GM-CSF.
d. It can be secondary to Hematologic cancers, pharmacologic immunosuppression, inhalation of organic dust (eg., silica) or toxic fumes and certain infections.
e. Acquired PAP is an autoimmune disease targeting GM-CSF.
f. 72 percent patients have a history of smoking.
g. Most patients present with progressive exertional dyspnea of insidious onset and cough. If there is secondary infection, there can also be fever, chest pain, hemoptysis.
h. Physical examination: Some patients have cyanosis, clubbing, inspiratory crackles.
i. Chest X ray: Bilateral air-space disease with an ill-defined nodular or confluent pattern.
j. HRCT: Patchy, ground glass opacifications with superimposed interlobular septal and intralobular thickening, a pattern called "Crazy Paving".
k. The lavage fluid in patients with this disorder has an opaque, milky appearance. It is PAS positive.
l. Electron Microscopy shows that the intraalveolar material consists of amorphous, granular debris containing numerous osmiophilic, fused membrane structures resembling lamellar bodies and tubular myelin. 
m. Acquired PAP has been treated successfully by Whole-lung lavage. 

-VM

Myopathies series - Part 7

Hello :)

In previous post, We discussed about myopathy caused due to structural changes.
Today, I will explain it in detail. (SOURCE :- Harrison's Principle of internal medicine )

Two complex are important here :-
1. DYSTROPHIN COMPLEX
2. SARCOGLYCAN COMPLEX

- Dystrophin-glycoprotein complex confer stability to the sarcolemma
- deficiency of dystrophin (Duchennes dystrophy) may lead to secondary loss of the sarcoglycans and dystroglycan
-Loss of a single sarcoglycan (LGMD) results in secondary loss of other sarcoglycans in the membrane without affecting dystrophin
-Disruption of the dystrophin-glycoprotein complexes weakens the sarcolemma, causing membrane tears and a cascade of events leading to muscle fiber necrosis.

Let us discuss dystrophinopathies first .

1.Duchene’s muscular dystrophy 
-Most common muscular dystrophy
- X-linked recessive disorder
- Onset before age 5

-Age : Present at birth ,Usually becomes apparent between ages 3 and 5
-Sex : Male

Etiology
-XR (Deletion mutation of the gene that encodes dystrophin)


Laboratory Tests
• Serum CK
 – Elevated to between 20 and 100 times normal
 – Abnormal at birth but declines late in the disease because of inactivity and loss of muscle mass.

 Mutation analysis on peripheral blood leukocytes
• Identification of a specific mutation in dystrophin gene
– Allows for unequivocal diagnosis
– Makes possible accurate testing of potential carriers
 – Is useful for prenatal diagnosis

Diagnostic Procedures
• EMG -> Myopathic

Muscle biopsy
• Muscle fibers of varying size
• Small groups of necrotic and regenerating fibers
• Connective tissue and fat replace lost muscle fibers.
Definitive diagnosis is established on the basis of dystrophin deficiency.
• Diagnosis can also be made by Western blot analysis of muscle biopsy specimens.
– Abnormalities on the quantity and molecular weight of dystrophin protein

• Immunocytochemical staining of muscle with dystrophin antibodies
– Can be used to demonstrate absence or deficiency of dystrophin
 – localizing to the sarcolemmal membrane
– Possible mosaic pattern in carriers of the disease
 – Dystrophin analysis of muscle biopsy specimens for carrier detection not reliable

Treatments
Prednisone 0.75 mg/kg per d
– Significantly slows progression for up to 3 years
– Some patients cannot tolerate glucocorticoid therapy
• Weight gain is significant
– Complications of long-term use often outweigh the benefits.

Exon skipping therapy
• Duchenne's disease may benefit from novel therapies that either replace the defective gene or missing protein or implement downstream corrections (e.g., skipping mutated exons or reading through mutations that introduce stop codons)

2. Becker’s Muscular dystrophy
-Less-severe form of XR muscular dystrophy
-allelic defects of same gene of Duchenne ( ~10 times less frequent than Duchenne)

 -Age : – Most between ages 5 and 15
Onset in the third or fourth decade or even later can occur 
- Sex : Male

Symptoms & Signs
• Onset of symptoms occurs between ages 5 and 15.

I.Muscular manifestations – Pattern of muscle wasting closely resembles Duchenne.
– Progressive weakness of girdle muscles, especially of lower extremities
 – Weakness becomes generalized as disease progresses.
 – Hypertrophy, particularly in calves, is an early and prominent finding.
By definition, patients walk beyond age 15 (whereas patients with Duchenne dystrophy are typically in a wheelchair by the age of 12). 
– Significant facial muscle weakness is not a feature.
– Respiratory failure may develop by fourth decade.

II. Extramuscular manifestations
– Cardiac, may result in heart failure
– Mental retardation may occur, not as common as in Duchenne
• Other less common presentations
 – Asymptomatic hyper-CK-emia
Myalgias without weakness 
– Myoglobinuria

Laboratory Tests
• Serum CK – Closely resembles findings in Duchenne dystrophy
• Mutation analysis on peripheral blood leukocytes
– Deletions or duplications of the dystrophin gene in 65% of patients (same as in Duchennes dystrophy)
– 95% of patients, the DNA deletion does not alter the translational reading frame of mRNA.
 These "in-frame" mutations allow for production of some dystrophin, which accounts for the presence of altered rather than absent dystrophin on Western blot analysis 
• EMG – Myopathic
• Muscle biopsy – Results closely resemble those in Duchenne dystrophy.
 – Diagnosis requires Western blot analysis of muscle biopsy samples demonstrating a reduced amount or abnormal size of dystrophin.

Treatments 
• Use of glucocorticoids has not been adequately studied
Endurance training may be helpful

That's all for today.
-Upasana Y. :)

Composition of Bone cement

Hello :)

Today I saw a case of Infected AMP implant. Following questions were asked to me regarding bone cement.
Q. Composition of bone cement.

A. Bone cement consist of :- Powder and liquid.

POWDER
1. Polymer : Polymethylmethacrylate (PMMA)
2. Initiator : Benzoyl peroxide (BPO)
3. Radio-opacifier : Barium sulphate , Zirconia
4. Antibiotic :- Gentamicin (commonly)

LIQUID
1. Monomer : Methylmethacrylate (MMA)
2. Accelerator : N,N Dimethy Paratoluidine (DMPT)
3. Stabilizer : Hydroquinone

Q.Antibiotics used as additives for PMMA bone cement.
A. Antibiotics commonly used as additives for PMMA bone cement include:
- vancomycin, (MRSA)
-gentamicin,
-meropenem,
-in addition to tobramycin.

Also, successful non-antibiotic bactericides that have been used as bone cement additives include:-
- Quaternary ammonium compounds (benzalkonium chloride and cetylpyridinium chloride)

That's all for today.
-Upasana Y. :)

Monday, August 7, 2017

Causes of Radio Radial and Radio femoral delay

Hello :)

Before this post I didn't realise the importance of checking and comparing both the radial pulses.

Pulse, by definition, is the expansion and elongation of the arterial wall imparted by the column of blood, passively produced by the pressure changes during ventricular systole and diastole.
Always report the pulse under following headings.

Assessment of pulse include :-

1. RATE (beats/min)
-Tachycardia (>100bpm)
-bradycardia (<60bpm)

2.RHYTHM
-regular
-regularly irregular (2nd degree heart block)
-Irregularly irregular (Atrial fibrillation, ventricular premature beat)

3.EQUALITY

4.CHARACTER

5.PERIPHERAL PULSES

6.APEX PULSE DEFICIT (atrial fibrillation )

7. RADIO RADIAL /RADIO FEMORAL DELAY

Today , I will discuss the causes of Radio Radial and Radio Femoral delay.

CAUSES OF RADIO RADIAL DELAY :-

1. Normal anatomical variations
2. Thoracic inlet syndrome, e.g. cervical rib
3. Aneurysm of Arch of aorta
4. Presubclavian coarctation
5. Supravalvular aortic stenosis
6. Pulseless disease
7. Peripheral embolism or artheromatous plaques
8. Artherosclerosis of aorta
9. Pressure over axillary artery by lymph nodes
10. Iatrogenic, Blalock-Tausig shunt operation in TOF

CAUSES OF RADIO FEMORAL DELAY :-

1. Coarctation of aorta
2. Artherosclerosis of aorta
3. Thrombosis or embolism of aorta
4. Aortoarteritis

That's all for today,
-Upasana Y. :)

Iodized salt test

Hello :)

We all know that salt is used as a medium for iodization.
Iodized salt is used prophylactically to prevent endemic goiter as public health importance.
Iodide deficiency disorder IDD include :-
-goiter
-Hypothyroidism
- Subnormal intelligence
-Mental retardation
-Neuromuscular weakness
-Hearing and speech defect
-endemic cretinism
-Still birth

To check whether given packet of salt contain iodine or not, we use different method.
Rapid kit test is one of the test.
The kit consist of 2 ampoule  test solution and 1 recheck solution bottle.
In the diagram I made 3 bottles to represent the 3 component of the test.
Alkalinity of salt doesn't give colour. So we use recheck solution in the end of the test .
The colour of the test sample is compared with the standard colour chart for calculating the salt iodine content.




I want to thank my teacher for an explanation :)
-Upasana Y. :)

Microbiology question


#Microbiology
#Medicowesome
A patient is suffering from features of septic shock with following clinical picture.Most probable causative organism is
A) Staphylococcus
B) Listeria
C) CMV
D) Meningococcus

Answer is "D" that is Meningococcus.
It is a classical case of Waterhouse-friderichsen syndrome/Purpura fulminans/Fulminant meningococcemia:It is simply trauma to adrenal gland causing extensive bleeding, multiple organ failure, leucopenia, thromobocytopenia and consistent development of DIC.Low level of blood glucose and sodium and high level of ACTH and potassium level is suggestive of adrenal failure.
It differs from other septic shock because of the presence of prominent hemorrhagic skin lesions petechia, purpura.

Sunday, August 6, 2017

Image Based MCQ on Twin Pregnancy

Hello awesomites! 
Yesterday we posted an Image based MCQ on Twin Pregnancy. Here's the answer for it. 
#Radiology
#Obs_Gynae
Q. What is the diagnosis of the given USG image? 

A. Polyhydramnios 
B. Diamniotic Monochorionic twins 
C. Diamniotic dichorionic twins
D. Monoamniotic Monochorionic twins. 
The correct answer is C. Diamniotic dichorionic twins. 
The twin peak sign (also known as the lambda (λ) sign) is a triangular appearance of the chorion insinuating between the layers of the inter twin membrane  and strongly suggests a dichorionic pregnancy.  It is best seen in the first trimester (between 10-14 weeks). While the presence of a twin peak sign is a useful indicator of dichorionicity its absence, however, is not that useful in confidently excluding it.
It should be noted that the 'twin' in 'twin-peak' refers not to the presence of two peaks, but that it relates to twins. In pregnancies with more than two fetuses, the chorionicity and amnionicity of the each fetus may be different, and therefore this sign only aids in determining chorionicity of adjacent twins.
That's all! 
Thank you 
MD Mobarak Hussain (Maahii)