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Interesting Inventions In Medicine You Never Have Believed | No 10 Is For Diabetics
~6.0 mins read

Want to know what treatments and technologies are going to substantially change patient care next year? To find out, a panel of nearly 100 clinicians and researchers at the Cleveland Clinic, Cleveland, OH, reviewed more than 150 novel medical innovations in order to rank the top ones for 2020.

The nominated technologies had to meet certain criteria. They must have significant clinical impact and offer significant patient benefit compared with current methods. They must be in clinical trials and be available on the market sometime in the coming year. And they must have significant human interest and human impact in their application or benefits.

After due consideration and debate, the panel decided on the top 10 up-and-coming technologies in medicine.

“Healthcare is ever changing and we anticipate that these innovations will significantly transform the medical field and improve care for patients at Cleveland Clinic and throughout the world,” said Michael Roizen, MD, Emeritus Chief Wellness Officer at Cleveland Clinic, who led the panel.

Without further ado, here are their top 10 medical innovations for 2020, in order of anticipated importance:

1. Dual-acting osteoporosis drug
Approved by the FDA in April, romosozumab is the first drug for osteoporosis that has a dual effect to both increase bone formation and decrease bone resorption. In a clinical trial published in the New England Journal of Medicine, women with postmenopausal osteoporosis who received romosozumab had a 50% reduced risk of spine fracture and a 38% reduced risk of hip fracture compared with those who took standard anti-resorption therapy (alendronate).

“Patients are getting back to daily activities without risk. The treatment is providing strength not only in bones, but in spirit,” according to comments by the Cleveland Clinic.

2. Expanded use of minimally invasive mitral valve surgery
Minimally invasive surgery for mitral valve repair was introduced in 2013. The procedure involves an innovative transcatheter device that was FDA approved to repair the mitral valve in individuals with primary mitral regurgitation (MR) who aren’t eligible for open heart surgery.

But, in March, the FDA broadened the device’s approval to also include patients with MR as a result of an enlarged left ventricle, known as secondary MR. These are patients in whom optimal medical therapy failed to relieve their symptoms.

Noted the Cleveland Clinic: “This expanded use of the minimally invasive method is bringing relief to more patients by removing some of the risk, fear, and inconvenience associated with cardiac surgery.”

3. First-ever treatment for transthyretin amyloid cardiomyopathy
Transthyretin amyloid cardiomyopathy is a progressive and potentially fatal disease in which amyloid fibrils, composed of misfolded transthyretin protein, deposit in the walls of the heart’s left ventricle. These deposits stiffen the muscle, which eventually leads to heart failure.

But a newly developed compound, tafamidis, binds to transthyretin to prevent misfolding of the deposited protein. In a high-profile clinical trial, patients on tafamidis had 30% lower all-cause mortality as well as a lower rate of cardiovascular-related hospitalizations compared with similar patients on placebo.

“Following Fast-Track and Breakthrough designations in 2017 and 2018, 2019 marked the FDA approval of tafamidis, the first-ever medication for treatment of this increasingly recognized condition,” the Cleveland Clinic stated.

4. Immunotherapy for peanut allergies
Peanut allergy can be a nightmare for children—and their parents. In September, an FDA expert panel recommended the approval of a first-of-its-kind oral immunotherapy treatment for peanut allergy in children—a capsule with a minuscule amount of pharmaceutical-grade peanut protein. The immunotherapy’s dose is increased over time while the child builds up a tolerance to peanuts. In a double-blind phase 3 clinical trial, more than 3 in 4 children (76.6%) reached a daily maintenance dose of 300 mg—the equivalent of one peanut.

“Though not a cure,” the Cleveland Clinic noted, “the breakthrough treatment lessens the worry of accidental exposure, easing the minds of parents who live in constant fear.”

5. Closed-loop spinal cord stimulation
Conventional spinal cord stimulation works by sending electric impulses along the spinal column through an implanted spinal cord stimulator, reducing the pain signals that reach the brain. However, each patient is prescribed a fixed dose of stimulation, which doesn’t take the individual's movement into account, limiting its effectiveness.

Now, researchers have developed closed-loop spinal cord stimulation, which gets feedback from the patient’s own spinal cord. The closed-loop system uses a stimulator that’s able to communicate in real time with spinal cord neurons and modulate the dose of stimulation accordingly. It’s the first such system to measure the spinal cord’s response to stimulation and adjust each pulse according to the patient’s activity.

“With this technology, patients are getting measurable pain relief, sleeping better, and taking less medication,” according to the Cleveland Clinic. “Pending approval, closed-loop stimulation could be a saving grace for chronic pain patients everywhere.”

6. Biologics in orthopedic repair
People who’ve torn their anterior cruciate ligament (ACL) have a 20% chance of re-tearing it again. Now, researchers hope for better long-term results using the patient’s own biologics—cells, blood components, growth factors, and other natural substances—to promote better healing and decrease inflammation in orthopedic injuries.

In conventional ACL repair, the torn ligament is replaced with autologous tissue. The new technique—known as bridge-enhanced ACL repair (BEAR)—uses a sponge injected with biologic factors in combination with the patient’s own blood. This acts as a scaffold to stimulate healing of the ACL, preserving the tissue instead of cutting it. A multicenter, randomized clinical trial using this procedure is now underway.

Other potential uses of biologics for orthopedic repair include its use in rotator cuff injuries and as an anti-infective coating for implant devices.

“Biologics hold the potential to provide every orthopedic patient a more natural, more effective, speedy recovery,” the Cleveland Clinic predicted.

7. Antibiotic envelope for preventing infection with cardiac implants
Cardiac implant devices such as pacemakers and defibrillators come with a risk of infection. But encasing these devices in an antibiotic “envelope”—a mesh sleeve embedded with antibiotics—ensures the slow delivery of 2 antibiotics, rifampin and minocycline, for 7 days after implantation. The week-long release of antibiotics minimizes the risk of infection.

“The absorbable envelope received FDA clearance in 2013, but healthcare professionals were awaiting results from the landmark worldwide randomized WRAP-IT [Worldwide Randomized Antibiotic EnveloPe Infection PrevenTion] trial,” according to the Cleveland Clinic. “The findings published in March show a 40% reduction in major infections making cardiac implantable device procedures safer for patients.”

8. Bempedoic acid for patients who can’t take statins
Statins cause muscle pain in approximately 5% to 10% of patients who take them. A new agent, bempedoic acid, provides an alternative approach to lowering LDL cholesterol while avoiding these side effects.

Like statins, bempedoic acid works by blocking a key enzyme used by the body to make cholesterol. But unlike statins, it cannot accumulate in muscle, reducing the likelihood of muscle pain.

“In clinical trials of the therapy, patients saw their LDL levels drop by an average of about [21%]. If approved by the FDA, bempedoic acid could be another addition to the arsenal of cholesterol-lowering treatments available to patients,” the Cleveland Clinic stated.

9. PARP inhibitors for ovarian cancer maintenance therapy
One of the most important advances in ovarian cancer treatment recently, poly-ADP ribose polymerase (PARP) inhibitors have improved progression-free survival in patients, and are now being approved by the FDA for first-line maintenance therapy in advanced stage disease.

Until now, maintenance therapy hasn't been widely explored in ovarian cancer. But in a landmark study published late last year, investigators showed a 70% reduction in the risk of disease progression or death at 3 years in participants using a PARP inhibitor approved for maintenance therapy.

The Cleveland Clinic predicted: “Several additional large-scale trials are underway, with PARP inhibitors set to make great strides in improving outcomes in cancer therapy.”

10. Diabetes drugs for heart failure with preserved ejection fraction
No treatment is yet available for heart failure with preserved ejection fraction (HFpEF). However, sodium glucose co-transporter 2 (SGLT2) inhibitors—currently used to lower blood glucose for the treatment of type 2 diabetes—are now being investigated for HFpEF.

Using SGLT2 inhibitors for this purpose became of interest when researchers reported that these drugs reduced the risk of cardiovascular death and heart failure hospitalization in a cohort of patients with type 2 diabetes. Individuals with heart failure and reduced ejection fraction without diabetes on SGLT2 inhibitors showed similar results. For patients with HFpEF, research is ongoing but promising.

“With an FDA decision anticipated in 2020, these drugs, among others, are introducing potential new treatment options for patients with this heart failure subtype,” the Cleveland Clinic noted.

Original Post by John Murphy, MDLinx
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Abel
Mnemonics For Common Topics In Physiology
~9.7 mins read

For many students, physiology is one of the toughest courses. For lecturers, It is one of the toughest courses to explain to students. And this mnemonic would simplify it all for you.


Urination: autonomic control

"When you pee, it's PISs":
Parasympathetic Inhibits Sympathetic.
 
Adrenal cortex layers and products
"Great Attire And Fast Cars Are Really Sexy Attributes":
Granulosa secretes Aldosterone in response to Angiotensin II. Fasiculata secretes Cortisol in response to ACTH. Reticularis secretes Sex steroids in response to ACTH.
 
Adrenal gland: functions ACTH:
Adrenergic functions
Catabolism of proteins/ Carbohydrate metabolism
T cell immunomodulation
Hyper/ Hypotension (blood pressure control)
 
Adrenal cortex layers and products
"Go Find Rex, Make Good Sex":
· Layers: Glomerulosa Fasiculata Reticulata
· Respective products: Mineralcorticoids Glucocorticoids Sex hormones
· Alternatively for layers: GFR (Glomerular Filtration Rate, convenient since adrenal glands are atop kidney).
 
Carotid sinus vs. carotid body function
carotid SinuS: measures preSSure.
carotid bO2dy measures O2.
 
Einthoven's Triangle: organization
Corners are at RA (right arm), LA (left arm), LL (left leg).
Number of L's at a corner tell how many + signs are at that corner [eg LL is ++]. Sum of number of L's of any 2 corners tells the name of the lead [eg LL-LA is lead III]. For reference axes, the negative angle hemisphere is on the half of the triangle drawing that has all the negative signs; positive angle hemisphere contains only positive signs.
· See diagram.

 
 
Pituitary: anterior hypophysis hormones
FLATPiG:
FSH
LH
ACTH
TSH
Prolactin ignore GH
 
Hb-oxygen dissociation curve shifts: effect, location
Left shift: causes Loading of O2 in Lungs.
Right shift: causes Release of O2 from Hb.
 
 
Diabetes Insipidous: diagnosing subtypes
After a desmopression injection:
Concentrated urine = Cranial.
No effect = Nephrogenic.
 
Hyperthyroidism: signs and symptoms THYROIDISM:
Tremor
Heart rate up
Yawning [fatigability]
Restlessness
Oligomenorrhea & amenorrhea
Intolerance to heat
Diarrhea
Irritability
Sweating
Musle wasting & weight loss
 
Oxytocin-producing nucleus of hypothalamus
Paraventricular nucleus--> Parturition (childbirth is oxytocin's most important role).
 
PGI2 vs. TxA2 coagulation function
TxA2 Aggregates platelets.
PGI2 Inhibits aggregation.
· Note: full name of PGI2 is prostaglandin I2 or prostacyclin, full name of TxA2 is thromboxane A2.
 
Alkalosis vs. acidosis: directions of pH and HCO3 ROME: Respiratory= Opposite:
· pH is high, PCO2 is down (Alkalosis). · pH is low, PCO2 is up (Acidosis).
Metabolic= Equal: · pH is high, HCO3 is high (Alkalosis). · pH is low, HCO3 is low (Acidosis).
 
Temperature control: cerebral regions
"High Power Air Conditioner":
Heating = Posterior hipothalamo [hypothalamus].
Anterior hipothalamo [hypothalamus] = Cooling.
 
VO2 normal value is 250 mL/min
"V02" is the numbers, just need to rearrange the order. V is roman numeral for 5, so rearrange to 2V0, or 250 mL/min.
 
Nervous stimulus: the 4 ways to classify
"A MILD stimulus": Modality Intensity Location Duration
 
Compliance of lungs factors COMPLIANCE:
Collagen deposition (fibrosis)
Ossification of costal cartilages
Major obesity
Pulmonary venous congestion
Lung size
Increased expanding pressure
Age
No surfactant
Chest wall scarring
Emphysema
· All but L/A/E decrease compliance.
 
Intrinsic vs. extrinsic pathway tests
"PeT PiTTbull":
PeT: PT is for extrinsic pathway.
PiTTbull: PTT is for intrinsic pathway.
 
Heart: -tropic definitions
Lusitropic: loose is relaxed.
Definition: relax heart.
Inotropic: when heart wall contracts, moves inward.
Definition: contract heart. Chronotropic: 'chrono-' means 'time'. Defintion: heart rate (of SA node impulses).
Dromotropic: only one left, it must be conduction speed by default.
 
Pituitary hormones FLAGTOP:
Follicle stimulating hormone
Lutinizing hormone
Adrenocorticotropin hormone
Growth hormone
Thyroid stimulating hormone
Oxytocin
Prolactin
Alternatively: GOAT FLAP with the second 'A' for Anti-diruetic homone/vasopressin
· Note: there is also melanocyte secreting homone and Lipotropin, but they are not well understood.
 
Heart valves: sequence of flow
TRIPS BIAS:
TRIcuspid Pulmonary Semilunar
BIcuspid Aortic Semilunar
 
V/Q gradient in lung
Infinity, a lung and a zero stack nicely.
V/Q is lowest at bottom, highest at top.
· See diagram
 
Balance organs
Utricle and Saccule keep US balanced.
 
Adrenal cortex layers and products
"Get your Facts Right, Men are Glued to their Gonads":
Glomerulosa Fasciculata Reticularis Mineralocorticoids Glucocorticoids Gonadocorticoids [androgens]
 
Heart electrical conduction pathway
"If patient's family are all having Heart attacks, you must SAVe HIS KIN!"
SA node ---> AV node ---> His (bundle of) --> PurKINje fibers
 
Gut intrinsic innervation: myenteric plexus vs. submucosal plexus function
Myenteric: Motility.
Submucosal: Secretion and blood flow.
 
Progesterone: actions PROGESTE:
Produce cervical mucous
Relax uterine smooth muscle
Oxycotin sensitivity down
Gonadotropin [FSH, LH] secretions down
Endometrial spiral arteries and secretions up
Sustain pregnancy
Temperature up / Tit development
Excitability of myometrium down
 
Mechanoreceptor types
"Frustated Muscular Mechanics Rub Her P*ssy":
Free nerve endings
Meisner's
Merkel's disc
Ruffini's
Hair end organ
Pacinian corpuscle
 
Hemoglobin and myoglobin: binding strengths, sites
"ABC" of glycosylated Hb (Hb1c):
· Glucose binds to Amino terminal of Beta Chain.
"HbF binds Forcefully":
· HbF binds oxygen more forcefully than HbA, so Oxy-Hb dissociation curve shifts to left. Stored blood is SOS:
· Stored blood Hb binds to Oxygen Strongly because of decrease in 2,3 BPG. 2,3 BPG binding site is BBC: · BPG binds to Beta Chain of Hb.
Myoglobin binding strength is MOM: · Myoglobin binds Oxygen More strongly than Hb.
 
Muscle spindle: origin of primary vs. secondary endings
"1 from 1, 2 from 2":
Primary ending is from Group Ia.
Secondary ending from Group II.
· See diagram.  
 
Osteoblast vs. osteoclast
OsteoBlast Builds bone.
OsteoClast Consumes bone.
 
Pepsin-producing cells
"Chief of Pepsi-Cola":
· Chief cells of stomach produce Pepsin.
 
Prostaglandins: dilatation abilities
Prospectors keep mineshafts open:
Mineshaft 1: Patent ductus ateriosus.
Mineshaft 2: renal afferent arteriole dilatation.
 
Adrenal cortex layers and products
"Get My Freakin' Gun Right Away":
Glomerulosa: Mineralcorticoid (aldosterone) Fasiculata: Glucocorticoid (cortisol) Reticularis: Androgens 
 
MAO isoenzyme form locations
· MAO-A in: Adrenergic peripheral structures Alimentary mucosa [intestine]
· MAO-B in: Brain Blood platelets
 
Adrenal cortex layers and products
"Get All Fat Chicks Right Away":
· Layers: Glomerulosa Fasciculata Reticularis · Products: Aldosterone Cortisol Androgens
 
Cochlea: inner vs. outer hair cell function
"Outer cells are Out of the brain. Inner cells are Into the brain":
Outer hair cells are motor efferents to amplify signal. Inner hair cells are sensory afferents that actually pick up the sound.
 
LH vs FSH: function in male
LH: Leydig cells stimulated to produce testosterone.
FSH: Spermatogenesis stimulated.
 
Heart valves: closure sequence
"Many Things Are Possible":
Mitral, Tricuspid, Aortic, Pulmonic
 
Rods vs. cone function
RoD: Dim light.
Cones: Color.

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Guest-
Some Possible Diagnosis For CNS Symptoms
~0.9 mins read


1. Trauma Causes

Spinal cord injury

Cervical spine fracture/dislocation

Spinal cord transection/traumatic


2. Neoplastic Disorders

Cervical spinal cord tumor

Frontal lobe tumor

Thoracic spinal cord tumor

Spinal Meningioma


3. Allergic, Collagen, Auto-Immune Disorders

Multiple Sclerosis


4. Congenital, Developmental Disorders

Cerebral palsy

Arnold-Chiari syndrome

Machado-Joseph Syndrome


5. Hereditary, Familial, Genetic Disorders

Paraplegia, spastic hereditary

Pallidopyramidal hereditary syndrome


6. Anatomic, Foreign Body, Structural Disorders

Spinal cord compression

Spinal cord compression, chronic

Spinal Cord Hematoma


7. Arteriosclerotic, Vascular, Venous Disorders

Stroke syndrome

Strokes, multiple, small/syndrome

Cerebral lacunar infarct


8. Reference to Organ System

Cerebral hemisphere lesion/disorder

Cerebral motor cortex/area four lesion

Paraplegia

Paraplegia, spastic

Paraparesis

Myelitis

Myelitis, acute transverse

Cervical myelopathy

Combined system disease/pernicious an.

Transverse myelitis, subacute

Brown-Sequard syndrome


9. Pathophysiologic

Upper motor neuron disorder

Corticospinal tract lesion/pathology

 

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