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SensitivityAndSpecificity

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11
180

Sensitivity and Specificity

Easily understand the concepts of SENSITIVITY and SPECIFICITY! These two words can be confusing when you are first learning the basics of biostatistics.  
youtu.be
over 3 years ago
Volcano beautiful eruption 695x434
6
42

Subarachnoid Haemorrhage; Ruling out the Disease Is CT Ever Enough?

A review of a landmark paper from 2011 on the use of CT for patients with a suspected subarachnoid haemorrhage. Has the sensitivity of CT moved forward enough to make the lumbar puncture non-essential?  
heftemcast.co.uk
almost 6 years ago
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4
146

Antifungal Sensitivity Testing

Anti fungal Sensitivity Testing  
slideshare.net
over 4 years ago
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3
58

Atopic Dermatitis

Atopic dermatitis is a skin inflammation caused by sensitivity to something in the environment. It often runs in families and may occur along with hay fever,...  
youtube.com
over 3 years ago
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2
29

Differences in Mechanosensory Discrimination Across the Body Surface - Neuroscience - NCBI Bookshelf

The accuracy with which tactile stimuli can be sensed varies from one region of the body to another, a phenomenon that illustrates some further principles of somatic sensation. Figure 9.4 shows the results of an experiment in which variation in tactile ability across the body surface was measured by two-point discrimination. This technique measures the minimal interstimulus distance required to perceive two simultaneously applied stimuli as distinct (the indentations of the points of a pair of calipers, for example). When applied to the skin, such stimuli of the fingertips are discretely perceived if they are only 2 mm apart. In contrast, the same stimuli applied to the forearm are not perceived as distinct until they are at least 40 mm apart! This marked regional difference in tactile ability is explained by the fact that the encapsulated mechanoreceptors that respond to the stimuli are three to four times more numerous in the fingertips than in other areas of the hand, and many times more dense than in the forearm. Equally important in this regional difference are the sizes of the neuronal receptive fields. The receptive field of a somatic sensory neuron is the region of the skin within which a tactile stimulus evokes a sensory response in the cell or its axon (Boxes A and B). Analysis of the human hand shows that the receptive fields of mechanosensory neurons are 1–2 mm in diameter on the fingertips but 5–10 mm on the palms. The receptive fields on the arm are larger still. The importance of receptive field size is easy to envision. If, for instance, the receptive fields of all cutaneous receptor neurons covered the entire digital pad, it would be impossible to discriminate two spatially separate stimuli applied to the fingertip (since all the receptive fields would be returning the same spatial information). Figure 9.4Variation in the sensitivity of tactile discrimination as a function of location on the body surface, measured here by two-point discrimination. (After Weinstein, 1969.)  
ncbi.nlm.nih.gov
over 4 years ago
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1
234

Sensitivity Specificity: Easy Epidemiology Difference Spin Snout Test

Tutorial teaching sensitivity vs. specificity, including SPIN and SNOUT mnemonics. Learn the difference between sensitive and specific tests, for medical health science students. Please SUBSCRIBE: More cool stuff coming as we get more HippoHelpers! Further tutorials and flashcards at http://www.helphippo.com Our epidemiology playlist at: http://www.youtube.com/playlist?list=PLIPkjUW-piR24nWuDMiXPB0DcUl-1qUzr http://www.helphippo.com - for more video tutorials organized by topic/year.  
HelpHippo.com
almost 6 years ago
Www.bmj
1
33

Triptans for symptomatic treatment of migraine headache

A 30 year old woman has debilitating, pulsating right sided headaches up to twice a month for several years. Her pain builds up rapidly and usually lasts 24 hours. She has to lie down during episodes, which are associated with sensitivity to light, severe nausea, and occasional vomiting. Over the counter analgesics such as ibuprofen or paracetamol were initially helpful in relieving pain, but not recently. She asks if any treatments may help with her headaches and allow her to return to her usual activities sooner.  
bmj.com
almost 6 years ago
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birth-injuries

Personal injury attorneys at Downtown L.A. Law understand the care and sensitivity involved with your child. We will aggressively handle your birth injury case  
downtownlalaw.com
over 5 years ago
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1
21

Which teens are at risk for emotional symptoms after concussion?

Preliminary research suggests that teens who experience sensitivity to sound or light after a concussion are more likely to also experience emotional symptoms.  
Medical News Today
over 5 years ago
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1
32

Signs and Symptoms in Family Medicine

Signs and Symptoms in Family Medicine, by Paul M. Paulman, MD et al, provides a unique evidence-based approach to diagnosis based on presenting signs. Focusing on the most common diagnoses observed in a medical practice, the book helps you "think horses, not zebras." A rating system for the sensitivity and specificity of the signs, symptoms, and diagnostic tests aids in the development of a focused and accurate differential diagnosis. This handy, take-along guide is ideal for quick reference at the bedside or a refresher while prepping for the boards. Confidently diagnose and treat common illnesses and conditions using an evidence-based, systematic approach. A unique ratings system indicates how frequently various symptoms and signs are associated with a particular diagnosis. Easily find what you need with consistently organized chapters and an at-a-glance bulleted format. "Think horses, not zebras" with a focus on the most frequently encountered diagnoses. Rule out the most serious possibilities quickly with differential diagnoses listed in descending order of severity. Review symptoms, signs, suggested work-up, and patient disposition for each diagnosis. Patients present with symptoms, not diagnoses  
books.google.co.uk
almost 5 years ago
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Sensitivity and Specificity Explained Clearly

Understand sensitivity and specificity with this clear explanation by Dr. Roger Seheult. Includes tips on remembering the differences between true positive, ...  
youtube.com
almost 5 years ago
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1
26

Celiac disease and non-celiac gluten sensitivity

Celiac disease is a multisystem immune based disorder that is triggered by the ingestion of gluten in genetically susceptible individuals. The prevalence of celiac disease has risen in recent decades and is currently about 1% in most Western populations. The reason for this rise is unknown, although environmental factors related to the hygiene hypothesis are suspected. The pathophysiology of celiac disease involves both the innate and adaptive immune response to dietary gluten. Clinical features are diverse and include gastrointestinal symptoms, metabolic bone disease, infertility, and many other manifestations. Although a gluten-free diet is effective in most patients, this diet can be burdensome and can limit quality of life; consequently, non-dietary therapies are at various stages of development. This review also covers non-celiac gluten sensitivity. The pathophysiology of this clinical phenotype is poorly understood, but it is a cause of increasing interest in gluten-free diets in the general population.  
feeds.bmj.com
over 4 years ago
5
1
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Discussion: a price for advances in medicine. Phase I clinical trial fail in France

Let me suggest a topic for discussion that might be a bit provocative. It's about the prices that sometimes we have to pay for advances in medicine. Ist phase clinical trial of a new painkiller drug manufactured by Bial (Portugal) failed with one man brain-dead and another five ones in critical state with neurologic symptoms, three of them are suspected to have irreversable changes in their CNS. [Links to news articles below] What is your opinion: who carries responsibility for these cases? Bial, Biotrial clinic that carried out the trial or maybe somone else involved? What kind of responsibility must it be provided the fact people involved in the study are volunteers and must have been consulted about specificity and all the issues that can arise in phase I clinical trials? Could there take place unproperly done preclinical trial? What do you think about it? ||You can follow these links to get more information about the case: http://www.bbc.com/news/world-europe-35337671 http://www.medscape.com/viewarticle/857379  
Alina Ivaniuk
about 4 years ago
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1
17

Introduction to Psychology 1.0 | Flat World Education

The most fundamental emotions, known as the basic emotionsThe emotions of anger, disgust, fear, happiness, sadness, and surprise., are those of anger, disgust, fear, happiness, sadness, and surprise. The basic emotions have a long history in human evolution, and they have developed in large part to help us make rapid judgments about stimuli and to quickly guide appropriate behavior (LeDoux, 2000).LeDoux, J. E. (2000). Emotion circuits in the brain. Annual Review of Neuroscience, 23, 155–184. The basic emotions are determined in large part by one of the oldest parts of our brain, the limbic system, including the amygdala, the hypothalamus, and the thalamus. Because they are primarily evolutionarily determined, the basic emotions are experienced and displayed in much the same way across cultures (Ekman, 1992; Elfenbein & Ambady, 2002, 2003; Fridland, Ekman, & Oster, 1987),Ekman, P. (1992). Are there basic emotions? Psychological Review, 99(3), 550–553; Elfenbein, H. A., & Ambady, N. (2002). On the universality and cultural specificity of emotion recognition: A meta-analysis. Psychological Bulletin, 128, 203–23; Fridlund, A. J., Ekman, P., & Oster, H. (1987). Facial expressions of emotion. In A. Siegman & S. Feldstein (Eds.), Nonverbal behavior and communication (2nd ed., pp. 143–223). Hillsdale, NJ: Lawrence Erlbaum Associates. and people are quite accurate at judging the facial expressions of people from different cultures. View "Video Clip: The Basic Emotions" to see a demonstration of the basic emotions.  
catalog.flatworldknowledge.com
over 3 years ago
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B-Cells 1 - What are Antibodies?

http://www.handwrittentutorials.com - This video defines Antibodies (Immunoglobulins) and looks at their unique specificity for epitopes on pathogens. For more entirely FREE tutorials and accompanying PDFs visit http://www.handwrittentutorials.com  
HelpHippo.com
almost 6 years ago
2
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How effective is the stethoscope at eliciting pathology?

I have been thinking for a while, most tests in medicine have a sensitivity and specificity when related to pathology. How does this relate to examination findings and especially those done with the stethoscope in cardiological and respiratory examinations?  
Gareth Lewis
over 7 years ago
5
0
14

Which exact parts of the hand are affected in carpal tunnel syndrome?

I'm asking only about sensitivity. Most pictures of carpal tunnel syndrome show that the thumb, index, middle and the adjacent half of the ring AND the related part of the hand are affected. But this image from fpnotebook.com clearly shows and says that the palm sensitivity is mediated by the branch of the median nerve that does not go through the carpal tunnel. So, I made a new image of carpal tunnel syndrome with only fingers colored. Can anyone who is certain of this say did I make it correct or not?  
Jan Modric
over 6 years ago
7
0
93

Guyon's canal syndrome - tingling in hand?

The same question as with carpal tunnel syndrome. Are only the fingers (the pinky and adjacent half of the ring finger) affected or also the related part of the hand? Acoording to my research until now, there can be paresthesia in the pinky side of the hand but only about halfway toward the wrist. Most other pictures show altered sensitivity beyond the wrist.  
Jan Modric
over 6 years ago
Www.bmj
0
16

Testing for changes in troponin over first hour speeds up detection of acute myocardial infarction

Testing blood for high sensitivity cardiac troponin T when patients with suspected myocardial infarction (MI) arrive at hospital and monitoring any changes over the first hour can accurately detect who has had a heart attack and who has not, a multicentre European study has found, which could accelerate decisions on management.  
feeds.bmj.com
almost 5 years ago
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Cellular signals for pain fine tune neurons' sensitivity to opiods

At the cellular level, pain and pain relief are caused by two different signaling pathways.  
medicalnewstoday.com
almost 5 years ago