Connect with us

Health and Wellness

how doctors use light to diagnose diseases

Published

on


You do not feel well. You’ve had a throbbing headache, dizziness, and vomiting all week after your previous few meals.

You visit your GP to get answers and sit as he shines a light in your eyes, orders a blood test and asks for imaging tests.

Everything your GP has done relies on light. These are only a number of the optical technologies which might be having a huge effect on the best way we diagnose diseases.

1. On-site testing

Point-of-care diagnostics allow doctors to test patients on-site and get answers in minutes, slightly than sending samples to a lab for evaluation.

A “flashlight” utilized by a family doctor to look contained in the eye (so-called ophthalmoscope) is an excellent example. This allows doctors to detect abnormal blood flow in the attention, deformation of the cornea (the outermost transparent layer of the attention), or swelling of the optic discs (the circular section in the back of the attention where the nerve connection to the brain begins). Swollen discs are an indication of increased pressure inside the top (or, within the worst case scenario, a brain tumor) which may be attributable to causing your headaches.

Invention lasers and LEDs has made many other miniaturized technologies available on the bedside or within the clinic, slightly than within the laboratory.

A famous example is pulse oximetry, during which a clip attached to the finger provides information concerning the level of blood oxygenation. He does this through measuring different reactions of oxygenated and deoxygenated blood to different colours of light.

Pulse oximetry is utilized in hospitals (and sometimes at home) to monitor the health of the respiratory system and heart. In hospitals, additionally it is a precious detection tool heart defects in infants.

See that clip on the patient’s finger? It is a pulse oximeter that monitors the condition of the respiratory system and heart using light.
CGN089/Shutterstock

2. Looking at molecules

Now let’s return to this blood test. Analyzing a small amount of blood allows you to diagnose many various diseases.

A tool called an automatic “complete blood count analyzer” that checks overall health indicators. This device directs focused beams of light through blood samples stored in small glass tubes. It counts the variety of blood cells, determines their specific type and provides the extent of hemoglobin (a protein in red blood cells that distributes oxygen within the body). Within minutes this machine can deliver snapshot general health.

To obtain more specific disease markers, blood serum is separated from heavier cells by centrifugation in a rotating instrument called a centrifuge. The serum is then subjected to special chemical stains and enzyme tests that change color depending on the presence of certain molecules, which could also be an indication of disease.

These color changes can’t be detected with the naked eye. However, a beam of light from an instrument called a spectrometer can detect small amounts of those substances within the blood and determine whether and at what concentrations biomarkers of diseases are present.

A gloved hand holding a test tube containing a blood sample, with more test tubes on a rack in the background
Light passes through the blood sample and tells us whether biomarkers of the disease are present.
angellodeco/Shutterstock

3. Medical imaging

Let’s look again on the medical images ordered by your GP. The development of fiber optic technology, which became famous for transforming high-speed digital communications (comparable to NBN), allows light to enter the body. Result? High resolution optical imaging.

A typical example is endoscopeduring which fibers with a small camera on the top are inserted into natural body openings (comparable to the mouth or anus) to examine the intestines or respiratory tract.

Surgeons can use the identical technology through tiny incisions to view the within the body on a video screen during surgery laparoscopic surgery (also generally known as keyhole surgery) to diagnose and treat diseases.

Endoscopic tube
Doctors can insert this versatile fiber-optic tube with a camera on the top into the patient’s body.
Eduard Valentinov/Shutterstock

What concerning the future?

Advances in nanotechnology and a greater understanding of how light interacts with our tissues are leading to latest light-based tools that help diagnose disease. These include:

  • nanomaterials (materials on a particularly small scale, many 1000’s of times smaller than the width of a human hair). They are utilized in next-generation sensors and latest diagnostic tests

  • wearable optical biosensors nail size will be taken into consideration in devices comparable to watches, contact lenses and finger bands. These devices enable non-invasive measurement of sweat, tears and saliva in real time

  • AI tools to analyze how blood serum scatters infrared light. This enabled scientists to construct extensive database scatter patterns to detect any cancer

  • a kind of non-invasive imaging, the so-called optical coherence tomography for more detailed imaging of the attention, heart and skin

  • fiber optic technology that enables a small microscope to be introduced into the body the tip of the needle.

So the following time you see your primary care doctor who performs (or orders) certain tests, chances are high that a minimum of certainly one of those tests will depend upon light to diagnose the disease.

This article was originally published on : theconversation.com
Continue Reading
Advertisement
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Health and Wellness

Vice President Kamala Harris’ ascension and derailment to the White House is the story of many Black women, including me

Published

on

By

2024 Election, Concerned, black women


Written by Dr. Dionne Mahaffey

My heart is heavy. My mind is racing and I am unable to help but take into consideration what this latest era under Donald Trump means for me and for ladies who appear like me and who wanted Vice President Kamala Harris to win, not simply because of her policies and competence or its historical significance. We wanted her to win because having her as a black woman in charge could be a robust statement for a rustic that so often seems reluctant to recognize our strength, talent and humanity.

Madame Harris’s candidacy was deeply personal. Black women identified together with her story, her rise, her spirit. Like me, she grew up in a single mother’s home. She’s my sorority sister. I felt hopeful in the concept that for the first time a Black woman was on the verge of real power, not only next to it. She represented every part we are sometimes told we can’t be: good, uncompromisingly ambitious, compassionate, and yet fiercely independent. Her presence defied the “angry black woman” stereotype, and her resilience reminded us of the countless ways during which Black women have long been pillars of American progress.

But now plainly this dream has been placed on the back burner. Trump’s victory brings back a well-recognized fear. His administration has at all times signaled a disregard for racial equality and women’s rights. We’ve seen what happens when hard-won protections are dismantled: voting rights are violated, police grow to be more aggressive, access to health care is restricted, and social justice is sidelined. For me as a black woman, these changes aren’t abstract political moves; these are issues of survival and dignity. The rhetoric surrounding us is a direct reflection of how protected, valued and vulnerable we feel in our own country.

With Trump’s victory comes the specter of Project 2025, a conservative motion plan that would severely limit civil rights, access to health care and economic resources, especially for Black Americans. Proposed cuts and restructuring of health care, housing and education could reverse years of progress and disproportionately harm marginalized communities. In my work, I see the potential impact on Black-owned businesses that already face enormous barriers to accessing capital. My clients – small business owners who’ve put every part into their ventures – are actually apprehensive about surviving in an economy that will push them further aside. Their concerns echo my very own, underscoring a reality we all know all too well: for us, progress is never linear and actually not guaranteed.

Twice nearly as good

But she didn’t win. We know that Black women often have to be twice nearly as good to achieve half nearly as good. Instead, America selected a criminal over an experienced black woman and it hurts. His victory brought back memories of my very own profession, after I began my first job in the technology industry over 30 years ago. I earned a formidable six-figure salary and came upon that my white friend made $30,000 greater than me. I had a diploma; he didn’t do it. While I used to be promoted to manager, he was promoted to director, and the company ended up paying for his education while I self-funded my MBA. That was the first time I understood how much white men were pampered and given opportunities to achieve perfection that black women were simply expected to earn.

Kamala was greater than qualified — she had worked as a prosecutor for 13 years, was the first Black and South Asian woman elected as a district attorney in California, the first Black and South Asian woman in the United States Senate, and the first woman of color to function vice chairman. By contrast, Trump is a convicted felon, born into privilege, who paid someone to take the SATs, filed for bankruptcy six times, was found guilty of sexual assault, incited a deadly revolt and denied the results of the 2020 presidential election. But by some means he won.

For Black Americans, Trump’s return to office is greater than symbolic. The reality of Trump’s latest presidency appears to be looming. Project 2025 plans to dismantle civil rights protections, access to health care, and economic opportunity that our communities have fought to provide. For those of us who in the past were forced to work twice as hard to achieve half as much, the stakes couldn’t seem higher.

Peace priority

The consequences of these selections aren’t just political – they’re deeply personal. As a therapist, I actually have seen firsthand how alternative anxiety affects my clients. After the elections, this tension will only deepen. Many people struggle with concerns about their future safety, rights and dignity in an environment where they feel increasingly unheard and invisible. Advising clients in these times is difficult, especially knowing that they may face renewed threats to their mental health and well-being. They carry the burden of this country’s instability, and sometimes that burden is greater than anyone should bear.

While helping others, I also need to concentrate to my very own mental health. It’s hard to support others when your spirit is drained, when their fears mirror yours. Taking care of yourself is not just a buzzword for me now – it is a necessity. Every day I remind myself that I cannot pour from an empty cup; so as to serve my clients and community, I need to provide myself with a spot to rest, recharge, and find peace inside myself.

Protecting our peace in times like these requires intention and care. It starts with tuning out the noise – setting boundaries around the news to stay on top of things and prevent anxiety from creeping in. Community is a balm, a reminder that we’re on this together. Leaning on friends, family and networks keeps us grounded and resilient. Mindfulness practices, corresponding to just a few minutes of quiet reflection or deep respiratory, can show you how to regain calm in the face of stress. Taking small actions, volunteering, supporting essential causes restores a way of control and purpose.

And still we rise

When I take into consideration this moment, I do not forget that Black women have faced adversity for generations and proceed to thrive. Kamala Harris’s candidacy, irrespective of the end result, has ignited something inside us – the determination to claim our space, construct our communities, and defend justice. The fight for equality and progress doesn’t end with one election; it is a lifelong journey and we’re uniquely equipped to sail it.

So today I hold space for my disappointment. But tomorrow, like all Black women who know that our value, power, and stories are greater than any single person or alternative, I’ll return to work. We will proceed to move forward, not just for ourselves, but for generations who will look back on this moment and know that we never gave up. Together we embody resilience and together we are going to rise.


This article was originally published on : www.blackenterprise.com
Continue Reading

Health and Wellness

WATCH: In the studio: Who decides on the war – Essence

Published

on

By

“; } }); // Drag and scroll functionality const playlistContainer = document.getElementById(‘playlist’); let isDown = false; let startY; let scrollTop; playlistContainer.addEventListener(‘mousedown’, (e) => { isDown = true; playlistContainer.classList.add(‘active’); startY = e.pageY – playlistContainer.offsetTop = playlistContainer.addEventListener(‘mouseleave’; playlistContainer.classList.remove(‘active’); playlistContainer.addEventListener(‘mouseup’, () => { isDown = false; playlistContainer.classList.remove(‘active’); }); mousemove’, (e) => { if (!isDown) return; e.preventDefault(); const y = e.pageY – playlistContainer.offsetTop; const walk = (y – startY) * 3; .scrollTop = scrollTop – walk; }); } } if (” !== ‘efoc24’) { // Check DoubleVerify Quality Targeting signals before rendering the player if ( ‘unknown’ !== typeof PQ ) { PQ.cmd. push(function() { // If DVQT signals are not available after 500 ms, render the player anyway. const timeout_id = setTimeout( jwPlayerRender, 500 ); // Get “Authentic Direct” signals. PQ.getTargeting({ signals: [‘abs’] }, function(error, targetingData) { clearTimeout(timeout_id); jwPlayerRender(error? undefined: targetingData); }); }); } else { jwPlayerRender(); } function jwPlayerRender( dvqt_signals=”” ) { let jw_ad_tag ​​= {“client”:”googima”,”adscheduleid”:”G7hR9pQ2″,”schedule”:[{“tag”:”https://pubads.g.doubleclick.net/gampad/ads?correlator=&iu=/21698916284/ess/VideoNews&env=vp&gdfp_req=1&output=vast&sz=400×300%7C640x480%7C1000x1%7C1920x1080&description_url=__page-url__&tfcd=0&npa=0&vpmute=1&vpa=auto&vad_type=linear&url=__page-url__&vpos=preroll&unviewed_position_start=1&v=BHeaONV5&pmnd=0&pmxd=60000&ad_rule=1&cust_params=ttid%3DBHeaONV5%26frnch%3D__item-franchise__%26environment%3Dproduction%26kwblock%3Ddis%2CAbb%2CAir%2CDIS+2%2CCapOne%2CCapOne2%2CLincoln%2CUPS%2CVG%2CATTCric%2Cmcd%2CTargetbos%2CEFOC_Tar.%2CToyota%2CNationwide%2CDisney%2CKISQALI+420491%2CPubW+Precision%2Cattefoc3%2CWalmart%2CHyundai2023%2CHuluPMP%2CCokeBWIH%2CAxSpA”,”offset”:”pre”},{“tag”:”https://vid.springserve.com/vast/670880?url=https://www.essence.com/news/watch-in-the-studio-who-decides-war/h=450&w=800&cb=2735″,”offset”:”50%”}]”offers”:{“bidders”:[{“id”:”jw-video-BHeaONV5″,”name”:”jwdemand”,”publisherId”:”evcxFIDZ”,”siteId”:”WT5iFegj”,”placementId”:”24399785″}]”settings”:{“disableConsentManagementOnNoCmp”:true,”mediationLayerAdServer”:”dfp”,”floorPriceCents”:200,”floorPriceCurrency”:”usd”,”buckets”:[{“increment”:0.1,”max”:30,”min”:0},{“increment”:0.5,”max”:50,”min”:30}]}}}; // Configure ad tag on the fly… let additional_params = {}; // Input DVQT signals. if ( dvqt_signals && dvqt_signals.ABS.length > 0 ) { additional_params.ABS = dvqt_signals.ABS.join(“,”); } // Create a string of additional_parameters. let extra_params_str=””; for (enter additional_parameters) { let value = additional_parameters[key]; additional_params_str += `${key}=${value}`; if ( key !== Object.keys( additional_params .pop() ) { additional_params_str += ‘&’; } } // Update ad tag cust_params (must be URL encoded). if ( Object.keys( additional_parameters ). length > 0 ) { let ad_schedule = jw_ad_tag.schedule; if ( ‘undefined’ !== ad schedule type ) { for (let i = 0; i < ad_schedule. length; i++) { let ad_url = new URL(jw_ad_tag. schedule[i].label); let query_params = new URLSearchParams(ad_url.search); query_params.set("cust_params", query_params.get("cust_params") + `&${additional_params_str}`); ad_url.search = query_params.toString(); jw_ad_tag.schedule[i].tag = ad_url.toString(); } } } let playerId; if ("undefined" !== type jwplayerQueue) { playerId = 'jw-video-BHeaONV5'; jwplayerQueue.push({ 'instanceId': 'playerInstance_BHeaONV5', 'playerId': playerId, 'config': { pid: 't6KP9zcV', playlist: "https://cdn.jwplayer.com/v2/media/BHeaONV5", autostart: !jw_ad_tag, repeat: true, mute: true, aspect ratio: "16:9", share: {sites: ["facebook", "twitter", "email", "linkedin"]}, cast: {}, float: {disibility: true}, autoPause: {viewability: true}, displaytitle: true, displaydescription: true, controls: true, related: {displayMode: 'shelfWidget'}, interactive: {} , ad: jw_ad_tag ​​​​} }); } // Load video. jQuery(window).trigger("jw:loadplayers"); function waitForJWPlayer(callback) { if (type jwplayer !== 'undefined') { callback(); } else { setTimeout(function() { waitForJWPlayer(callback); }, 500); } } waitForJWPlayer(function() { jwplayer(playerId).on('adsManager', function (adsManagerLoaded) { let adsManager = adsManagerLoaded.adsManager; let videoElement = document.getElementById(playerId ); let config = { anId: '929481' , campId: '640x360', ias_xps: "autoplay", // autoplay status ias_xbp: "2", // video destination type ias_xar: "1" // autoplay status }; // Start IAS integration googleImaVansAdapter .init(google, adsmanager, videoitem, config } } });

This article was originally published on : www.essence.com
Continue Reading

Health and Wellness

SEE: On my feed – Black women react with shock, resignation and anger to Donald Trump’s presidential victory – Essence

Published

on

By

“; } }); // Drag and scroll functionality const playlistContainer = document.getElementById(‘playlist’); let isDown = false; let startY; let scrollTop; playlistContainer.addEventListener(‘mousedown’, (e) => { isDown = true; playlistContainer.classList.add(‘active’); startY = e.pageY – playlistContainer.offsetTop = playlistContainer.addEventListener(‘mouseleave’; playlistContainer.classList.remove(‘active’); playlistContainer.addEventListener(‘mouseup’, () => { isDown = false; playlistContainer.classList.remove(‘active’); }); mousemove’, (e) => { if (!isDown) return; e.preventDefault(); const y = e.pageY – playlistContainer.offsetTop; const walk = (y – startY) * 3; .scrollTop = scrollTop – walk; }); } } if (” !== ‘efoc24’) { // Check DoubleVerify Quality Targeting signals before rendering the player if ( ‘unknown’ !== typeof PQ ) { PQ.cmd. push(function() { // If DVQT signals are not available after 500 ms, render the player anyway. const timeout_id = setTimeout( jwPlayerRender, 500 ); // Get “Authentic Direct” signals. PQ.getTargeting({ signals: [‘abs’] }, function(error, targetingData) { clearTimeout(timeout_id); jwPlayerRender(error? undefined: targetingData); }); }); } else { jwPlayerRender(); } function jwPlayerRender( dvqt_signals=”” ) { let jw_ad_tag ​​= {“client”:”googima”,”adscheduleid”:”G7hR9pQ2″,”schedule”:[{“tag”:”https://pubads.g.doubleclick.net/gampad/ads?correlator=&iu=/21698916284/ess/VideoNews&env=vp&gdfp_req=1&output=vast&sz=400×300%7C640x480%7C1000x1%7C1920x1080&description_url=__page-url__&tfcd=0&npa=0&vpmute=1&vpa=auto&vad_type=linear&url=__page-url__&vpos=preroll&unviewed_position_start=1&v=XwtX3gTf&pmnd=0&pmxd=60000&ad_rule=1&cust_params=ttid%3DXwtX3gTf%26frnch%3D__item-franchise__%26environment%3Dproduction%26kwblock%3Ddis%2CAbb%2CWal%2CAir%2CCapOne%2CLincoln%2CCoca%2CUPS%2CVG%2CATTCric%2CTargetbos%2CEFOC_Tar.%2CToyota%2CTylenol%2CNationwide%2CDisney%2CAT%26T+2023%2CAT%26T+Dream%2CKISQALI+420491%2CHulu%2CGM%2Cattefoc%2Cattefoc3%2CBuick2%2CGMBuick2%2CHuluPMP%2CCokeBWIH”,”offset”:”pre”},{“tag”:”https://vid.springserve.com/vast/670880?url=https://www.essence.com/news/watch-in-my-feed-black-women-respond-with-shock-resignation-and-anger-to-donald-trumps-presidential-win/h=450&w=800&cb=2436″,”offset”:”50%”}]”offers”:{“bidders”:[{“id”:”jw-video-XwtX3gTf”,”name”:”jwdemand”,”publisherId”:”evcxFIDZ”,”siteId”:”WT5iFegj”,”placementId”:”24399785″}]”settings”:{“disableConsentManagementOnNoCmp”:true,”mediationLayerAdServer”:”dfp”,”floorPriceCents”:200,”floorPriceCurrency”:”usd”,”buckets”:[{“increment”:0.1,”max”:30,”min”:0},{“increment”:0.5,”max”:50,”min”:30}]}}}; // Configure ad tag on the fly… let additional_params = {}; // Input DVQT signals. if ( dvqt_signals && dvqt_signals.ABS.length > 0 ) { additional_params.ABS = dvqt_signals.ABS.join(“,”); } // Create a string of additional_parameters. let extra_params_str=””; for (enter additional_parameters) { let value = additional_parameters[key]; additional_params_str += `${key}=${value}`; if ( key !== Object.keys( additional_params .pop() ) { additional_params_str += ‘&’; } } // Update ad tag cust_params (must be URL encoded). if ( Object.keys( additional_parameters ). length > 0 ) { let ad_schedule = jw_ad_tag.schedule; if ( ‘undefined’ !== ad schedule type ) { for (let i = 0; i < ad_schedule. length; i++) { let ad_url = new URL(jw_ad_tag. schedule[i].label); let query_params = new URLSearchParams(ad_url.search); query_params.set("cust_params", query_params.get("cust_params") + `&${additional_params_str}`); ad_url.search = query_params.toString(); jw_ad_tag.schedule[i].tag = ad_url.toString(); } } } let playerId; if ("undefined" !== type jwplayerQueue) { playerId = 'jw-video-XwtX3gTf'; jwplayerQueue.push({ 'instanceId': 'playerInstance_XwtX3gTf', 'playerId': playerId, 'config': { pid: 't6KP9zcV', playlist: "https://cdn.jwplayer.com/v2/media/XwtX3gTf", autostart: !jw_ad_tag, repeat: true, mute: true, aspect ratio: "16:9", share: {sites: ["facebook", "twitter", "email", "linkedin"]}, cast: {}, float: {disibility: true}, autoPause: {viewability: true}, displaytitle: true, displaydescription: true, controls: true, related: {displayMode: 'shelfWidget'}, interactive: {} , ad: jw_ad_tag ​​​​} }); } // Load video. jQuery(window).trigger("jw:loadplayers"); function waitForJWPlayer(callback) { if (type jwplayer !== 'undefined') { callback(); } else { setTimeout(function() { waitForJWPlayer(callback); }, 500); } } waitForJWPlayer(function() { jwplayer(playerId).on('adsManager', function (adsManagerLoaded) { let adsManager = adsManagerLoaded.adsManager; let videoElement = document.getElementById(playerId ); let config = { anId: '929481' , campId: '640x360', ias_xps: "autoplay", // autoplay status ias_xbp: "2", // video destination type ias_xar: "1" // autoplay status }; // Start IAS integration googleImaVansAdapter .init(google, adsmanager, videoitem, config } } });

This article was originally published on : www.essence.com
Continue Reading
Advertisement

OUR NEWSLETTER

Subscribe Us To Receive Our Latest News Directly In Your Inbox!

We don’t spam! Read our privacy policy for more info.

Trending