TE MIT ultrasoun 472MIT’de yapılan araştırmaya göre ultrason dalgaları, cildin ilaç geçirgenliğini arttırabilir. Farklı frekanslarda iki ultrason ışınının kullanıldığı teknikte, iğnesiz ilaç zerki yapılabileceği iddia ediliyor.

Journal of Controlled Release’de yayınlanan makalede MIT Kimya mühendisliğinden Prof Daniel Blankschtein ve Prof Robert Langer, ekipleriyle birlikte biri düşük frekanslı diğer yüksek frekanslı olan iki ultrason ışınının, cildin üst katmanını ayırarak, ilaçların cildin içinden geçerek kana ulaşmasını kolaylaştırdığını açıklıyorlar. Bu şekilde ciltte oluşan hasarın son derece az olduğunu ve acı hissedilmediğini iddia ediyorlar. 

Ultrason enerji, cilt üzerindeki sıvı katmanına verildiğinde, ses dalgaları sıvı içinde kabarcıklar oluşturuyor ve bu kabarcıklar kararsız duruma gelene kadar büyüyor ve içeriye doğru patlıyor. Bu sayede cilt yüzeyini çatlatacak seviyede enerjiye sahip, yüksek hızlı bir sıvı mikrojeti oluşuyor.

Bu etki daha önce de bilinmekteydi ama enerjisi daha yüksek olan düşük frekanslı dalgalar kullanılmıştı. Yüksek frekanslı dalgaların ise enerji seviyelerinin kararsız kabarcıklar yapmak için yeterli olmadığı düşünülüyordu. Ancak, düşük frekanslı dalgalar daha ziyade dağınık bir yapı oluştuduğundan yeterli dozda ilaç molekülünün cilt altına geçmesi sağlanamıyor.

Yüksek frekanslı dalgaların, düşük frekanslıların yanında gönderilmesinin, ekibin açıklamasına göre iki etkisi var: birincisi daha fazla kabarcık oluşmasını sağlıyorlar ve bunları düşük frekanslılar daha sonra patlatıyor; ikincisi ise kabarcıkların sıvı film üzerinde sağa sola kaçmasına engel oluyorlar ve daha düzgün bir geçiş bölgesi oluşuyor, bu sayede de daha fazla dozda ilaç molekülü cilt altına geçebiliyor. 

Domuz cildi üzerinde yapılan denemelerde, ekip, iki farklı frekans seviyesinin, tek frekans seviyesine göre 10 kat fazla glikoz, 4 kat fazla da protein insülini emilimi sağladığını görmüş.

Araştırma şu anda enjeksiyon yerine deri üzerinden geçişle ilaç uygulamasının yaygınlaştırılması için kolaylaştırma ve el tipi ultrason cihazı prototipi üzerinde çalışmalarla devam ediyor.

Adaptasyon: http://www.theengineer.co.uk/sectors/medical-and-healthcare/news/ultrasound-waves-could-make-skin-more-permeable-to-drugs/1013927.article#ixzz26phMNdQR

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  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM josdm_fields AS a LEFT JOIN `josdm_languages` AS l ON l.lang_code = a.language LEFT JOIN josdm_users AS uc ON uc.id=a.checked_out LEFT JOIN josdm_viewlevels AS ag ON ag.id = a.access LEFT JOIN josdm_users AS ua ON ua.id = a.created_user_id LEFT JOIN josdm_fields_groups AS g ON g.id = a.group_id LEFT JOIN `josdm_fields_categories` AS fc ON fc.field_id = a.id WHERE ( (`a`.`context` = :context AND (`fc`.`category_id` IS NULL OR `fc`.`category_id` IN (:preparedArray1,:preparedArray2,:preparedArray3,:preparedArray4)) AND `a`.`access` IN (:preparedArray5,:preparedArray6)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray7,:preparedArray8)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform ORDER BY a.ordering ASC537μs4.81KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `a`.`id`,`a`.`title`,`a`.`catid`,`a`.`language`, CASE WHEN CHAR_LENGTH(`a`.`alias`) != 0 THEN CONCAT_WS(':', `a`.`id`, `a`.`alias`) ELSE a.id END AS `slug`, CASE WHEN CHAR_LENGTH(`cc`.`alias`) != 0 THEN CONCAT_WS(':', `cc`.`id`, `cc`.`alias`) ELSE cc.id END AS `catslug` FROM `josdm_content` AS `a` LEFT JOIN `josdm_categories` AS `cc` ON `cc`.`id` = `a`.`catid` WHERE `a`.`catid` = :catid AND `a`.`state` = :state AND `a`.`access` IN (:preparedArray1,:preparedArray2) AND (`publish_up` IS NULL OR `publish_up` <= :nowDate1) AND (`publish_down` IS NULL OR `publish_down` >= :nowDate2) ORDER BY CASE WHEN `a`.`publish_up` IS NULL THEN `a`.`created` ELSE `a`.`publish_up` END DESC1.11ms20.22KBParams/plugins/content/pagenavigation/src/Extension/PageNavigation.php:205Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `josdm_categories` AS `s` INNER JOIN `josdm_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`363μs3.94KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT `m`.`id`,`m`.`title`,`m`.`module`,`m`.`position`,`m`.`content`,`m`.`showtitle`,`m`.`params`,`mm`.`menuid` FROM `josdm_modules` AS `m` LEFT JOIN `josdm_modules_menu` AS `mm` ON `mm`.`moduleid` = `m`.`id` LEFT JOIN `josdm_extensions` AS `e` ON `e`.`element` = `m`.`module` AND `e`.`client_id` = `m`.`client_id` WHERE ( ( (`m`.`published` = 1 AND `e`.`enabled` = 1 AND `m`.`client_id` = :clientId AND `m`.`access` IN (:preparedArray1,:preparedArray2)) AND (`m`.`publish_up` IS NULL OR `m`.`publish_up` <= :publishUp)) AND (`m`.`publish_down` IS NULL OR `m`.`publish_down` >= :publishDown)) AND (`mm`.`menuid` = :itemId OR `mm`.`menuid` <= 0) ORDER BY `m`.`position`,`m`.`ordering`952μs18KBParams/libraries/src/Cache/Controller/CallbackController.php:51Copy
  • SELECT `a`.`id`,`a`.`title`,`a`.`alias`,`a`.`introtext`,`a`.`fulltext`,`a`.`checked_out`,`a`.`checked_out_time`,`a`.`catid`,`a`.`created`,`a`.`created_by`,`a`.`created_by_alias`,`a`.`modified`,`a`.`modified_by`,CASE WHEN `a`.`publish_up` IS NULL THEN `a`.`created` ELSE `a`.`publish_up` END AS `publish_up`,`a`.`publish_down`,`a`.`images`,`a`.`urls`,`a`.`attribs`,`a`.`metadata`,`a`.`metakey`,`a`.`metadesc`,`a`.`access`,`a`.`hits`,`a`.`featured`,`a`.`language`,LENGTH(`a`.`fulltext`) AS `readmore`,`a`.`ordering`,`fp`.`featured_up`,`fp`.`featured_down`,CASE WHEN `c`.`published` = 2 AND `a`.`state` > 0 THEN 2 WHEN `c`.`published` != 1 THEN 0 ELSE `a`.`state` END AS `state`,`c`.`title` AS `category_title`,`c`.`path` AS `category_route`,`c`.`access` AS `category_access`,`c`.`alias` AS `category_alias`,`c`.`language` AS `category_language`,`c`.`published`,`c`.`published` AS `parents_published`,`c`.`lft`,CASE WHEN `a`.`created_by_alias` > ' ' THEN `a`.`created_by_alias` ELSE `ua`.`name` END AS `author`,`ua`.`email` AS `author_email`,`uam`.`name` AS `modified_by_name`,`parent`.`title` AS `parent_title`,`parent`.`id` AS `parent_id`,`parent`.`path` AS `parent_route`,`parent`.`alias` AS `parent_alias`,`parent`.`language` AS `parent_language` FROM `josdm_content` AS `a` LEFT JOIN `josdm_categories` AS `c` ON `c`.`id` = `a`.`catid` LEFT JOIN `josdm_users` AS `ua` ON `ua`.`id` = `a`.`created_by` LEFT JOIN `josdm_users` AS `uam` ON `uam`.`id` = `a`.`modified_by` LEFT JOIN `josdm_categories` AS `parent` ON `parent`.`id` = `c`.`parent_id` LEFT JOIN `josdm_content_frontpage` AS `fp` ON `fp`.`content_id` = `a`.`id` WHERE `a`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`access` IN (:preparedArray3,:preparedArray4) AND `c`.`published` = 1 AND `a`.`state` = :condition AND `a`.`id` <> :articleId AND `a`.`catid` IN (:preparedArray5) AND (`a`.`publish_up` IS NULL OR `a`.`publish_up` <= :publishUp) AND (`a`.`publish_down` IS NULL OR `a`.`publish_down` >= :publishDown) ORDER BY a.ordering DESC LIMIT 5450μs39.02KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `josdm_categories` AS `s` INNER JOIN `josdm_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`348μs3.95KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM josdm_fields AS a LEFT JOIN `josdm_languages` AS l ON l.lang_code = a.language LEFT JOIN josdm_users AS uc ON uc.id=a.checked_out LEFT JOIN josdm_viewlevels AS ag ON ag.id = a.access LEFT JOIN josdm_users AS ua ON ua.id = a.created_user_id LEFT JOIN josdm_fields_groups AS g ON g.id = a.group_id WHERE ( (`a`.`context` = :context AND `a`.`access` IN (:preparedArray1,:preparedArray2)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray3,:preparedArray4)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform ORDER BY a.ordering ASC515μs4.06KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `c`.`id`,`c`.`asset_id`,`c`.`access`,`c`.`alias`,`c`.`checked_out`,`c`.`checked_out_time`,`c`.`created_time`,`c`.`created_user_id`,`c`.`description`,`c`.`extension`,`c`.`hits`,`c`.`language`,`c`.`level`,`c`.`lft`,`c`.`metadata`,`c`.`metadesc`,`c`.`metakey`,`c`.`modified_time`,`c`.`note`,`c`.`params`,`c`.`parent_id`,`c`.`path`,`c`.`published`,`c`.`rgt`,`c`.`title`,`c`.`modified_user_id`,`c`.`version`, CASE WHEN CHAR_LENGTH(`c`.`alias`) != 0 THEN CONCAT_WS(':', `c`.`id`, `c`.`alias`) ELSE `c`.`id` END as `slug` FROM `josdm_categories` AS `s` INNER JOIN `josdm_categories` AS `c` ON (`s`.`lft` <= `c`.`lft` AND `c`.`lft` < `s`.`rgt`) OR (`c`.`lft` < `s`.`lft` AND `s`.`rgt` < `c`.`rgt`) WHERE (`c`.`extension` = :extension OR `c`.`extension` = 'system') AND `c`.`access` IN (:preparedArray1,:preparedArray2) AND `c`.`published` = 1 AND `s`.`id` = :id ORDER BY `c`.`lft`2.6ms3.95KBParams/libraries/src/Categories/Categories.php:375Copy
  • SELECT DISTINCT a.id, a.title, a.name, a.checked_out, a.checked_out_time, a.note, a.state, a.access, a.created_time, a.created_user_id, a.ordering, a.language, a.fieldparams, a.params, a.type, a.default_value, a.context, a.group_id, a.label, a.description, a.required, a.only_use_in_subform,l.title AS language_title, l.image AS language_image,uc.name AS editor,ag.title AS access_level,ua.name AS author_name,g.title AS group_title, g.access as group_access, g.state AS group_state, g.note as group_note FROM josdm_fields AS a LEFT JOIN `josdm_languages` AS l ON l.lang_code = a.language LEFT JOIN josdm_users AS uc ON uc.id=a.checked_out LEFT JOIN josdm_viewlevels AS ag ON ag.id = a.access LEFT JOIN josdm_users AS ua ON ua.id = a.created_user_id LEFT JOIN josdm_fields_groups AS g ON g.id = a.group_id LEFT JOIN `josdm_fields_categories` AS fc ON fc.field_id = a.id WHERE ( (`a`.`context` = :context AND (`fc`.`category_id` IS NULL OR `fc`.`category_id` IN (:preparedArray1,:preparedArray2,:preparedArray3,:preparedArray4,:preparedArray5)) AND `a`.`access` IN (:preparedArray6,:preparedArray7)) AND (`a`.`group_id` = 0 OR `g`.`access` IN (:preparedArray8,:preparedArray9)) AND `a`.`state` = :state) AND (`a`.`group_id` = 0 OR `g`.`state` = :gstate) AND `a`.`only_use_in_subform` = :only_use_in_subform ORDER BY a.ordering ASC503μs4.81KBParams/libraries/src/MVC/Model/BaseDatabaseModel.php:164Copy
  • SELECT `alias`,`catid` FROM josdm_content WHERE `id` = :key111μs1.37KBParams/libraries/src/Component/Router/Rules/PreprocessRules.php:123Copy
  • SELECT SUM(CASE WHEN `a`.`next_execution` <= :now THEN 1 ELSE 0 END) AS due_count,SUM(CASE WHEN `a`.`locked` IS NULL THEN 0 ELSE 1 END) AS locked_count FROM `josdm_scheduler_tasks` AS `a` WHERE `a`.`state` = 1145μs1.37KBParams/administrator/components/com_scheduler/src/Model/TasksModel.php:517Copy
  • SELECT `session_id` FROM `josdm_session` WHERE `session_id` = ?110μs3.5KBParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:277Copy
  • UPDATE `josdm_session` SET `data` = ? , `time` = ? WHERE `session_id` = ?204μs592BParams/libraries/vendor/joomla/session/src/Handler/DatabaseHandler.php:301Copy