1920s: Arthur Guedel and Ralph Waters developed the cuffed endotracheal tube to create a secure, closed anesthetic airway. Post author:admin Post published: October 7, 2026 Post category:Uncategorized Post comments:0 Comments You Might Also Like Dr. Hartog Jacob Hamburger invented normal saline in 1896. October 7, 2026 Wallace H. Coulter patented the Coulter Principle—using electrical impedance to rapidly count and size microscopic cells—and introduced the Model A electronic counter, making the modern automated CBC possible. October 7, 2026 About October 6, 2026 Leave a Reply Cancel replyComment *Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Notify me of follow-up comments by email. Notify me of new posts by email.
Wallace H. Coulter patented the Coulter Principle—using electrical impedance to rapidly count and size microscopic cells—and introduced the Model A electronic counter, making the modern automated CBC possible. October 7, 2026
