What is Anesthesia?

Anesthesia is Greek for “without sensation”. It is a process that makes the patient feel no pain, injury and related experience during the surgery.

Crawford Williamson

Crawford Williamson (1815 – 1878 ), an American surgeon and pharmacist best known for his first use of inhaled sulfuric ether as an anesthetic.

The originator of modern anesthesia:
▲ The first person to anesthetize the operation with ether
▲ He accidentally discovered that ether dripping on his clothes made the pain of the neck tumor disappear (30/3/1842)

History of Anesthesia

—Cannabis as an anesthetic in Ancient India.

—The discovery and application of inhaled ether drugs in the 18th century. Laughing gas (Nitrous oxide: N2O) has also been found to alleviate pain and tension as well.

—Inventions of intravenous anesthetics in the 20th century.

The first ether inhalation anesthesia surgery (16/10/1846)

Types of Anesthesia

Simply put, there are three types of anesthesia, namely general anesthesia, spinal anesthesia and regional anesthesia.

General Anesthesia

Basically, general anesthesia is suitable for all surgeries that cannot be performed with local anesthesia and regional block anesthesia. To put it simply, general anesthesia is like controlling the headquarters of the central nervous system of the human body, and the entire body is anesthetized and the consciousness is also lost. The advantage of general anesthesia is that it sleeps throughout the whole process without pain, and can control the patient’s heart and lung functions through an anesthesia machine and various drugs to fully ensure safety. Critical surgery is performed using general anesthesia.
Commonly performed clinical general anesthesia methods include inhalation anesthesia, intravenous anesthesia and compound anesthesia.

Spinal Anesthesia

Anesthetic drugs are injected into the subarachnoid or epidural space of the spinal canal, and the spinal nerve roots are blocked to produce anesthesia in the corresponding areas innervated by the nerve roots, collectively referred to as spinal anesthesia. According to different injection positions, it can be divided into subarachnoid anesthesia , epidural anesthesia, combined spinal and epidural anesthesia, and sacral block anesthesia.

Regional Anesthesia

Local injection of local anesthetics during the operation produces an anesthetic effect. To put it simply, anesthesia is used to block the nerve endings to anesthetize a small area. Local anesthesia is suitable for epidermal surgery, small area surgery, short surgery, etc., such as lipoma resection, small trauma debridement and suture, cosmetic surgery, etc.

How Does Anestheisa Work?

Watch the video and learn about the science behind anesthesia explained by Steven Zheng.

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