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Hello ladies and gentlemen.
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Here are a series of questions and answers to start you thinking about anesthesiology.
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I'll follow that with a short history of the specialty and a discussion on how anesthesiology has changed the world.
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A common question I'm asked and it's a reasonable question.
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I've been told that I will be asleep during my surgery.
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I don't think surgery could be performed on me if I were just asleep.
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Is general anesthesia the same as sleep?
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General anesthesia is not just deeper sleep.
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It's much better compared to a state of reversible coma.
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It's a type of coma that we can induce and we can reverse, and yes, we can reverse it,
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and you will wake up from your anesthetic.
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The second common question I'm asked is, I've been told that I will be paralyzed during my surgery.
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Isn't this dangerous?
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How will I breathe?
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This statement is often accompanied by my students with statements like, that's really gross and how would you do that to people?
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The answer is you may be paralyzed during your surgery
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if the surgeon requires muscle relaxation to complete the surgery successfully
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and safely or if the anesthesiologist must place a breathing tube in your trachea.
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The anesthesiologist is responsible for managing your breathing and will make sure that you have no memory for this whole experience.
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Third question that's commonly asked is, will I remember being operated upon?
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You will remember entering the operating room and being introduced to the team members
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that are going to be involved in your surgery.
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You will then be given an anesthetic, which will eliminate all memory of the surgical experience itself.
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And you will not be awakened, and you will not reform your memory until the surgery is completed.
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After the anesthetic is gone, won't I have a lot of pain?
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When anesthesia is properly delivered, the provider assures that pain prevention is an important aspect of the care.
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Before the end of surgery, the anesthesiologist will provide you with painkillers that will produce good pain relief when you wake up.
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In addition, the nurses in the recovery room will give you additional pain relief if you require it.
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So here's a definition from the Oxford Dictionary.
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It's not sleep.
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Surgery cannot be performed under conditions of normal sleep.
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Period.
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And the Oxford Dictionary says, An anesthetic that affects the whole body and it usually causes a loss of consciousness,
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i .e., he had an operation under general anesthesia.
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Anesthesia.
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The critical word here is a reversible drug -induced state of unconsciousness, which is characterized by a coma -like state under the control of the anesthetist,
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a term that is also known as anesthesiologist, depending on what part of the world you're in.
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It's often associated with muscle paralysis.
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It's always associated with profound amnesia for the surgical event.
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So how did anesthesia develop?
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Well, it's all thanks to the dentists.
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Doctors can't take any credit for it.
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Prior to 1846, there was no known way to provide anesthesia to those undergoing surgery.
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The whole process of surgery was extraordinarily painful, bloody and dirty.
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Surgeons were praised for the speed, not skill, in their sexful completions of operations.
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Surgical procedures were either very superficial, drainage of abscesses or removal of small skin lesions, or major amputations of limbs,
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caesarean section, all without any anesthesia.
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The Massachusetts General Hospital, at the time that this whole event occurs, was the busiest surgical site in North America.
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It provided surgical procedures to an average of five patients a week.
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After 1846, longer, more complex surgical procedures developed,
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and the field of surgery exploded.
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Now over 100 procedures are done at Massachusetts General Hospital a day,
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and new surgical procedures are being developed at a very rapid pace.
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So the first dentist we're going to talk about is Dr. Horace Wells.
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He's the real father of anesthesiology, although the term's been used on many individuals.
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Yes, he was a dentist.
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In 1844, he went to a party.
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It was a nitrous oxide party where people gathered and enjoyed themselves and breathed nitrous oxide,
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usually out of a big paper bag.
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And one of the things he noticed was a woman smashed her leg very hard against a bench
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and ended up with a large laceration on her leg, which should have been extremely painful.
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She had no sense of pain whatsoever from it.
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And from this observation, he then went about using nitrous oxide in his dental practice.
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He had his own tooth extracted under nitrous oxide anesthesia and had very little discomfort.
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And in 1845, he demonstrated nitrous oxide for surgical anesthesia at the Massachusetts General Hospital.
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Unfortunately, as you're going to learn in this course, nitrous oxide is not a strong anesthetic.
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And it was a dismal failure.
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And he was shamed before all the physicians in Massachusetts and the dentists.
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Nitrous oxide provides good analgesia, good pain control, but cannot provide full anesthesia.
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So the patient cried out during the surgery, Wells was humiliated, and he ultimately committed suicide.
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This was a typical advertisement in those days for a laughing gas party, nitrous oxide party.
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So you can see, laugh, sing, dance, speak, or fight, all those wonderful things you could do with nitrous oxide on board.
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So the next dentist to come along was Dr. William Morton, also in Massachusetts.
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He had actually been predated by Dr. Crawford Long in Great Britain, who did do surgery under ether anesthesia, but didn't bother publishing his results.
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So the first described and known event in general anesthesia occurred on October 16, 1845.
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Dr. Morton provided anesthesia to a young man having a tumor removed from his neck under ether anesthesia.
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And the chief surgeon turned to the crowd in the room and said, in the very pompous way of that
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Victorian era, gentlemen, this is no humbug.
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And Morton's name was made.
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Morton was a bit of a scamp,
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unfortunately, and he tried to make more out of this than he was able to by coloring ether orange
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and then trying to patent it as orange ether,
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claiming it was superior to regular ether that had actually been around as a solvent and cleaning agent for centuries.
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So this is a painting of that first event and this is from 1845 at the Massachusetts General.
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This operating room is still in existence and you can visit it if you wish,
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but you can see how very different the world was then than it is now.
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All these people gathered around the operating room table wearing street clothes.
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They may, in fact, be people right off the street because like public executions,
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surgery was a popular spectator sport in the mid part of the 19th century.
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You can see Morton holding his bottle of ether and the surgeon working on the young man's neck.
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So that started general anesthesia for general surgery.
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But it was important to move beyond that to other areas of need.
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And the area that was likely to be missed in all of this was obstetrical anesthesia.
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Partly this was due to the biases of the era that said,
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you know, pain during labor was a required part of woman's recompense for original sin.
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Well, there was a very powerful lady in existence in that era in Great Britain.
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That was Queen Victoria.
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And she wasn't willing to be punished for something that might have happened in the Garden of Eaton.
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And with her eighth child, she had 11, I believe, she asked Dr. John Snow,
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who was the first practicing anesthesiologist in Great Britain, to provide her with anesthesia.
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Snow's an interesting man.
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And for those of you who are aware of the London pump cholera story,
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it's the same John Snow who discovered that pump and was able to prevent cholera from spreading in London.
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And so in a way, he's the father of epidemiology, and he's also one of the fathers of anesthesiology.
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Very amazing man.
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Anyway, after she delivered her baby, Queen Victoria said, Dr. Snow gave the blessed chloroform, and the effect was soothing,
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quieting, and delightful beyond measure.
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And from that moment forward, obstetrical anesthesia had a solid place in medicine.
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So this is what it looked like to start with.
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This is a bottle of ether and a Schimmelbush mask.
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And the mask is basically just a wire mask that you laid some gauze over,
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and you poured ether directly on the gauze and put the mask
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and gauze over the patient's face and they breathe the vapor.
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This is a modern anesthetic machine, a little bit fancier than the Schimmel -Busch mask,
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much more sophisticated, full of very complex warning systems and monitoring systems, which we'll discuss in more detail in a later lecture.
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Other forms of anesthesia that have developed include regional anesthesia, which developed as local anesthetics were created,
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and one of the first people involved in this story was Sigmund Freud, who thought that cocaine would be both a useful medication
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and felt that it would be particularly useful in the treatment of depression.
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And unfortunately, Sigmund Freud had to withdraw this belief in a later period because one of his best friends,
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who was a very famous American surgeon, became addicted to cocaine and died from its use.
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In any case, the use of cocaine and other simple local anesthetics led to the development of spinal and epidural anesthesia.
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And we can now provide complete loss of sensation to many parts of the body, and particularly the limbs, for surgery.
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Spinal anesthesia is the commonest form of anesthesia for cesarean sections,
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for instance, whereas epidural anesthesia is useful for pain relief during labor or after certain types of surgery.
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Spinal anesthesia is often used for surgery of the legs.
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With modern ultrasound equipment, it is now possible to pass a needle directly to a nerve without perforating the nerve
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or hitting blood vessels under direct vision using ultrasound.
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And this has revolutionized the use of regional anesthesia over the last 5 to 10 years.
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Anesthesia is an extremely safe medical specialty.
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It's one of the safest interventions in modern medicine.
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My practice started in 1980.
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At that time, people used to die on the operating room table.
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In 2014, it's extraordinarily rare for this to happen.
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In developed countries, the mortality rate from general anesthesia is usually stated to be around 1 in 10 ,000
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or maybe as high as 1 in 20 ,000.
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The rate is much lower, however, in young, healthy individuals.
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Also in developed countries, the rate of permanent neurologic damage from spinal or epidural anesthesia is less than 1 in 100 ,000.
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So in a career, most anesthesiologists will never see this happen.
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So our lecture series is going to be laid out like this.
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An introductory lecture, which you're hearing now, a lecture on physiologic aspects of anesthesia, drugs used in anesthesia, and anesthetic systems.
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We'll then move into the more clinical aspects of the specialty and talk about general anesthesia, regional anesthesia, emergencies in the operating room,
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intensive care of patients, pain management, and anesthesia for special populations such such as the pregnant patient,
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children, thoracic anesthesia, neuroanesthesia.
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And then at the very end, we'll summarize everything and we'll have a short discussion about anesthesia and its use in other medical disciplines,
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and the future of anesthesia, and some of the opportunities for young anesthesiologists opening into the future.
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So in this lecture, we've summarized the history of anesthesiology
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and given you a bit of an overview of what general anesthesia and regional anesthesia look like.
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We're going to go into a great more detail in the subsequent lectures, and I hope you join us for those.
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Vocabolario e note di pronuncia per questa lezione
Questa lezione di conversazione si basa sul video “Anesthesiology: Basics – Anesthesiology”. Le parole che ritornano più spesso: anesthesia, surgery, anesthetic, nitrous, oxide. Questo video contiene 148 frasi e 1942 parole da ripetere con lo shadowing. Il parlato dura 13:33. Chi parla mantiene un ritmo costante di circa 143 parole al minuto, comodo per lo shadowing. Solo il 79% delle parole rientra nelle 3.000 più comuni dell’inglese, quindi il lessico è impegnativo.
Vocaboli chiave di questo video
15 parole del video che vale la pena imparare, con pronuncia e significato:
| Parola | Pronuncia | Significato |
|---|---|---|
| oxide sostantivo | /ˈɑksaɪd/ | ossido |
| surgical aggettivo | /ˈsɝd͡ʒɪkəl/ | chirurgico |
| lecture sostantivo | /ˈlɛk.t͡ʃə/ | conferenza, lezione |
| procedure sostantivo | /pɹəˈsiː.d͡ʒə/ | procedura, iter |
| mask sostantivo | /mæsk/ | maschera, mascherina |
| breathe verbo | /bɹiːð/ | respirare |
| surgeon sostantivo | /ˈsɝd͡ʒən/ | chirurgo |
| dentist sostantivo | /ˈdɛntɪst/ | dentista |
| spinal aggettivo | /spaɪ.nəl/ | spinale |
| aspect sostantivo | /ˈæspɛkt/ | aspetto |
| cocaine sostantivo | /koʊˈkeɪn/ | cocaina |
| specialty sostantivo | /ˈspɛʃ.əl.ti/ | specialità |
| coma sostantivo | /ˈkoʊmə/ | coma |
| muscle sostantivo | /ˈmʌs.əl/ | muscolo |
| reverse sostantivo | /ɹɪˈvɝs/ | contrario, opposto |
I phrasal verb che sentirai
| Parola | Pronuncia | Significato |
|---|---|---|
| wake up verbo | /ˌweɪk ˈʌp/ | svegliarsi |
Frasi da ripetere
Frasi brevi e complete del video che puoi riutilizzare nella conversazione di tutti i giorni:
- How will I breathe?
- Third question that's commonly asked is, will I remember being operated upon?
- After the anesthetic is gone, won't I have a lot of pain?
La grammatica di questo video
Le strutture che chi parla usa di più, con le parole esatte del video:
| Struttura | Nel video |
|---|---|
| Forma passiva be + participio passato — conta ciò che accade, non chi lo fa | I've been told · could be performed · is often accompanied |
| Present perfect have/has + participio passato — un’azione passata che conta ancora adesso | has changed · I've been told · term's been |
| Frasi relative who / which + frase — un’informazione in più su una persona o una cosa | anesthetic, which will · unconsciousness, which is |
Pronuncia a cui fare attenzione
Chi parla usa 21 contrazioni e forme ridotte, come we'll, you're, I'm. Pronunciale nella forma breve, così come le senti.
- I suoni “th”: breathe /bɹiːð/, gather /ˈɡæðɚ/, bother /ˈbɑðɚ/, eighth /eɪtθ/, tooth /tuθ/
- I suoni “sh” e “zh”: specialty /ˈspɛʃ.əl.ti/, execution /ˌɛk.sɪˈkjuː.ʃən/, prevention /pɹɪˈvɛnʃən/, intervention /ɪntɚˈvɛnʃən/, completion /kəmˈpliː.ʃən/
- Parole lunghe — attenzione all’accento: superior /sʊˈpɪɹ.i.ɚ/, successfully /səkˈsɛs.fə.li/, execution /ˌɛk.sɪˈkjuː.ʃən/, intervention /ɪntɚˈvɛnʃən/, eliminate /ɪˈlɪm.ɪ.neɪt/
I suoni difficili per chi parla italiano:
- /h/ — va soffiata, non è muta: whereas /(h)wɛɹˈæz/, whatsoever /ˌ(h)wʌtsoʊˈɛvɚ/, humiliate /hjuːˈmɪliˌeɪt/
- Consonante finale — senza aggiungere una vocale dopo: oxide /ˈɑksaɪd/, mask /mæsk/, dentist /ˈdɛntɪst/, aspect /ˈæspɛkt/, reverse /ɹɪˈvɝs/
- /æ/ — più aperta della “e”: mask /mæsk/, aspect /ˈæspɛkt/, gather /ˈɡæðɚ/, whereas /(h)wɛɹˈæz/, rapid /ˈɹæp.ɪd/
Come esercitarsi con questo video
- Ascolta tutto il video una volta senza parlare e annota le parole che non conosci.
- Fai shadowing frase per frase a velocità normale, ripetendo ognuna finché il tuo ritmo coincide con quello di chi parla.
- Registrati e confronta con l’originale, facendo attenzione a parole come oxide, surgical, lecture.
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.