This document provides information about general anesthesia and intraoperative awareness. It discusses what general anesthesia is, how its depth is determined, and the different stages of awareness and memory formation. It also covers risk factors for awareness, its incidence and impact on patients. Monitoring techniques like BIS, entropy and EEG patterns are described. Finally, it discusses approaches to preventing and managing cases of intraoperative awareness.
A basic overview on the management of intra-operative bronchospasm: the risk factors, triggers, diagnosis, prevention and management. Includes a case scenario – discussion.
A basic overview on the management of intra-operative bronchospasm: the risk factors, triggers, diagnosis, prevention and management. Includes a case scenario – discussion.
Neuromuscular monitoring, also known as train of four monitoring, is a technique used during recovery from the application of general anesthesia to objectively determine how well a patient's muscles are able to function. It involves the application of electrical stimulation to nerves and recording of muscle response using, for example, an acceleromyograph. Neuromuscular monitoring is typically used when neuromuscular-blocking drugs have been part of the general anesthesia and the doctor wishes to avoid postoperative residual curarization (PORC) in the patient, that is, the residual paralysis of muscles stemming from these drugs.
Neuromuscular monitoring, also known as train of four monitoring, is a technique used during recovery from the application of general anesthesia to objectively determine how well a patient's muscles are able to function. It involves the application of electrical stimulation to nerves and recording of muscle response using, for example, an acceleromyograph. Neuromuscular monitoring is typically used when neuromuscular-blocking drugs have been part of the general anesthesia and the doctor wishes to avoid postoperative residual curarization (PORC) in the patient, that is, the residual paralysis of muscles stemming from these drugs.
Sleep and sensory balances (overload and deprivation.pptxShehlaBano3
leep deprivation is a general term to describe a state caused by inadequate quantity or quality of sleep, including voluntary or involuntary sleeplessness and circadian rhythm sleep disorders. Sleep is as important to the human body as food and water, but many of us don't get enough sleep.
The presentation enhances the reader to get comprehensive view about Pain ( physiology of pain, assessment of pain and Management of pain). This will help you to management pain effectively.
Electroconvulsive Therapy is still being used. It is a procedure usually done under general anesthesia, in which small electric currents are passed through the brain, intentionally triggering a brief seizure.
Codeine is used to relieve mild to moderate pain. It belongs to the group of medicines called narcotic analgesics (pain medicines). This medicine acts on the central nervous system (CNS) to relieve pain.
When codeine is used for a long time, it may become habit-forming, causing mental or physical dependence. However, people who have continuing pain should not let the fear of dependence keep them from using narcotics to relieve their pain. Mental dependence (addiction) is not likely to occur when narcotics are used for this purpose. Physical dependence may lead to withdrawal side effects if treatment is stopped suddenly. However, severe withdrawal side effects can usually be prevented by gradually reducing the dose over a period of time before treatment is stopped completely.
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
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Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Anti ulcer drugs and their Advance pharmacology ||
Anti-ulcer drugs are medications used to prevent and treat ulcers in the stomach and upper part of the small intestine (duodenal ulcers). These ulcers are often caused by an imbalance between stomach acid and the mucosal lining, which protects the stomach lining.
||Scope: Overview of various classes of anti-ulcer drugs, their mechanisms of action, indications, side effects, and clinical considerations.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Flu Vaccine Alert in Bangalore Karnatakaaddon Scans
As flu season approaches, health officials in Bangalore, Karnataka, are urging residents to get their flu vaccinations. The seasonal flu, while common, can lead to severe health complications, particularly for vulnerable populations such as young children, the elderly, and those with underlying health conditions.
Dr. Vidisha Kumari, a leading epidemiologist in Bangalore, emphasizes the importance of getting vaccinated. "The flu vaccine is our best defense against the influenza virus. It not only protects individuals but also helps prevent the spread of the virus in our communities," he says.
This year, the flu season is expected to coincide with a potential increase in other respiratory illnesses. The Karnataka Health Department has launched an awareness campaign highlighting the significance of flu vaccinations. They have set up multiple vaccination centers across Bangalore, making it convenient for residents to receive their shots.
To encourage widespread vaccination, the government is also collaborating with local schools, workplaces, and community centers to facilitate vaccination drives. Special attention is being given to ensuring that the vaccine is accessible to all, including marginalized communities who may have limited access to healthcare.
Residents are reminded that the flu vaccine is safe and effective. Common side effects are mild and may include soreness at the injection site, mild fever, or muscle aches. These side effects are generally short-lived and far less severe than the flu itself.
Healthcare providers are also stressing the importance of continuing COVID-19 precautions. Wearing masks, practicing good hand hygiene, and maintaining social distancing are still crucial, especially in crowded places.
Protect yourself and your loved ones by getting vaccinated. Together, we can help keep Bangalore healthy and safe this flu season. For more information on vaccination centers and schedules, residents can visit the Karnataka Health Department’s official website or follow their social media pages.
Stay informed, stay safe, and get your flu shot today!
2. • Privation of senses or Lack of sensory perception
• What is General Anaesthesia ?
• State of unconsciousness or the lack of thought
processing.
3. • Hypnosis ( unconsciousness)
• Analgesia (decreasing pain)
• Amnesia (preventing recall)
• Impairment of skeletal muscle (preventing movement)
• Physiologic support (maintaining respiratory and
• cardiovascular function, fluid management, electrolyte
• control, and thermoregulation )
4.
5. • The crux of the difficulty in defining “anesthetic depth” is
that unconsciousness cannot be measured directly.
• What can be measured is response to stimulation.
6. • The “depth” of anesthesia is determined by
• the stimulus applied,
• the response measured,
• the drug concentration at the site of action that blunts
responsiveness.eg.
• MAC AWAKE
• MAC
• MAC BAR
7.
8.
9.
10. • Awareness—
• Postoperative recall of events occurring during general
anesthesia
• Amnesic wakefulness—
• Responsiveness during general anesthesia without
postoperative recall
• Dreaming—
• Any experience (excluding awareness) that patients are able
to recall postoperatively that they think occurred during
general anesthesia and that they believe is dreaming
11. • Explicit memory—
• Conscious recollection of previous experiences
(“awareness” is evidence of explicit memory)
• Implicit memory—
• Changes in performance or behavior that are produced
by previous experiences but without any conscious
recollection of those experiences (“unconscious memory
formation” during general anesthesia)
12. • is the postoperative recall of sensory perception during
general anaesthesia.
• Rare but serious
• May occur despite apparently sound anaesthetic
management
• Usually not associated with pain.
13. Stage 1: Conscious awareness with explicit memory
Stage 2: Conscious awareness without explicit memory
Stage 3: Subconscious awareness with implicit memory
Stage 4: No awareness
14. • “Definite” awareness
• Recall conversations or music that they hear in the OR during the
period of awareness
• “Probable” awareness
• Hearing voices or feeling discomfort asso with intubation or
surgery
• “Near miss” awareness
• More vague and dream-like
15. • In 1845, Horace Wells
• N2O anesthesia
• Pt moved and cried out
• No recall of his operation
• In 1846, W.T.G. Morton
• Ether anesthesia
• Surgeons considered it a success
• Pt. had been aware, no pain.
• From a pt’s perspective, Well’s anesthetic may
be considered more successful than Morton’s.
16. • Estimation of the incidence of awareness
• Multiple post anesthetic interviews, usually using a modified Brice
interview
The Modified Brice Interview
• What is the last thing you remember before surgery?
• What is the first thing you remember after surgery?
• Do you remember anything happening during surgery?
• Did you have any dreams during surgery?
• What was the worst thing about your surgery?
17. • Over all
• 1 or 2 cases out of every 1000 patients (0.2%)
• Obstetric 0.4%
• Cardiac cases 1.1-1.5%
• In children 0.8-1.2%.
18. • Awareness results from an imbalance between
anesthetic requirement and anesthetic delivery
• Normal Requirement—Low Delivery
• Low Requirement—Very Low Delivery
• High Requirement—Normal Delivery
19. • Patient related:
• Age
• Sex
• Genetics
• ASA physical status
• Drug resistance or tolerance(substance abuse and chr.
Pain treated with high dose opoids)
• Concurrent medications
• Past history of awareness
• Difficult intubation
20. • Surgery related
• High Risk Surgeries
• Caesarian section (0.4%)
• Major trauma/Emergency (11-43%)
• Cardiac surgery (1.1-1.5%)
21. • Anaesthesia related
• Reduced anesthetic doses in presence of paralysis
• Rapid sequence induction
• total intravenous anaesthesia.
• Nitrous Opioid anesthesia
• Pharmacological masking of signs of inadequate depth of
anaesthesia-
• Use of muscle relaxants
22. • Machine malfunction or misuse resulting in an
inadequate delivery of anaesthesia:
• Drug administration errors
• Mis-labeled drug syringes
• Empty vaporizers
• Leaky gas delivery circuits
• Dysfunctional or misused drug infusion pumps
• Intravenous lines that stopping running
23. • To the patient:
• Intraoperative:
• Most common
• • Sounds and conversation
• • Sensation of paralysis
• • Anxiety and panic
• • Helplessness and powerlessness
• • Pain
24. • Least common
• • Visual perceptions
• • Intubation or tube
• • Feelings operation without pain
26. • PTSD(post-traumatic stress disorder)
• Most harmful consequence
• Depression, anxiety attacks, sleep disorders,
flashbacks to the experience, and nightmares.
• Pt who have no explicit recall of intraop events, but
who develop symptoms suggestive of intra operative
awareness, such as recurrent dreams about being
buried alive.
• A pt’s understanding of their experiences can affect the
psychological impact of awareness.
• Pt may think their awareness is impossible
• Leading them to become confused or question their own sanity.
27. • Towards anaesthesiologist:
• Medicolegal implications
• 2% of total claims
• ASA closed claim database
• 1971 -2001 : 1% - 3% continue growing.
• Reported awards to pts for awareness with recall
• $1000 –$600, 000
28. • Practice Advisory for Intraoperative Awareness and
Brain Function Monitoring:
• Pre op evaluation
• Pre indution phase
• Post operative period
29.
30.
31.
32.
33. • Clinical techniques and conventional monitoring:
• Assess intraoperative consciousness
• checking for movement,
• response to commands,
• eyelash reflex,
• pupillary responses,
• respiratory pattern,
• perspiration and tearing.
34. • Conventional monitoring systems
• ECG,
• blood pressure,
• heart rate,
• end tidal anaesthetic analyzer
• capnography
35. • I. Spontaneous EEG activity monitors:
BIS:
• BIS converts a single channel of frontal EEG into an
index of hypnotic level
• Targeting a range of BIS values 4060 to prevent
awareness
36.
37. • Entropy describes the irregularity, complexity or
unpredictability characteristics of a signal.
• A single sine wave represents a completely predictable
signal (entropy=0)
• A noise from a random number generator represents
• entropy =1
• SE is computed from the EEG in the 0.8- to 32-Hz
range
• RE is computed from facial EMG 0.8 to 47 Hz
38. • SE range is 0 (isoelectric EEG) to 91 (fully awake)
• RE range is 0 to 100.
• The anesthetic range is 40 to 60
• SE outside this range may require a change in hypnotic
dosing.
• whereas if the SE is in this range but the RE is more than
10 above the SE, more analgesic may be required.
39. • Visual classification of the EEG patterns associated with
various stages of sleep.
• The original electronic algorithm classified the frontal
EEG according to:
• A (awake),
• B (sedated),
• C (light anaesthesia),
• D (general anaesthesia),
• E(general anaesthesia with deep hypnosis),
• F (general anaesthesia with increasing burst
suppression).
40. • Patient State Analyser
• SNAP index
• Cerebral State Monitor
41. • From a mathematical analysis of the AEP waveform, the
device generates a AEP index (AAI) that provides a cor-
relate of anaesthetic concentration.
• This AEP index is scaled from 0-100 and the AAI
corresponding with a low probability of consciousness is
<25.
42. • Opioids
• Alone use
• Do not suppress awareness
• Large doses
• Unresponsive to pain
• Respond to loud noises and remain aware of their surroundings
• when added to N2O
• Do not alter the incidence of awareness
• Do not alter basal BIS measurements
• Opioids
• Reduce the amount of cortical arousal asso. with peripheral pain
• Reduce the possibility that surgical pain will cause pt to awaken.
• Psychological trauma asso. with awareness and pain is greater than that
of awarenes without pain
43. • Propofol, barbiturates, etomidate, and
halogenated volatile agents
• Modulate GABA R. activity
• Shift the cortical EEG to lower frequencies
• BIS and EEG based monitor
• Provide strong correlation with hypnosis for this group
44. • N2O and ketamine
• Do not modulate GABA R., but they do produce
hypnosis
• Unchanged or increased high frequency EEG signals
• High reported incidence of dreaming during anesthesia
• BIS and EEG monitors
• Do not accurately predict the depth of anesthesia
• New “ correlates of consciousness”
• Lead to development of more universally applicable monitors
for anesthetic depth.
• Potent analgesia- NMDA receptor inhibition in spinal
cord.
• Suppress cortical arousal during painful stimulation – reduce
the prabability of awareness
45. • N2O-volatile mixtures
• MAC for N2O and voaltile agent
• Additive
• Eg, mixture of 0.5 MAC N2O + 0.5 MAC volatile agent
• Supress movement in response to pain like 1 MAC volatile
• Hypnotic activities of N2O and volatile agent
• Sub-additive
• Eg, mixture of 0.5MAC awake N2O + 0.5 MAC awake volatile
agent
• Is not as hypnotic as 1 MAC awake volatile
• N2O
• Antagonizes the hypnosis induced by volatile agent, perhaps
via direct cortical arousal.
46. • Take patient seriously
• Investigate previous anaesthetic technique &
circumstances
• Comorbidity / medications
• Reassure
• Sedative pre med
• Intraop ET agent monitoring / BiS
• Postop visit
• Good Peri op records
47. • Take patient’s complaint seriously
• Visit patient as soon as possible, along with a witness
• Detailed history – modified Brice interview
• Document patient’s exact memory
48. • Attempt to confirm validity of account
• Patient anaesthetic records / theatre circumstances
• Try to determine cause
• Reassure / offer explanation / document
• Keep a copy of records
• Offer psychological support