(SYNOPTIC) Surgery Flashcards
What website would you use for guidance on drug cessation pre/post surgery?
UKCPA
The Handbook of Perioperative Medicines
What does the term ‘pre-med’ refer to?
Medicines given prior to surgery
What does the term ‘anastomosis’ refer to?
Artificial connection made between 2 ends of the same organ, during surgery
Usually blood vessels/ loops of intestine
What does the term ‘dehiscence’ refer to?
Breaking open of a wound/ incision site
What does the term ‘adhesions’ refer to?
Fibrous bands that form between tissues/ organs
Result of injury following surgery
Scar tissue which attaches to organs
What does this prefix refer to? angio-
Related to blood vessels
What does this prefix refer to? arthr-
Related to joints
What does this prefix refer to? colono- or col-
Related to the large bowel
What does this prefix refer to? cysto-
Related to the bladder
What does this prefix refer to? gastr-
Related to the stomach
What does this prefix refer to? hyster-
Related to the uterus
What does this prefix refer to? lapar-
Related to abdominal cavity
What does this prefix refer to? mammo-/masto-
Related to the breast
What does this prefix refer to? nephro-
Related to the kidney
What does this suffix refer to? -ectomy
To remove
What does this suffix refer to? -otomy
To open up
What does this suffix refer to? -ostomy/-stomy
Artificial opening/ hole
What does this suffix refer to? -oscopic
To use a scope
What does this suffix refer to? -plasty
To modify/ reshape
What is a paralytic ileus?
Intestinal blockage in the absence of a physical obstruction
Usually a malfunction in the nerves/ muscles of intestine
What is wound dehiscence?
Breakdown of a wound
What is the breakdown of a wound called?
Wound dehiscence
What is a blockage in the intestine, in the absence of a physical obstruction, called?
Paralytic ileus
What is a pre-op assessment, briefly?
Determining anaesthetic risks
Predicting complications
What is conducted in a pre-op assessment?
(1) Anaesthetic review
(2) Does any medication need to be stopped?
- provide alternative if necessary
(3) Communicate (1) and (2) to patients
(4) Plan for potential post-operative complications
What is the role of pre-op pharmacists?
- Drug history taking
- Prescribing regular medications
- Giving advice on appropriate medication management during the peri-operative period
- Foresee post-op complications before they arise
- Smoking cessation counselling
- Producing guidelines for pre-op team
- Preparing for discharge
How is anaesthetic risk to a patient assessed?
ASA classifications
What are the ASA classification categories?
(1) ASA-I
(2) ASA-II
(3) ASA-III
(4) ASA-IV
(5) ASA-V
(6) ASA-VI
What are some high risk patient groups for anaesthesia?
- Cardiovascular problems
- Multiple co-morbidities
- Asthma/ COPD
- Elderly
What is ASA-I?
Normal healthy patient
What is ASA-II?
Patient with mild systemic disease
What is ASA-III?
Patient with severe systemic disease which is limiting but not incapacitating
What is ASA-IV?
Patient with a severe systemic disease that is a constant threat to life
What is ASA-V?
Moribund patient who is not expected to survive without operation
- moribund = person at point of death
What is ASA-VI?
Declared brain dead patient
Organs are being removed for donor purposes
What ASA classification is a normal healthy patient?
ASA-I
What ASA classification is a patient with mild systemic disease?
ASA-II
What ASA classification is a patient with severe systemic disease which is limiting but not incapacitating
ASA-III
What ASA classification is a patient with a severe systemic disease that is a constant threat to life
ASA-IV
What ASA classification is a moribund patient who is not expected to survive without operation?
ASA-V
What ASA classification is a declared brain dead patient
ASA-VI
Why do RA patients often have impaired wound healing?
RA patients are often on immunosuppressants
Impacts healing
What are the 7 areas of pharmaceutical intervention in surgery?
(1) Pain
(2) PONV
(3) NBM period
(4) VTE prophylaxis
(5) Fluid management
(6) Anticoagulation in peri-operative period
(7) Antibiotic prophylaxis
What is pain rated a 2-5/10 treated with?
Paracetamol +/- ibuprofen
What is pain rated a 5-8/10 treated with?
Codeine/ dihydrocodeine/ co-codamol
What is pain rated 8-10/10 treated with?
Morphine/ diamorphine/ fentanyl
What is PCA?
Patient-controlled analgesia
What are the benefits of PCA?
Gives patient control of their pain
Do not have to wait for nurse
How long does a PCA lock out for following use?
5 minutes
What are the benefits of a local anaesthetic nerve block?
Good pain relief results for fracture
What drug is given in spinal pain management?
Diamorphine
What is an epidural?
Pain management, injected into epidural space
Consists of local anaesthetic and opioid
What are the advantages of PCA?
- Patient in control
- Lockout period prevents overdose
- Fast-acting
- Improves patient experience
- Reduces patient anxiety
- Useful for incident pain
- Suitable if patient NBM
- Patients do not have to have multiple injections
What are the disadvantages of patient controlled analgesia (PCA)?
- Renal impairment, due to accumulation of morphine metabolites
- Not to be used with other opioids
- Side effects, N+V, pruritus, constipation, sedation
- May wake up in pain if patient sleeps without pressing
- Not suitable for all patients
Which takes faster effect in PCA, morphine or fentanyl?
Fentanyl
160x more liposolubility
Which is cheaper, morphine or fentanyl?
Morphine is cheaper
Which is worse for the kidney, morphine or fentanyl?
Morphine
Metabolites build up causing renal impairment
When is methadone prescribed in hospital?
Hospitalised heroine users
Are long-acting or short-acting opioids preferred during hospital admission?
Long-acting
Potentially fewer side-effects
What is buprenorphine OST?
Buprenorphine opioid substitution treatment
What is mu-opioid receptor blockade?
Buprenorphine dose >12mg/ day
Achieves minimal analgesic effect
What are some pharmacological methods of VTE prophylaxis?
- LMWH
- Heparin
- Rivaroxiban/ dabigatran
- Fondaparinux
What is Fondaparinux?
Synthetic anticoagulant
Used for VTE prophylaxis
What are some non-pharmacological methods of VTE prophylaxis?
- TED stockings
- Foot pumps
What duration of surgical procedure is deemed to increase risk of VTE?
60 minutes- pelvis/ lower limb
90 minutes - normally
What patient age is associated with increased risk of VTE?
> 60yrs
What BMI is associated with increased risk of VTE?
> 30kg/m2 (obese)
Which patient groups are at increased risk of PONV?
- Young + female
- Non-smoker
- History of PONV/ motion sickness
- Use of pre-post op. opioids
What are some consequences of PONV?
- Delayed administration of opioid analgesia
- Wound disruption after abdominal/ max factor surgery
- Bleeding
- Dehydration + electrolyte imbalance
- Interference with nutrition
- Patient discomfort + distress
- Delay in recovery
Which drugs are most commonly used for PONV treatment and prevention?
(1) Cyclizine
(2) Ondansetron/ granisetron
(3) Dexamethasone
What are some drugs less commonly used for PONV treatment and prevention?
- metoclopramide
- domperidone
- hyoscine
What route(s) of administration routes are used for cyclizine?
IV/ IM
What route(s) of administration routes are used for ondansetron?
IV
What route(s) of administration routes are used for metoclopramide?
IV
SC can be used but is unlicensed
What route(s) of administration routes are used for hyoscine?
Transdermal
What route(s) of administration routes are used for prochlorperazine?
Buccal
When are PO anti-emetics avoided?
When patient is actively experiencing N+V?
What are some non-pharmacological methods to improve PONV?
- Rehydration + pain management
- Minimise opioid use
- Ginger/ mint
- Acupuncture
- Avoid nitrous oxide
What is the NBM period, with regard to surgery?
Specific time pre- and post-op that a patient is advised to not eat or drink during
Why can a patient not be induced on full analgesia when on a full stomach?
High risk of regurgitation of stomach contents
What considerations should be made during a NBM period?
(1) Medications to stop
- Half-life of drugs
(2) Medications to continue
- Alternative routes
(3) Length of NBM period
(4) Interactions with anaesthetic medications
Describe the half-life of levothyroxine.
Long
How long before a major surgery should warfarin be stopped?
5 days
How long before major surgery should aspirin be stopped?
10 days
Why does aspirin have to be stopped before major surgery?
Increases bleeding risk
Takes 10 days to replenish platelets
What should be done if patient is on warfarin but surgery is emergency?
Reversal with vitamin K
How may anaesthesia affect patients with hypertension?
May provoke tachycardia/ high BP
What should a warfarin patient’s INR be prior to surgery?
<1.5
What would be some examples of vascular organ surgery?
- Liver
- Spleen
- Thyroid
How long before surgery should dabigatran be stopped, if the patient has low bleeding risk and CrCl of ≥80mL/min?
24hrs
How long before surgery should dabigatran be stopped, if the patient has high bleeding risk and CrCl of ≥80mL/min?
48 hours
What should be done if patient is on dabigatran but surgery is emergency?
Idarucizumab
Dabigatran antidote
How is the fluid status of a patient assessed?
A - Airways B - Breathing C - Circulation D - Disability E - Exposure
How is fluid resuscitation achieved?
Fluid bolus
What are some risk factors for surgical site infections?
- Diabetes
- Corticosteroid use
- Obesity
- Malnutrition
- Extremes of age
- Recent surgery
- Smoking
- Immunodeficiency status
- Renal impairment
- Liver impairment
- ASA class 3/4/5
- Bacterial colonisation
For surgery, when must the first prophylactic antibiotic dose be given?
Before skin incision is performed
Ideally within 60 minutes of time of incision
How are prophylactic antibiotics selected?
Should be chosen against organisms most likely to cause infection