Surgery: Block 1 Flashcards
What is one of the most important features of a SurgHx?
What is the first part when investigating this feature?
What is the most important aspect of this feature?
Pain
How it began
PTs reaction to it
PT shrieking/thrashing is either ? or could have ?
PT in true pain due to infection, inflammation or vascular dz may present what type of movement?
Gross over reaction
Renal/biliary colic
Extremely restricted movement
What is a common complaint found during a pre-op Hx that is not of much significance?
When does this become an issue?
Change in bowel habits
Constant/regular becomes cyclic diarrhea/constipation= suspect colon Ca
What is the MC error when providers are presented with bleeding from the rectum?
A complete exam of a surgical PT includes what five steps?
Hemorrhoid Dx
PE Special Labs X-rays F/u exams
What is the first and second thing immediately assessed when conducting an elective surgery PE?
What are the objectives of doing Labs during a pre-op work up?
Why is a Neg GI study not truly negative?
Physique/habitus and then, hands
Screening for ASx Dz (anemia, DM)
Dz c/i elective/req Tx prior to surgery (DM, HF)
D/o requiring surgery (HyperThyroid, Pheo)
Metabolic/septic complications
Ulcers/Neoplasms not excluded, especially in R colon
Ordering INR/PTT would be warranted during a Pre-Op prior to ? procedures?
What is the relation w/ the blood bank prior to a surgery?
Little post-op bleeds threshold (brain, spine, neck)
INR- bile obstruction, malnutrition, absent terminal ileum= dec Vit K absorption
Blood typing alone
Pre-op labs include ?
What is a True Liver function test?
What is MC acquired nosocomial infection and RFs
CBC CMP PT/INR
PT/INR + Total Bili, Albumin
Lower UTI- Retention Instrumentation Contamination
Dx by exam, confirm w/ culture
Who signs a pre-op consent form?
When can consent form signing be waived?
Who can sign for the PT if they’re unavailable or physically able to sign
Surgery team member, PT, Witness NOT on team
Emergencies, two Drs sign
Medical power of attorney
If emergency surgery is needed and signed consent may be affected, who needs to be notified?
What is the universal protocol for pre-op precautions
When/how is hair removed from a surgical site?
Hospital administrator
Site/sign location
Time out prior to first cut
Electric clippers immediately prior
What meds may be taken on the day of surgery w/ sip of water
HN
Hormones Neuro
BARHOPS
BB Alpha ant/agonist Reflux HTN OCP Psych
CCC
CBC Cardiac rhythm COPD
HNP
Hormone Nitrate Peptic diatheses
Why may PTs be advised to NOT take their ACEI prior to surgery
When are ABX given prior to surgery
If additional ABX are needed during surgery, when are they given?
General anesthesia refractory HOTN
W/in 1hr of incision
Every 2 t1/2 (q4hrs for Cefazolin*, Augmenten)
Operations that involve bacteroides should have ? ABX added to the regime
Surgical ABX are chosen by ?
Multiple doses or prolong ABX use post-op are more likely during ? procedures?
Metronidazole
Hospital antibiogram
GI Tract
Implantation
Contaminated wounds
ImmComp PTs
ABX given to PTs for prophylaxis are not continued after surgery except for ? procedures?
What is the ASA Classification system for?
Vascular grafts
Cardiac surgery
Joint replacement
Degree of perioperative risk for PTs
1: health PT, no systemic d/o
5: moribund, won’t survive 24hrs w/out operation
What are examples of Cat 5 ASA PT
What is the APACHE II System for?
How is the Mallampati classification scoring done?
Trauma w/ shock
Ruptured AAA w/ shock
Cerebral trauma w/ inc ICP
Massive PE
Severity of illness in ICU PTs to predict mortality
Open mouth, tongue out w/out saying ‘ah’
What are the 6 things evaluated when conducting a Mallampati
NTC PST
TMJ C-spine Dentition Short neck Tracheal deviation Neck mass
Respiratory complications are bad because of what 4 increased things
Pulmonary complications can be as minor as ? and extend in severity up to ?
Most costly
Inc re/admission, 30 day mortality
Atelectasis
Pneumonia/Resp Failure
What are the risk factors for a PT to develop post-op pulmonary complications?
What PE findings may indicate an underlying pulmonary Dz
Functional dependence AMS Malnutrition
CHF Alcohol COPD Inc age ASA
Dec breath sounds
Wheeze
Rhonchi
Prolonged expiratory phases
If PT has mitigating pulmonary complications during pre-op, what two tests may be done prior to surgery, especially ? procedure
How are PTs w/ very low, low, mod or high risk of VTEs managed post-op?
PFT ABG
Lung resection
Very Low= early ambulation Low= mechanical prophylaxis and ICPs
Mod= LMWH, UFH, IPC
High= IPC and LMWH/UFH
What are the 6 independent factors in a RCRI
If PT has findings indicative of ischemic heart dz, cardiac Sxs or abnormal EKG on pre-op have what f/u test ordered?
Deck 1, Slide 24
Hx ischemic Heart Dz CHF- JVD/S3 CerebroVDz High risk operation Pre-op Tx w/ insulin Pre-op SrCr >2.0mg
Stress test: Treadmill,
Dipyridamole/Adenosine-thallium
Dobutamine echo
What is the most widely used Dx test to evaluate for CADz
If there is a risk of a peri-operative re-infarct after an MI, try to postpone surgery by ? mon
Exercise electrocardiography until Sxs or ST segment shifts, enhanced w/ T-201
> 6mon
What are the two goals of pre-op fasting?
Avoid drinking/eating how far in advance to surgery?
Min volume, max pH
No drinking 2hrs prior
No light/heavy meals 6-8hrs
Infant- 4hrs breast milk, 6hrs formula
What would be signs that liver failure is occurring post-op and what labs would be ordered?
Pre-op eval of the hepatic system includes ? two measurements used for calculating ?
Spider telangiectasis
Jaundice
PT INR PTT
Total bili and INR
CTP or MELD
What are PTs given who are identified to have bleeding risks and when are they given?
If PT w/ hepatic issues develops worsening encephalopathy, ? is accumulating and it’s Tx w/ ?
Vit K/FFP- on call to OR
Ammonia tx w/ Lactulose
PTs w/ liver dz risk ? outcome w/ surgery
What are the decompensation risk %s per CTP scoring
Decompensation
Class A: 2-10%
Class B: 12-30%
Class C: 12-82% w/ 63% mortality rate
PT w/ elevated pre-op BUN= ?
PT w/ elevated creatinine= ?
All Pts w/ ? need to have these two labs drawn during the pre-op
Dehydration
Inc mortality
Renal impairement
Proteins/glucose found in a UA mean?
Casts found in urine mean ?
What can the urine Na/Creatinine can be used to calculate?
Injured glomeruli
Nephritis Glomerulonephritis Tubular necrosis
Fractional excretion of sodium- determines if origin of renal failure is pre/post renal
What would be seen in a UA indicating an infection?
What part of the UA results indicate the PTs hydration level?
What is the name of the peri-operative fluid management program showing to reduce incidences of adverse post-op events?
Leukocyte esterase
Nitrites
SpecGrav- norm 1.010
Goal directed/Protocol based fluid restriction
If post-op PT has oliguria, what is it due to and how is it corrected?
What step may be done during pre-op neuro eval to examine for occult Dzs?
Secondary to hypovolemia
IV fluids, not diuretics
Carotid artery stenosis (bruit)
Define Neuropraxia
How is Neuropraxia classified
Mildest form of nerve injury from over stretching joints; MC Sx- loss of motor function
Transient conduction block of motor/sensory function w/out nerve degeneration
? type of PT Hx may indicate greater chance for development of a Surgical Site infection?
These chances are higher following ? procedures
DM
Cardiac
Or inc stay/infection risk in non-cardiac PTs
What is the desirable glucose range for critically ill PTs
Chronically hyperglycemic PTs are frequently ? and ? is used in the InPT setting for fluids
<140 fasting
<180 regular
Dehydrated
IV Dextrose
Pain causes ? release and subsequent ? release
Intravascular volume loss will cause PT to develop ? Na
ACTH- Epi, NorEpi, Cortisol
ADH from PostPit
Low serum Na due to water retention
Why should pre-op PTs not suddenly stop use of steroids
What is the recommendation instead of stopping
PTs must have ? thyroid prior to surgery
What can happen if this requirement is not met
Addisonian crisis- HOTN, HypoNa, HyperK+
Stress dose steroids
Euthyroid
Hyper: thyroid storm
Hypor: cardiac failure
Why would supplemental steroids be given to PTs pre-op
PTs undergoing ? moderate or ? major stress procedures should have addistional CCS administered
1* or 2* adrenal insufficiency
Currently on >20mg of Pred
Hx chronic steroid use and
Cushingoid appearance
Mod: LE revascularization, total joint replacement
Sev: cardiothoracic, abdominal, CNS
What is used to prevent a thyrotoxicosis development
What med is used for Graves PTs to reduce the vascularity of the gland and control hyperthyroidism
Methimazole or Propylthiouracil and BBs
Potassium Iodide
What findings are seen if PT has perioperative hypothermia
How is this corrected
Hypothyroidism
PO Levothyroxine
PTs w/ thyroid goiters should avoid ? imaging procedure
PTs need to stop blood thinners ? before surgery
? PE finding can indicate PT has hemophilia
CT w/ contrast, may provoke thyrotoxicosis
Warfarin- 5 days
7 days
Deformed joints
Joint bleeds
? blood component is an independent risk factor for developing SSI?
If PT is mod/sev malnourished, how long will it take on re-feeding regime before changes are seen?
Hypoalbuminemia <3.0mg
1wk
What use/benefit does albumin have?
What blood component is preferred and considered more superior?
Long t1/2, low Sen/Spec
Malnutrition PTs don’t always have hypoalbuminemia
Critical care PT- reflects Dz severity
Preablbumin- High sensitivity, short t1/2
Inc PAB= dec inflammation, response, not improved nutrition
What lab finding may suggest chronic malnutrition?
What result would suggest acute malnutrition?
Albumin <3g, t1/2 of 14 days
Prealbumin <16mg, t1/2 of 2 days
__% weight loss can result in delayed wound healing, anergy or decreased pulmonary reserve
Anergy is also indicative of ?
12% or more
Immune response failure
What fluids are used in the pre-op setting for fluid resuscitation
If internal milieu is lost, what system can suffer irreversible consequences
Crystalloids- NS, LR
PRBCs
Neuro
? of body fluid is ? while the remaining is ?
Of the remaining fluid, how is it divided up?
2/3 intracellular (K+)
1/3 extracellular (Na)- 1/3 similar to seawater
3/4 interstitium
1/4 intravascular
How are intracellular Na levels kept low?
Hypovolemic induced oliguria produces ? type of urine
What purpose does the FENa hold?
NaKATP pump
Low volume/Na, hypertonic
Differentiating cause of oliguria
1% or less= Prerenal azotemia, aggressive Na reclamation
>1%= Tubular injury preventing proper Na reclamation
Hypovolemia in surgical PTs is due to loss of ? fluid
Hypovolemia stimulates aldosterone to be secreted from ? causing ?
Isotonic
Zone glomerulosa adrenal cortex
Inc Na/water absorption
What post-op findings are indicative the kidneys are trying to retain volume
Oliguria is also a consistent finding of early ?
Na <20 mEq Chloride- useless unless metabolic alkolosis Osmolality >500 SrCr ratio >20 BUN >20
Shock in the absence of hyperosmolar induced diuresis
? is a consistent finding of early and moderate shock
All hypovolemic PTs have inadequate output if urine output is less than ? after 30min wait
What is considered normal urine output for an adult
Oliguria
Adult: <0.5mL/kg/hr
Child: <1mL/kg/hr
Infant: <2mL/kg/hr
1L/24hrs
0.5mL/kg/hr
How much insensible fluid loss occurs from skin, lungs and GI tract
SpecGrav > ? indicates hypovolemia
Skin/lung: 600ml/24hrs
GI: 250ml/24hrs
> 1.020
What is an early but non-specific sign of shock?
What is the most sensitive of all the early signs of shock?
PTs w/ distended neck veins while elevated to 30* and no cardiac compression need to have ? r/o
Cold skin
Dec blood flow to skin
Hypovolemic shock
Criteria for profound hypovolemic shock is ? and will have ? VS always be low
After resuscitating hypovolemic shock, ? finding will always be present
> 30%
BP
Metabolic acidemia
What are three reasons to start an IV?
What are early signs of shock?
There is always a low filling pressure to ? chamber of the heart during hypovolemic shock?
Volume depletion
About to be NPO > 12hrs
Inc insensible losses
Diminished flow to skin*
Difficulty getting IV access
Cold skin- early, non-specific
RA
What is the purpose of doing a PAC
This procedure is only done for ? PTs
Swan Ganz in central venous to distal PulmArt to measure:
central venous pressure
capillary wedge pressure
RV SV
Cardiac instability w/ multiple comorbidity
3 benefits of placing a Foley
What are the indications to place a Foley
Hematuria
Output monitoring
Empties bladder
Prolonged sedation
I/Os
Pre-Op
Neurogenic bladder
S/Sxs PT has cystitis?
S/Sxs PT has pyelonephritis
Dysuria, mild fever
High fever Flank pain Ileus
Following few days post-surgery, what type of fluid balance change is commonly seen?
Post-op PT w/ HypoNa is Tx w/ ? but NOT ?
Post-op PT w/ dec UOP is Tx w/ ?
Fluid/E+ retention due to ADH secreted from pain, N/V, opiates or PPV
NS and water restriction
No hypertonic saline
Bolus IVF, not diuretic
In PTs w/ normal renal function, what are some of the best indicators of fluid volume status?
How much urine output indicates successful resuscitation for shock has occurred?
Mental status
Urine output
HR/BP
30cc/hr
What are 5 issues that can cause hyponatremia
PTs w/ CNS S/Sxs related to HypoNa are Tx w/ ?
CHF CSWS Hyperglycemia Liver Dz SIADH
NS and free water restriction
What is the adverse outcome from increase Na too quickly?
Why are DM PTs at higher risk of developing HypoNa post-surg?
Osmotic demyelination
Hyerpglycermia- draws water from intracellular space to extracellular space
In surgical settings, HypoK is developed by ? 3 things
What are the S/Sxs of HypoK
Refractory HypoK to parenteral Tx methods get ? as the next step?
GI loss Diuretic Malnutrition
Diaphragm paralysis
Flat/inverted T
Prominent U
HypoMg Tx
PTs w/ prolonged alkalosis from HypoK can develop ? issue
What are the hallmark signs of HypoK
Paradoxical aciduria- nephron conserves HCl and K, loss of H+
Dec muscle contraction leading- diaphragm paralysis, ECG changes (flat T, prominent U, arrythmias)
HyperK is often cause by ? but can also be due to ?
How does HyperK present on EKG
Renal/adrenal insufficiency
Crush Burns
Flat P
Peaked T
Wide QRS
What level of HyperK is considered a medical emergency?
How is it Tx
> 6.5mmol, reqs conitinuous EKG monitoring
IV 50% dextrose in water
10u regular insulin
Ca gluconate
Inhaled B adrenergic agonist
What does the HyperK Tx meds to for protection/Tx
What Tx step can be added to Tx of HyperK if PTs kidneys are intact and normal?
What is the method if kidney function is severely decreased?
BIG- push K from extra to intracellular spaces
CaGlu- inc excitability threshold to protect myocardium
Loop/TZD diuretic
Hemodialysis
If PT developed HyperK w/ slow/gradual onset, what PO med can be used for Tx?
What is an automated hydration status device used for monitoring and what is it used in conjunction with?
PO Sodium Polystyrene sulfonate
Edwards EV1000 w/ serum lactate
After severe trauma/sepsis, how do PTs show signs of Intravascular coagulation?
When would a hemodynamically stable but critically ill PT receive blood transfusion?
Prolonged clotting times
Low platelets, fibrinogen
Production of fibrin degeneration products/monomers
Hgb <7.0 (Hct 21%)
What is the antifibrinolytis used for adjuncts to hemorrhage control?
How does initial fluid resuscitation begin?
What fluid is preferred in the ER trauma bays?
Tranexamic acid
Warm crystalloid: NS or LR
Severe shock AND arterial pH <7.20= LR
Lactate + H+= lactic acid
LA liver oxidized into H2O/CO2, removed by lung/kidney
Isotonic crystalloid LR- lower Cl (NS Cl ions hyperchloremic metabolic acidosis)
Bile and fluids in small intestine have an E+ content similar to ?
Saliva, gastric juice and R colon fluids have high ? and low ?
LR
High K, low Na
What fluids are used in resuscitation secondary to hypovolemia?
Avoid adding extra ? in first 24hrs post-surg because?
Crytalloids- LR or NS
K, aldosterone inc post-surg= saved K+ ions
Define Maintenance Rate
How is Maintenance Rate maintained?
Define Replacement Rate
Dehydrated or NPO >12hrs,
Factored at 30ml/kg/24hr
5% Dextrose in 0.45% NaCl w/ 20mEq K/L
LR replacement to avoid causing E+ imbalance
Fluid losses exceeding ?mL need to have E+ concentrations measured
Heparin/saline locks are useful when?
Abdominal pain assessment divides area into ? 3
1500mL
ABX, PRN pain meds
GI Biliary GU
What is the bloody vicious triad
Type specific blood products should be available w/in ? long, otherwise use ?
What does whole blood contain and when is it used?
Hypothermia Coagulopathy Acidosis
20min: O- PRBCs, if unavail-
O+
Factors RBCs Ags Plasma 5/8 Anticoagulanta
Non-functional platelets and granulocytes
Massive loss/hypovolemia
In a non-bleeding 70kg PT, a transfusion of one RBC unit will inc Hgb by ? and Hct by ?
What is the first step in a massive transfusion protocol?
1g, 3%
1L isotonic crystalloid- LR/NS
Empiric transfusion
No excess crystalloids, worsens coagulopathy/vicious triad
Per TCCC guidelines, what is the fluid of choice for resuscitation from most to least?
What type of Trauma PT would receive the 1:1:1 fluid resuscitation?
Whole Plasma/RBCs Platelets Plasma RBCs Plasma or RBCs Hextend Crystalloids- LR/PLA
Severe shock
Intraperitoneal blood
Complex pelvic Fx
Bilateral femur Fx
What are the colloids?
FFP- clotting factors, 30min thaw
Whole blood: RBCs, plasma from walking donors w/ Ag, low titer O-
Albumin- not for acute resuscitation; volume expansion- LF, burns, nephrotic syndrome
PRBC- preferred over whole blood
PLT- for active bleeds w/ platelets <50K; 1unit inc x 25K
Hextend
Tranexamic Acid
Hypertonic Saline
6% hetastarch in lactated E+ w/ large sugars to inc intravascular volumes; max 1500ml/24hr- inc mortality/AKI
Antifibrinolytic- strengthens clots, improves survival <3hrs of injury (CRASH-2 Trial- HOTN/Tachy w/in 8hrs)
3-23.4%- fluids to intravascular space during head injuries- inc cerebral perfusion pressure, dec ICP
Not through peripheral IVs
Define Uremic bleeding and how it’s Tx
Cryoprecipitate
Renal Dz- platelet dysfunction w/ severe anemia and uremia
Tx w/ DDAVP, Conjugated Estrogen, Cryoprecipitate or RRT- stims vWF release
Cardiac surgery- soluble coag factors: vWF, Fibrinogen/ectin, Factor 8/9
Multiple factor deficiencies
vWF levels below _% are at risk for massive hemorrhage
How is VWDz corrected
Antifibrinolytics are preferably used in ? setting
30%
Desmopressin, Cryoprecipitate or vWF/F8
Massive hemorrhage- Aprotinin, TranAcid, AminoCaproic Acid: reduce transfusions in elective/cardiac surgeries
If LE veins used for IV access, must be decannulated w/in __hrs to minimize risk for ?
IO infusions target veins where but is not recommended for longer than ?
24hrs: thrombosis, infxn
Medullary sinus
24hrs
Where can central lines be placed
Central lines are placed using ? technique
Subclavian Jugular Femoral Cephalic vein
Seldinger
What is unique about the PICC
Indications for arterial line
What are the three broad categories of peripheral IV complications
Peripheral vein to SVC= central venous catheter
No risk for PTx
Arterial pressure monitor
Repeat ABGs/blood samples
NOT for volume replacement
Mechanical (MC thrombophlebitis) Infection
Metabolic
MC adverse effect of internal jugular and femoral venous line attempts?
MC adverse effect of subclavian line attempts?
Artery puncture
Pneumothorax
How does an air embolism present and how is it Tx
How can this adverse outcome be avoided during line placement?
Severe distress HOTN
Cogwheel murmur
Durant position: Trandelenburg and LLD- emoblus to apex of RV, needle aspiration
PT in Trandelenburg position