ABG/heme Flashcards

(69 cards)

1
Q

Low CO, low CVP, low PCWP, high SVR, SVO2 low

A

Hypovolemic shock

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2
Q

Low CO, high CVP, high PCWP, SVR high, low SVO2

A

Cardiogenic shock

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3
Q

Low CO, low CVP, low PCWP, low SVR, low SVO2

A

Distributive shock or neurogenic shock or anaphylaxis shock

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4
Q

CVP normal

A

0-7
Right atrial pressure
Preload measurement

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5
Q

SVR

A

Resistance of blood flow in body
BP
After load

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6
Q

SVO2

A

Brown port on a swan
% of o2 bound to hemoglobin that returns to right side of the heart
60-80 normal
In shock this is normally higher and associated with higher lactate-tissue is not able to use, bad sign

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7
Q

PAP

A

Systolic and diastolic numbers
“Quarters over dimes”
Normal 15-25 systolic
Normal 8-15 diastolic

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8
Q

PCWP

A

Pulmonary capillary wedge pressure
Indirect of left atrial pressure
Normal 6-12
Ballon inflate at end of swan
Increase- CHF, pulmonary edema, valve stenosis and regurg, HTN
Decrease- Hypovolemia
Rarely used due to complications
Pulmonary artery rupture, infarction, air embolism, arrhythmias

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9
Q

CO/CI

A

CO 4-8 amount of blood the heart pumps through circulation in one minute
CI 2.6-4.2, refers to CO in relation to BSA

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10
Q

PT/INR

A

Measures extrinsic pathway (TF and FVII) and common pathway Factors 2, 5, 10, 1
Prolonged- vitamin K deficiency, liver disease; deficiency of any factors like 7, 10, 2, 5, use of warfarin

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11
Q

aPPT

A

Intrinsic pathway with factors 12, 11, 9, 8
And common pathway factors 2, 5, 10, 1 and monitoring of heparin
Prolonged may be due to deficiency or inhibition in any coagulation factor except 7
Monitoring of heparin

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12
Q

Thrombin time

A

Measures final step In clotting cascade
Conversation of fibrinogen to fibrin
Prolonged in heparin use, direct thrombin inhibitors, fibrinogen degradation products, disorder of fibrinogen

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13
Q

D dimer

A

Helpful in excluding if no RF (DIC, DVT, PE, malignancy, inflammation, hyper coagulation; trauma, thromboembolism)
If positive not enough diagnostics
If negative can aid in exclusion

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14
Q

Fibrinogen levels

A

Used for bleeding disorder diagnosis and monitoring of DIC
Decreased in liver disease, DIC, fibrinolytic therapy, congenital

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15
Q

Anti factor Xa

A

May be used to evaluate effects of anticoagulant from agents with direct or indirect inhibition of factor Xa activity like heparin, LWMH, direct factor Xa inhibitors

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16
Q

Prolonged aPTT but normal PT/INR

A

Von wilderbrands disease
Factor 8,9, 11, 12 deficiency
Pre kallikrein
HMW kininogen
Heparin
Lupus anticoagulant

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17
Q

Prolonged PT/INR, normal aPTT

A

Liver disease
Vitamin K deficiency
Warfarin

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18
Q

Prolonged aPTT and prolonged PT/INR

A

Issues in the common pathway
Deficiency of prothrombin, fibrinogen; factor 5 or 10
Combined factor deficiency
Liver disease, DIC; over anticoagulant with warfarin
Draw a thrombin time-if normal issue lies with factor issues in 2,5, or 10

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19
Q

Normal aPTT and PT/INR but still bleeding

A

Thrombocytopenia
Platelet dysfunction
Von wilderbrand disease

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20
Q

Neutropenia fever coverage

A

Anti pseudo beta lactam-cefepime, meropenem, imipenem-cilastatin, piperacillin-tazobactam
May add aminoglycoside, fluoroquinolones, or vanco if hypotension, mental status change, focal findings like PNA or cellulitis or resistance is suspected or proven
Low risk OP can do coronet beta lactam like augmentin

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21
Q

Tumor lysis syndrome criteria

A

Uric acid greater than 8 or 25% increase above baseline
Potassium greater than 6 or 25% increased above baseline
Phosphorus greater than 6.5 or 25% increase above baseline
Calcium less than 7 or 25% decrease from baseline
Do not correct calcium without correcting phosphorus first

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22
Q

Tumor lysis syndrome TX

A

Monitor lytes 4-6 hrs
Rasburicase (elitek) IV can cause RBC hemolysis, hypersensitivity, methemoglobinemia do not use with bicarbonate
IV hydration greater than 3000 ml per day
Loop diuretics
Cardiac monitor
Phosphate binders
Dialysis
Tx hyperkalemia
Allopurinal for prevention along with IV hydration

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23
Q

Cyclophosphamide (cynical) ADE

A

Alopecia
Myelosuppression
Hemorrhagic cystitis
Cardiac toxicity in high doses

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24
Q

Ifosfamide (ifex) ADE

A

Alopecia
Myelosuppression
Hemorrhagic cystitis
Neurotoxicity

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25
Carboplatin (paraplatin) ADE
Myelosuppresion Lyte imbalance Neuropathy Nephrotoxicity
26
Methotrexate ADE
Myelosuppresion Hepatotoxicity Neurotoxicity Photosensitivity Pulmonary toxicity Nephrotoxicity
27
Dacarbazine ADE
Photosensitive Myelosuppresion Anorexia Hypotension Flu like symptoms
28
Cisplatin (planitol) ADE
Myelosuppresion Lyte imbalance Neuropathy Nephrotoxicity
29
Cytarabine (ARA-C) ADE
N/V Rash Flu like symptoms Myelosuppresion Neurotoxicity Ocular toxicity
30
Fluorouracil (5-FU) ADE
Diarrhea Myelosuppresion Mucositis Photosensitive Cardio toxicity
31
Gencitabine (gemzar)
N/V Rash Flu like symptoms Fever Diarrhea Myelosuppresion Edema Elevated transminases
32
Vinblastine (velban) ADE
Constipation Myelosuppresion Alpaca Bone pain Mailed Toxic effects on colon
33
Vincristine (oncovin) ADE
Constipation, toxic effect of colon Peripheral neuropathy Alopecia
34
Pacilataxal (taxol) ADE
Diarrhea Myelosuppresion Neuropathy Alopecia Edema Mucositis
35
Danuorubicin (cerubidine) ADE
N/v/d Red orange urine Myelosuppresion Cardiotoxic in certain doses
36
Doxorubicin (adriamycin) ADE
N/v/d Red orange urine Myelosuppresion Cardiotoxic in certain doses
37
Etoposide (vepesid) ADE
N/v/d Fever Hypotension Myelosuppresion Alopecia Fatigue
38
Proximal DVT
Involves popliteal vein, femoral vein, iliac veins above the knee DVT in superficial femoral veins are still DVTs and should be treated as such Higher mm and complications Treated with anticoagulants u less contraindications
39
Distal DVT
Confined to veins of the calf below the knee Less risk for PE may not require treatment 1/3 will extend to the proximal vein within first two weeks of dx
40
Wells clinical prediction for DVT
Low moderate or high risk High greater than 2 Moderate 1-2 Low 0
41
PE
Usually from proximal DVT Large S wave in lead 1 and Q wave in lead 3, inverted T wave in lead 3 Wells criteria for PE CTA first if contraindications to contrast, renal disease, CHF, hypotension inability to lay flat do VQ scan with or without Doppler of LE
42
TX of VTE
Can tx if OP IF-hemodynamically stable, low risk for bleed, has normal renal function, compliant IP if-intractable pain or complete venous obstruction leading to impaired arterial flow If they do not need low risk criteria they need to be hospitalized If unstable need ICU-hypoxia, hypotension, tachypnea, tachycardia, right ventricular strain, or failure, SS of CHF, large or multiple PEs, saddle PE If stable can do floor
43
What VTE needs treatment
All proximal DVTs All PEs some instances a segmental may not need tx, if no involvement of proximal arteries and no proximal DVT then they can just be monitored Chronic DVTs do not generally need anticoagulants Isolated distal DVTs without severe symptoms or RF or extension can be monitored for serial imaging in 2 weeks if propagation occurs then TX is needed Anticoagulants can be deferred if clot does not extend
44
Anticoagulants for VTE
Contraindications-active bleed, severe bleeding diathesis, platelets less than 50,000 recent planned or emergent high bleeding risk surgery or procedure, major trauma, history of ICH Use IVC filter then Xarelto, Eliquis mono therapy Dabigatran or edoxaban after tx with LMWH Warfarin in conjunction with heparin, LWMH, fondaparinux Or LMWH which has better efficacy than heparin
45
Choices of anticoagulants parenteral
Heparin-80 unit per kg bolus then 18 unit per kg per hr, titration for aPTT 1.5-2.5 times normal, prior, 6 hrs start and 6 hours after change, reverse with protamine sulfate, RISK FOR HIT, monitor platelets daily, ok to use in renal pts do not use if platelets less than 50,000 Lovenox-1 mg /kg, no lab requires, no reversal agent, moderate risk for HIT, do not use in platelets less than 50,000 contraindicated in CC less than 30 Fondaparinux- weight based, no labs needed, no reversal agent, low risk for HIT, do not use in platelets less than 50,000 contraindicated in CC less than 30
46
How long do you give anticoagulants for VTE
Proximal provoked and unprovoked DVT and PE should be treated for 3 months Isolated distal DVT should be treated for 3 months CA with a VTE and a low risk of bleeding means indefinite anticoagulants If high risk then 3 months of therapy First and second unprovoked VTE with low and medium bleeding risk should be treated indefinitely
47
Platelet count
Greater than 50,000 adequate 30-50 rarely have purpura even with trauma 10-30 asymptomatic, increased risk for bleeding 10 develops spontaneously bleeding, petechiae present
48
Unstable PE
Unstable with SBP less than 90 tx with thrombolytics if no contraindications otherwise embolectomy if there Failed thrombolytic therapy, shock will cause death, high risk for bleed rtPA 100 mg over two hours followed by heparin drip no bolus High risk for bleed so only use if unstable
49
If a patient who experiences a recurrent VTE while on oral therapy they should be changed to LMWH and consult hematology
50
Eliquis
Preferred in pt with GI cancers as Xarelto can increase risk of bleeding
51
Activated protein C resistance
Most common is factor V Leiden Can be acquired due to pregnancy, elevated factor 8, oral contraceptive, presence of antiphospholipid antibodies, protein S deficiency, malignancy
52
Prothrombin gene mutation
Most common in whites Inherited thrombophilia Excess prothrombin Dx with prothrombin G20210A and mutation in PCR
53
Protein S deficiency
Autosomal dominant Protein S Activates protein C which inactivates factor Va and VIIIa Eval with free protein S level Do not perform if on anticoagulants or for three months post thrombus Heparin and LMWH do not interfere with test
54
Protein C deficiency
Autosomal dominant Protein C is activated by protein S to form APC which inactivates 5a and 8a Eval with protein C functional assay Do without anticoagulants DIC or liver disease or within 3 months of clot, cancer, cancer therapy, uremia, infection or inflammatory condition
55
Antithrombin deficiency
Autosomal dominant Antithrombin slowly inactive thrombin May be resistant to heparin Eval with Antithrombin functional assay if abnormal draw an Antithrombin antigen to determine subtype Perform 3 months after thrombotic event and off anticoagulants
56
Hyperhomocysteinemia
Acquired deficiencies in B6, B12 or folic or generic-autosomal recessive Causes alteration in the enzyme methylenetetrahydrofolate reductase normally helps to covert homocysteine to methionine thus elevates homocysteine level Eval with homocysteine level TX- vitamin supplementation do not have any effect on the incidence or recurrent of VTE, TX or screening is not recommend in person with VTE
57
Thrombocytopenia
Post op Hemodilution Hypersplenism HIV, bone marrow failure, viral infections-rubella, mumps, varicella, parvovirus, hep C, Epstein Barr, alcohol, bacteria, sepsis, malignancy, B 12 or folate deficiency: SLE Drugs- sulfas, levaquin, quinine, heparin, rifampin, beta lactams, tegretol, vanco, linezolid, pipercillin, depakote, Dilantin, anti platelets
58
Thrombotic thrombocytopenia purpura
Thrombocytopenia with microangiopathic hemolytic anemia and thrombosis results in organ damage Medical emergency Neurological or renal SS but can affect any organ Large amounts of VWF and lack AdamTS13 protein-leads to platelet aggregation and thrombi Antibodies with AdamsTS13 Due to autoimmune, congenital, HIV, CA, drugs-quinine, mitomycin, cyclosporine, cisplatin, bleomycin, clopidogrel, other anti platelets, post OP CBC, PT, aPTT, decreased heptagon, schistocytes, fibrinogen normal to high, d dimer may be normal or high, BUN/CR elevated, LDH elevated, bilirubin elevated ADAMTS13 Less than 10% is diagnosis and confirms Consult heme Plasma exchange, steroids, retuximab
59
VWD
Inherited bleeding disorder Autosomal dominant Decreased VWF plasma VWF antigen, factor 8 for diagnostic testing TX consult heme, recommend VWF, DDVAP
60
Immune thrombocytopenia
Primary- acquired due to autoimmune platelet destruction Secondary- triggered by another condition Severe if platelets less than 20 Can be due to viral infection, CLL, SLE Platelet destruction IgE SS of bleeding and low platelets DX by exclusion, isolated low platelet less than 100 Good H&P! h pylori testing HIV and HCV testing PT/PTT Thyroid levels BM biopsy Vitamin B12and folate level ANA TX- platelet transfusion, IVIG, steroids if severe, minor TX with steroids, IVIG
61
HIT
Type 1- decrease platelet count 2 days post heparin start, mild, and returns ti normal with continued heparin admin, ok to continue heparin Type 2*-immune mediated drug reaction results in platelet destruction, severe, stop heparin HIT antibodies, binds to factor 4, causing thrombosis and thrombocytopenia Heparin for more than 1 week, less with LMWH Platelet count drop 5-10 after suspect if receiving heparin and drop is greater than 50%, new thrombocytopenia less than 150 and no Cannot otherwise explain drop DX-4 T score (thrombocytopenia, timing, thrombosis, presence of other cause thrombocytopenia), test for moderate to high probability, use ELISA for anti platelet factor 4 antibodies, if not confirmatory use serotonin release assay Use of non heparin anticoagulants TX-Stop heparin and avoid forever, argatroban can be used do not use Coumadin initially Avoid platelet transfusions
62
Uremic bleeding
Usually seen in Stage 5 CKD Multi factorial causes Platelets in uremic state cannot aggregate Dialysis does improve platelet dysfunction but does not improve risk of bleeding Heparin can also contribute TX-HD, DDAVP, correct anemia, estrogen, cryopreciptiate
63
Physical signs of bleeding
Coagulopathy- joint bleeds, tissue hematomas, large lumps ecchymosis, bleeding post surgery, trauma or injury tends to be delayed Thrombocytopenia-mucosal bleeding, petechiae, bleeding immediately after trauma or injury
64
Hemophilia A
Sex linked recessive mainly males Bleed in joints and GIB Spontaneous bleeding is indicative of more severe disease Normal players Normal PT Prolonged aPTT Decreased factor 8 Avoid NSAIDs Heme consult Factor replacement DDVAP
65
Hemophilia B
Sex link recessive disorder Affects more male Joint bleeds and GIB Spontaneous bleeding indicates severe disease Normal platelets Normal PT Prolonged aPTT Decreased factor 9 tx same as type A but replace factor 9 and cannot use DDVAP
66
DIC
Underlying disease usually due to CA, sepsis, obstetrics cx, trauma; hemolytic reactions, malaria, ARDS, rhabdo, snake bites Coagulation cascade and fibrinolytic cascade Organ failure Prolonged PT and PTT Low fibrinogen Elevated d dimer Less than 100 platelets Increased thrombin time Rule our severe liver disease, HIT, TTP
67
Supratherapuric INR secondary to warfarin
4.5-10 with no bleeding no Tx needed Greater than 10 and no bleeding oral vitamin K Major bleeding use factor 4 with vitamin K 5-10 mg IV FFP can be used to reverse Coumadin but not effective as factor 4
68
DOAC clearance
Dabigatran 2.5-3.4 days after last dose Xarelto 1-2 days after last dose Eliquis 1.5-3 days after last dose Edoxaban 1.3-2 days after last dose Bextrixaban 4-5.5 days after last dose PT/PTT not reliable for coagulation status
69
Reversal agents
Dabigatran-idarucizumab Eliquis and Xarelto- andrxanet alpha