Sepsis Flashcards
ACID-BASE BALANCE
The process of regulatingthe pH, bicarbonateconcentration, and partialpressure of carbon dioxideof the body fluids
Regulated through respiratory and renal functions
GAS EXCHANGE CONCEPT
The process by which oxygen is transported to the cells and carbon dioxide is transported from the cells
PERFUSION CONCEPT-
pumps, pipes, and volume
The flow of blood through arteries and capillaries delivering nutrients and oxygen to cells and removing cellular wastes
IMMUNITY CONCEPT
A physiologic process that provides an individual with protection or defense from disease
Lab values for SIRS and Sepsis Spectrum
CBC (H&H, WBC, Platelet)
CMP
ABG
Procalcitonin
Lactate
PT
CRP AND CPK
WBC
5000-10000
Bands WBC > 10%
blood has a lot of immature WBCs circulating
- shift to the left
< 100000 platelets
thrombocytopenia
Albumin
3.4-5.4 pulls fluid into intravascular supporting
Total Protein normal
6-8.3 g
BUN normal
6-20
CR normal
0.6-1.3
BUN and CR measure
kidney function
Total Bilirubin normal
0.1-1.2
Procalcitonin normal
<0.1
Procalcitonin increases
when there is an infection present
Procalcitonin rises within _____________ of inflammation
2-4 hours
If procalcitonin is present, then it can help
identify tx methods
Lactic acid normal
<1
Lactic acid excess is made when
Excess production from tissue hypoperfusion (anaerobic metabolism)
Lactic acid elevated levels have a strong association with
high mortality rates
Lactate serves as
metabolic fuel for the heart and brain when the body is stressed which correlates with illness severity
PT reflects
time to clot
aPTT is more sensitive to monitor
heparin therapy
CRP (C reactive protein)
measures inflammtion
Creatine Phosphokinase
(CPK or CK) ELEVATIONS
related to injury (inflammation) or stress on muscle tissue, the heart, or the brain
CPK is released into the bloodstream when
muscles are damaged
- MI
Inflammation activates
macrophages, neutrophils, platelets to the area which causes the endothelium (lining of the vessels) to release cytokines which activate the inflammatory pathways
Neutrophils
50-70%
- first responders
- fight injury/infection
Bands
< 10%
- Babies
- immature neutrophils
- if increase, then very sick and has been sick for a while
Eosinophils
1-5%
- parasite fighters
Basophils
1%
- non-specific immune response (asthma)
- release histamines
Lymphocytes
20-40%
- B and T cells
- humoral immunity (antibodies against specific antigens)
Monocytes
2-8%
- migrate to tissues and clean up dead cells
Mast Cells
- immune cells
- connective tissue cells that contain histamine
If bands are elevated in a serum blood draw, we call this
a shift to the left
- infection
- inflammation
- release WBCs before they are fully mature
Inflammation Patho
1) Tissue injury
2)
- Capillary widening = increased blood flow
- Increased permeability = fluid release into tissues
- attraction of leukocytes = extravasation of leukocytes to site of injury
- systemic reaction = fever and proliferation of leukocytes
3) Heat, redness, swelling, tenderness, and pain
SIRS patho
1) Chemical messengers release widespread histamine
2) Widespread separation of endothelial cells = vasodilation
3) Increased blood flow = need for greater CO = TACHYCARDIA
4) increased need for O2 = TACHYPNEA = HYPOCAPNIA
5) LEUKOCYTOSIS initially and then as the WBCs are decreased = LEUKOPENIA = increased production = increased immature WBCs in blood (bands) = shift to the left
6) immune response stimulated = “thermostat” of hypothalamus altered = HYPERTHERMIA(Proper response) or HYPOTHERMIA (Improper response)
What type of concepts happen in SIRS?
Oxygenation - disrupted gas exchange
Perfusion - vasoconstriction/dilation = Tachycardia/Tachypnea/Hypocapnia
Immunity - leukocytosis/leukopenia
Thermoregulation = high or low
SIRS
Systemic inflammatory response syndrome
SIRS caused by
stressors that are either infectious or noninfectious that cause acute inflammation
SIRS defined by the presence of 2 or more of the following:
- T > 100.5 º F (38º C) or < 96.8º F (36º C)
- HR > 90
- RR > 20 or PaCO2 < 32
- WBC >12000 or <4000 or > 10% immature bands
Causes of SIRS
infection/sepsis, trauma, pancreatitis, burns, embolism, burns, shock states, distal perfusion deficits
The cytokine release (endotoxins) leads to
destruction rather than protection.
SIRS Nursing Mgmt
- maintain tissue oxygenation
Monitor labs
Hemoglobin >7
Sleep
Maintain room to encourage sleep
Administer sedation as ordered
cluster care and facilitate rest environment
SIRS Nursing Mgmt
prevent and tx infection
Advocate for removal of lines ASAP
Urinary catheters
CVL
SIRS Nursing Mgmt
- mobility
Encourage mobility
Active ROM (Walking)
Passive ROM
if tolerated
SIRS Nursing Mgmt
- nutrition and metabolic support
Start within 24 hours of admission
Enteral feeding best
Tube feedings (NGT, OGT)
Parenteral (IV) may be needed if enteral contraindicated – PEG, TPN
SIRS Tx
id and tx the primary cause
infection control (antibiotics, antivirals, antifungals)
inflammatory control
glucose control
If the cause is infectious, treat with
Bacterial, viral, fungal
If the cause is non-infectious, treat with
control s/s
Dehydration tx
crystalloids IV fluids
DM tx
control BS
RA tx
methotrexate to lower immunity
Lupus tx
control inflammation
Narrow-spectrum antibiotics
vancomycin
Broad-spectrum antibiotics
- levofloxacin, piperacillin/tazobactam (zocen), ceftriaxone, meropenem, cefepime
Inflammatory control
Glucocorticoids: hydrocortisone, dexamethasone, methylprednisolone, prednisone
Tylenol
Glucose control
maintain <180 mg/dL – insulin scheduled or drip
Antivirals
oseltamivir (Tamiflu), interferon, acyclovir
Antifungals
amphotericin, nystatin
Is sepsis contagious?
no
- blood infection
Risk Factors to sepsis
Invasive devices/lines
Extremes of age (elderly/very young)
Malignancies
Burns
AIDS
Diabetes
Substance abuse
Wounds
Immunosuppressive therapy
Inflammation and coagulation linked in Sepsis patho
Inflammation > Coagulation pathways forms thrombin (clots) > tiny clots (microthrombi) > blocks blood flow to organs > hypoxia or hypoperfusion to organs>eventually fibrinolysis occurs (breakdown of clots) but can use up all fibrin available, so they have clots all over.
Infection + change in
Sepsis-related
Organ
Failure
Assessment
> 2 systems (cardiac, respiratory, neuro, kidney, liver, hematologic)