PP - FLUID BALANCE - GADDIS - Jan 17 Flashcards
BODY FLUID FUNCTION (8)
• MAINTAINS BLOOD VOLUME
• REGULATES BODY TEMP
• TRANSPORTS MATERIAL TO AND FROM CELLS
• AQUEOUS MEDIUM FOR CELLULAR METABOLISM
• ASSISTS DIGESTION OF FOOD THROUGH HYDROLYSIS
• SOLVENT - SOLUTES ARE AVAILABLE FOR CELL FUNCTION
• SERVES AS MEDIUM FOR THE EXCRETION OF WASTE
• BODY FLUIDS ARE IN CONSTANT MOTION, MAINTAINING LIVING CONDITIONS FOR BODY CELLS
BODY COMPOSITION
Infants
Adults
Older Adults
Infants: 70 - 80 % Water / 20 - 30 % Solids
Adults: 50 - 60 % Water / 40 - 50 % Solids
Older Adults: 45 - 55 % Water / 45 - 55 % Solids
THE AMOUNT OF FLUID IN THE BODY IS AFFECTED BY SEVERAL THINGS
Age
Gender
Obesity
How does age effect the amount of fluid in the body
• AS WE AGE OUR MUSCLE MASS DECLINES AND THE PROPORTION OF FAT CELLS WITHIN THE BODY INCREASES
MUSCLE CELLS HAS A HIGHER CONTENT OF FLUID THAN
FAT CELLS
How does gender effect the amount of fluid in the body
WOMEN TYPICALLY HAVE MORE FAT CELLS THAN MEN
Which patients can be expected to dehydrate most quickly
Preemies / newborns / older adults
Especially older obese women
Preemies and newborns can dehydrate quickly or this could happen quickly as well
Overhydration
BODY FLUID COMPARTMENTS
Intracellular
Extracellular
INTRACELLULAR
INSIDE THE CELLS
EXTRACELLULAR
OUTSIDE THE CELLS
WHAT IS FUNCTION OF ECF
TRANSPORTS NUTRIENTS TO THE CELL AND
CARRIES WASTE PRODUCTS AWAY FROM THE CELLS 
HOW DOES ECF TRANSPORT NUTRIENTS / WASTES TO / FROM CELLS
BY MEANS OF THE CAPILLARY BED.
ECF (EXTRACELLULAR FLUID) FURTHER DIVIDED (3)
• INTERSTITIAL
• INTRAVASCULAR
• TRANSCELLULAR
INTERSTITIAL
• SURROUNDS EACH CELL OF THE BODY, EVEN BONE CELLS
• INTRAVASCULAR
• SURROUNDS THE CELLS OF THE BLOOD – MOST OF THE BLOOD VOLUME
• TRANS CELLULAR FLUID ENCLOSED BY
ENDOTHELIAL MEMBRANE
TRANS CELLULAR INCLUDES (9)
• CEREBROSPINAL
• PERICARDIAL
• PANCREATIC
• PLEURAL
• INTRAOCULAR
• BILIARY
• PERITONEAL
• SYNOVIAL FLUIDS • BOWEL MUCUS
WHICH FLUID IS GENERALLY NOT SUBJECTED TO GAINS AND LOSSES
TRANSCELLULAR
THIRD SPACE SYNDROME
FLUID SHIFTS FROM THE VASCULAR SPACE INTO AN AREA WHERE IT IS NOT READILY ACCESSIBLE AS EXTRACELLULAR FLUID
EX’S OF THIRD SPACE SYNDROME
• ASCITES
• HYDROCEPHALUS
• PLEURALEFFUSIONS
• PERICARDIAL TRANSCELLULAR EFFUSIONS ???
HYDROSTATIC PRESSURE
HYDROSTATIC PRESSURE
OSMOTIC PRESSURE
PRESSURE BY SOLUTES IN SOLUTION
ONCOTIC PRESSURE
• “COLLOID PRESSURE”
• PRESSURE DUE TO ALBUMIN IN BLOOD
OSMOLALITY
CONCENTRATION OF SOLUTES/KG SOLUTION
OSMOLARITY
NUMBER OF OSMOLES OF SOLUTE PER LITER OF SOLUTION
HYDROSTATIC PRESSURE SYMBOLIZES THE
PUSHING OUTWARD OF HYDROSTATIC PRESSURE PUSHING H2O FROM ECF (CAPILLARY) INTO ICF
OSMOTIC PRESSURE
PULLING FORCE OF OSMOTIC (ONCOTIC) PRESSURE CREATED BY SOLUTES (ALBUMIN), WHICH FAVORS FLUID MOVEMENT FROM ICF INTO ECF (CAPILLARY)
STARLING LAW OF CAPILLARIES EXPLAINS THE MOVEMENT OF
FLUID THAT OCCURS AT CAPILLARY BEDS
FLUID THAT OCCURS AT CAPILLARY BEDS OUTCOME OF 2 MAJOR OPPOSING FORCES:
- HYDROSTATIC PRESSURE
- OSMOTIC PRESSURE
ALTERATIONS IN FORCES CAN LEAD TO
EDEMA
EDEMA (2) WAYS
- INCREASED BLOOD VOLUME = INCREASED HYDROSTATIC PRESSURE
- LOWER ALBUMIN = REDUCED OSMOTIC PRESSURE
- INCREASED BLOOD VOLUME =
INCREASED HYDROSTATIC PRESSURE
- LOWER ALBUMIN =
REDUCED OSMOTIC PRESSURE
NORMAL PLASMA OSMOLALITY ~
290 MOSM
MOSM means…
OSMORECEPTORS
* LOCATED IN
HYPOTHALAMUS
OSMORECEPTORS
* LOCATED IN HYPOTHALAMUS AND STIMULATED BY
INCREASED PLASMA CONCENTRATION
THIRST MECHANISM AND ANTIDIURETIC HORMONE (ADH) RELEASE INITIATED BY
OSMORECEPTORS
ADH (ALSO KNOWN AS
VASOPRESSIN
ADH (ALSO KNOWN AS VASOPRESSIN)
* SYNTHESIZED BY
HYPOTHALAMUS
ADH (ALSO KNOWN AS VASOPRESSIN)
* RELEASED FROM
POSTERIOR PITUITARY
ADH (ALSO KNOWN AS VASOPRESSIN)
* STIMULATES
KIDNEY NEPHRON TO REABSORB MORE WATER
RENIN RELEASED FROM
KIDNEYS
ANGIOTENSIN I CONVERTED TO
ANGIOTENSIN II
RENIN RELEASED FROM KIDNEYS
CONVERTS
ANGIOTENSINOGEN (FROM LIVER) TO ANGIOTENSIN I
WHERE IS ANGI I CONVERTED TO ANGI II AND BY WHAT
IN LUNGS BY ANGIOTENSIN-CONVERTING ENZYME (ACE)
ANGIOTENSINOGEN IS FROM
LIVER
ANGIOTENSIN II IS A
VASOCONSTRICTOR
ANGIOTENSIN II (VASOCONSTRICTOR)
ACTIVATES
ADRENAL CORTEX
ANGIOTENSIN II (VASOCONSTRICTOR)
ACTIVATES ADRENAL CORTEX TO RELEASE WHAT
ALDOSTERONE
ALDOSTERONE INCREASES
SODIUM AND WATER REABSORPTION AND POTASSIUM SECRETION BY KIDNEYS
RAAS
RENIN-ANGIOTENSIN- ALDOSTERONE SYSTEM
WHEN DECREASED CIRCULATION / DECREASED BP IS SENSED BY KIDNEYS WHAT HAPPENS
KIDNEYS SECRETES RENIN
WHEN KIDNEYS SECRETE RENIN, IT STIMULATES
THE LIVER
ANGIOTENSIN II STIMULATES WHICH GLAND
OUTER COTEX OF ADRENAL GLAND
WHAT DOES OUTER CORTEX OF ADRENAL GLAND RELEASE
ALDOSTERONE
WHAT EFFECT DIOES ALDOSTERONE HAVE ON THE BODY
INCREASES SODIUM & WATER REABSORPTION INTO BLOODSTREAM
CAUSES POTASSIUM SECRETION INTO URINE
WHAT IS THE RAAS NET EFFECT
INCREASED BLOOD VOLUME & INCREASED BP
ANGIOTENSIN STIMULATES OUTER CORTEX OF ADRENAL GLAND BUT ALSO STIMULATES
PERIPHERAL ARTERIAL VASOCONSTRICTION WHICH THEN RAISES BP
NATRIURESIS
EXCRETION OF LARGE AMOUNTS OF SODIUM AND WATER
THREE PEPTIDES PROMOTE NATRIURESIS
- ATRIAL NATRIURETIC PEPTIDE (ANP)
- BRAIN NATRIURETIC PEPTIDE (BNP)
- C-TYPE NATRIURETIC PEPTIDE (CNP)
ATRIAL NATRIURETIC PEPTIDE (ANP)
- ATRIAL CELLS WHEN ATRIA STRETCHED
RAIN NATRIURETIC PEPTIDE (BNP)
- HEART VENTRICLES AND TO LESSER EXTENT, THE BRAIN
C-TYPE NATRIURETIC PEPTIDE (CNP)
- ENDOTHELIAL CELLS OF ARTERIES AND
VENTRICULAR CELLS
ASSESSMENT OF FLUID STATUS
- DAILY WEIGHT
- 24-HOUR I & O (INPUT AND OUTPUT)
- VITAL SIGNS SUCH AS HEART RATE AND BLOOD PRESSURE
- ORTHOSTATIC HYPOTENSION MAY DEVELOP IN DEHYDRATION
- ASSESS STATUS OF MUCOUS MEMBRANES, SKIN TURGOR, URINE OUTPUT, EDEMA
1 OUNCE OF FLUID EQUALS
30 mL
- 24-HOUR I & O (INPUT AND OUTPUT)
- RECORD IN
mL
ORTHOSTATIC HYPOTENSION MAY DEVELOP IN
DEHYDRATION
ADD UP THE FOLLOWING INTAKE IN MILLILITERS
* 8 OZ COFFEE
* 6 OZ JUICE
* 1⁄2 CUP JELLO
540 mL
TO MAINTAIN, THE GAINS & LOSSES MUST
EQUAL
SEQUESTERED FLUIDS
FLUID ACCUMULATES IN BODY CAVITIES NORMALLY FREE OF FLUIDS
SEQUESTERED FLUIDS
* FLUID ACCUMULATES IN BODY CAVITIES NORMALLY FREE OF FLUIDS
* AKA:
THIRD-SPACE ACCUMULATION OR
THIRD-SPACING PERICARDIAL SAC,
PERITONEAL CAVITY, AND
PLEURAL SPACE
SEQUESTERED FLUIDS ALSO CALLED
FLUID CALLED “EFFUSION” doublecheck
FLUID CALLED “EFFUSION” (2) TYPES
- TRANSUDATE: SEROUS FILTRATE OF BLOOD
- EXUDATE: CONTAINS BLOOD, LYMPH, PROTEINS, PATHOGENS, INFLAMMATORY CELLS
Transudative pleural effusion is caused by
fluid leaking into the pleural space. This is from increased pressure in the blood vessels or a low blood protein count. Heart failure is the most common cause
Transudative pleural effusion is caused by fluid leaking into the pleural space. This is from
increased pressure in the blood vessels or a low blood protein count. Heart failure is the most common cause
 Exudative effusion is caused by
blocked blood vessels or lymph vessels, inflammation, infection, lung injury, or tumors
MAINTAINING THE FLUID BALANCE IN THE BODY IS A BALANCING ACT. WHICH ORGANS ALL WORK o TOGETHER TO MAINTAIN FLUID BALANCE.
HEART, KIDNEYS LIVER, ADRENAL AND PITUITARY GLANDS
YOU GAIN AND LOSE ON A
DAILY BASIS
THIS DELICATE FLUID BALANCING ACT IS AFFECTED BY
- FLUID VOLUME
- DISTRIBUTION OF THE FLUIDS IN THE BODY
- CONCENTRATION OF SOLUTES IN THE FLUID
HOW MUCH WATER IS GAINED ON AVG EACH DAY THROUGH FOOD & DRINK
2.2 L
HOW MUCH WATER IS GAINED ON AVG EACH DAY THROUGH METABOLISM
0.3 L
TOTAL DAILY INTAKE H2O iS APPROX
2.5 L / DAY
(4) WAYS H2O IS LOST
SKIN / LUNGS / URINE / FECES
HOW MUCH WATER IS LOST THROUGH SKIN & LUNGS / DAY
0.9 L / DAY
WATER LOST EACH DAY THROUGH SKIN & LUNGS IS WHAT TYPE OF LOSS
INSENSIBLE LOSSES
HOW MUCH WATER IS LOST THROUGH URINE / DAY
1.5 L
HOW MUCH WATER IS LOST THROUGH FECES / DAY
0.1 L / DAY
(2) TYPES WATER LOSSES
- SENSIBLE OR MEASURABLE
- INSENSIBLE OR NOT MEASURABLE
- SENSIBLE LOSSES ARE
MEASURABLE
INSENSIBLE LOSSES ARE
NOT MEASURABLE
INSENSIBLE LOSSES OCCUR THROUGH
EVAPORATION
EVAPORATION HAPPENS THROUGH
- SKIN
- LUNGS
WHAT FACTORS CAN INCREASES THE INSENSIBLE LOSS
- FEVER
- RAPID AND/OR DEEP RESPIRATIONS (PAIN, FEVER, ANXIETY, DKA, ETC.)
ONE REASON BABIES CAN BECOME DEHYDRATED OR OVER HYDRATED QUICKLY
BODY SURFACE AREA IS GREATER IN AN INFANT THAT AN ADULT RELATIVE TO WEIGHT
AN EXCHANGE OF FLUID CONTINUOUSLY OCCURS AMONG THE
INTRACELLULAR, PLASMA, AND INTERSTITIAL COMPARTMENTS
OF THESE THREE SPACES, INTRACELLULAR, PLASMA, AND INTERSTITIAL ONLY THE ——- IS
Plasma is DIRECTLY INFLUENCED BY THE INTAKE OR ELIMINATION OF FLUID FROM THE BODY.
CHANGES IN THE INTRACELLULAR AND INTERSTITIAL FLUID COMPARTMENTS OCCUR IN RESPONSE TO
CHANGES IN THE VOLUME OR CONCENTRATION OF THE PLASMA
NORMAL URINARY OUTPUT
* AT LEAST
400 ML
- AT LEAST 400 ML OF URINE MUST BE PRODUCED TO EXCRETE THE
Daily load of metabolic waste
URINARY OUTPUT IDEAL MEASUREMENT:
1ML/KG/HR
OLIGURIA
LESS THAN 400ML OF URINE IN 24 HOURS
OLIGURIA:
* SIGNALS RETENTION OF
METABOLIC WASTES *5
AT RISK MEASUREMENT:
0.5ML/KG/HOUR
- ANURIA
- LESS THAN 100 ML URINE IN 24 HOURS
- POLYURIA
- ABNORMALLY LARGE AMOUNT OF URINARY OUTPUT
- FLUID IMBALANCES CAN BE IDENTIFIED EARLY BY
ASSESSING YOUR PATIENT BEFORE & DURING IV THERAPY.
- COMPARE AND CONTRAST A PATIENT WHO IS HYPOVOLEMIC AND HYPERVOLEMIC
- CHOSE 5 ASSESSMENT RESULTS
1. * worksheet on this
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* EXAMPLE: HEMATOCRIT (% OF HGB IN PLASMA) NORMAL IS 3 TIMES THE HEMOGLOBIN IN A NORMOVOLEMIC PATIENT
* IF INCREASED IT MEANS LESS VOLUME (PLASMA), IF DECREASED IT MEANS MORE VOLUME (PLASMA)
FLUID IMBALANCES – ASSESSMENT DEFICIT FINDINGS (15)
WIDS MFID FTID PID
WEIGHT LOSS
INCREASED HEMATOCRIT
DIMINISHED BLOOD PRESSURE
SUNKEN EYEYES
MENTAL STATUS CHANGES
FAST, THREADY PULSE
INCREASED SERUM ELECTROLYE LRVELS
DRCREASED URINE OUTPUT
FURROWS IN TONGUE
THIRST
INCREASED BUN
DEVREASED SALIVATION
POOR SKIN TURGOR (NOT RELIABLE - ELDERLY)
INCREASED SERUM OSMOLARITY
DRY CRACKED LIPS
DEHYDRATION
STATE OF DIMINISHED WATER VOLUME IN BODY
STATE OF DIMINISHED WATER VOLUME IN BODY IS ALSO KNOWN AS
HYPOVOLEMIA
IN DEHYDRATION - FLUID MOVES FROM
ICF CAUSING CELLS TO SHRINK (CELLULAR DEHYDRATION)
RESPONSE TO DEHYDRATION
- OSMORECEPTORS STIMULATE THIRST, ADH RELEASE
- VASOCONSTRICTION AND INCREASED HR
- RAAS ACTIVATED
DECREASED CIRCULATING BLOOD VOLUME LEADS TO
TACHYCARDIA AND HYPOTENSION
paste clarifier
DEHYDRATION CAN BE CAUSED BY
- REDUCED FLUID INTAKE
- REDUCED ADH OR KIDNEYS NOT RESPONSIVE TO ADH
- BURNS, FEVER, PERSPIRATION
- OSMOTIC DIURESIS, AS OCCURS WITH ELEVATED BLOOD GLUCOSE LEVELS
- HYPERNATiREMIA
DEHYDRATION STIMULATES WHAT (4) THINGS
SIMULATION OSMORECEPTORS IN BRAIN
STIMULATION PERIPHERAL BARORECEPTORS IN BLOOD VESSELS
STIMULATES KIDNEY TO RELEASE RENIN
STIMULATION OF OSMORECEPTORS
STIMULATION OF OSMORECEPTORS IN BLOOD VESSELS LEADS TO
STIMULATION OF THIRST CENTER IN HYPOTHALAMUS
STIMULATION OF BARORECEPTORS IN BLOOD VESSELS LEADS TOPERIPHERAL
SNA STIMULATING HEART TO BEAT FASTER
VASOCONSTRICTION OF BLOOD VESSELS
STIMULATION OF KIDNEY TO SECRETE RENIN LEADS TO
RAAS DIUBLE CHECK THIS
RAAS LEADS TO
RAISES BP
RAISES BLOOD VOLUME
DEHYDRATION STIMULATES OSMORECEPTORS THAT THEN STIMULATES WHAT
POSTERIOR PITUITARY GLAND OF BRAIN
WHEN POSTERIOR PITUITARY IS STIMULATED WHAT HORMONE IS RELEASED
ADH
ADH HAS WHAT EFFECT ON THE KIDNEYS
INCREASES WATER REABSORPTION AT NEPHRON OF KIDNEY
FLUID IMBALANCES – ASSESSMENT EXCESS FINDINGS (14)
- WEIGHT GAIN
- ELEVATED BLOOD PRESSURE
- JUGULAR VEIN DISTENTION
- DYSPNEA
- BOUNDING PULSE
- PUFFY EYELIDS
- MOIST CRACKLES OR RHONCHI
- EDEMA – GENERALIZED OR
- PERIORBITAL EDEMA
- DECREASED HEMATOCRIT
- DECREASED SERUM ELECTROLYTE LEVELS
- DECREASED BUN
- REDUCED SERUM OSMOLARITY
- SLOW EMPTYING OF HAND VEINS WHEN THE ARM IS RAISED
FLUID VOLUME OVERLOAD
BLOODSTREAM HAS EXCESSIVE AMOUNT OF WATER
ONE OF MOST COMMON CAUSES FLUID VOLUME OVERLOAD
IS HEART FAILURE (THROUGH ACTIVATION OF RAAS DUE TO LOW PERFUSION OF KIDNEY)
EDEMA DEVELOPS DUE TO
HIGH HYDROSTATIC FORCES
Transudative pleural effusion is caused by fluid leaking into the pleural space. This is from
increased pressure in the blood vessels or a low blood protein count. Heart failure is the most common cause
How Is albumin (the most abundant protein in the body) related to edema
Proteins in bloodtend to pullwater into blood vessels (acting like a “water magnet”). When level of protein in blood is low, water may leave blood vessels and collect in tissues.
Water in the tissues is called
“edema”. Critically ill patients develop edema for many reasons. Alow albumin level can cause edema or increase the amount of edema from other causes
EDEMA - * EXCESS OF FLUID IN THE
ISF AND ICF COMPARTMENTS
PRIMARY CAUSES EDEMA
ELEVATED HYDROSTATIC PRESSURE
DECREASED OSMOTIC FORCES IN BLOOD
ALTERATIONS IN CAPILLARY PERMEABILITY
SODIUM RETENTION
ELEVATED HYDROSTATIC PRESSURE Leads to
INCREASED ECF VOLUME AS OCCURS IN HEART FAILURE
DECREASED OSMOTIC FORCES IN BLOOD Leads to
HYPOALBUMINEMIA
HYPOALBUMINEMIA
LIVER FAILURE, PROTEIN MALNUTRITION
SODIUM RETENTION CAN BE FROM
- DUE TO ILLNESS OR CONSUMPTION OF SALTY FOODS
- PULLS FLUID FROM ICF INTO ECF
ALTERATIONS IN CAPILLARY PERMEABILITY From
- HISTAMINE
- INFLAMMATION
DEPENDENT EDEMA
- LOWER EXTREMITIES
- VENOUS BLOOD COLLECTS
- FLUID ACCUMULATES IN
FEET AND ANKLES - TEDS: THROMBOEMBOLIC
PITTING EDEMA
OCCURS WHEN PRESSURE APPLIED TO SMALL AREA
* INDENTATION PERSISTS AFTER RELEASE OF PRESSURE
* SEVERITY: +1, +2, +3
ASSESS YOUR PATIENT FOR DISEASE OR DISORDERS THAT MAY CAUSE DISTURBANCES IN
FLUID AND ELECTROLYTE BALANCE
Ex’s of DISEASE OR DISORDERS THAT MAY CAUSE DISTURBANCES IN FLUID AND ELECTROLYTE BALANCE
- ULCERATIVE COLITIS
- DIABETES MELLITUS
- RENAL FAILURE
IDENTIFY MEDICATIONS AND/OR THERAPIES THAT COULD CAUSE DISTURBANCES IN
FLUID AND ELECTROLYTE BALANCE
Ex’s of MEDICATIONS AND/OR THERAPIES THAT COULD CAUSE DISTURBANCES IN FLUID AND ELECTROLYTE BALANCE
- DIURETICS
- NG SUCTION
TO CORRECT THE IMBALANCE THERE ARE A FEW THINGS WE NEED TO REMEMBER:
WHAT ROLE DOES THE IV SOLUTION PLAY?
WHAT EXACTLY IS “OSMOLARITY”?
WHAT DOES A “LOWER SERUM OSMOLARITY” SUGGEST?
WHAT DOES A “HIGHER SERUM OSMOLARITY” SUGGEST?
WHAT ROLE DOES THE IV SOLUTION PLAY?
- THE EFFECT THE SOLUTION HAS ON FLUID COMPARTMENTS DEPENDS ON THE SOLUTION’S OSMOLARITY COMPARED WITH THE PATIENT’S SERUM OSMOLARITY
WHAT EXACTLY IS “OSMOLARITY”?
- THE CONCENTRATION OF A SOLUTION
- WHAT DOES A “LOWER SERUM OSMOLARITY” SUGGEST?
- SUGGESTS FLUID OVERLOAD
- WHAT DOES A “HIGHER SERUM OSMOLARITY” SUGGEST?
- SUGGESTS HEMOCONCENTRATION OR DEHYDRATION
OSMOSIS
THE PULLING OF WATER THROUGH A SEMI-PERMEABLE MEMBRANE FROM AREA OF LOWER CONCENTRATION TO AREA OF HIGHER CONCENTRATION IN ORDER TO EQUALIZE CONCENTRATION ON BOTH SIDES.
DIFFUSION
- MOVEMENT OF PARTICLES IN A SOLUTION FROM HIGHER CONCENTRATION TO LOWER IN ORDER TO EQUALIZE.
DECREASED URINE OUTPUT NOT BALANCED BY DECREASED INTAKE OF SODIUM AND WATER
- OLIGURIA(ACUTEKIDNEYINJURY, ACUTE GLOMERULONEPHRITIS, END STAGERENALDISEASE)
- ALDOSTERONEEXCESS(CIRRHOSIS, CHRONIC HEART FAILURE, PRIMARY ALDOSTERONISM)
- HIGHLEVELSOFGLUCOCORTICOIDS (CORTICOSTEROID THERAPY, CUSHING DISEASE)
CAUSES THAT DISRUPT FLUID BALANCE
ECV DEFICIT (TOO LITTLE EXTRACELLULAR VOLUME)
INCREASED OUTPUT NOT BALANCED BY INCREASED INTAKE OF SODIUM AND WATER
RAPID FLUID SHIFT FROM ECV INTO THIRD SPACE
ECV EXCESS (TO MUCH EXTRACELLULAR VOLUME)
DECREASED URINE OUTPUT NOT BALANCED BY DECREASED INTAKE OF SODIUM AND WATER
INCREASED OUTPUT NOT BALANCED BY INCREASED INTAKE OF WATER
DECREASED OUTPUT NOT BALANCED BY DECREASED INTAKE OF WATER
ECV DEFICIT (TOO LITTLE EXTRACELLULAR VOLUME)
NORMALOUTPUT BUTDEFICIENT - SODIUM AND WATER
INCREASED OUTPUT NOT BALANCED BY INCREASED INTAKE OF SODIUM AND WATER
- VOMITING
- ACUTE OR CHRONIC DIARRHEA
- DRAINING GI FISTULAS, GASTRIC SUCTION, INTESTINAL DECOMPRESSION
- HEMORRHAGE OR BURNS
OVERUSE OF DIURETICS
RAPID FLUID SHIFT FROM ECV INTO THIRD SPACE
- ACUTE INTESTINAL OBSTRUCTION
- ASCITES THAT DEVELOPS RAPIDLY
ECV EXCESS (TO MUCH EXTRACELLULAR VOLUME)
OUTPUTLESSTHANEXCESSIVEOR TOORAPIDINTAKEOFSODIUMAND WATER
* EXCESSIVEIVINFUSIONOFSODIUM CONTAINING ISOTONIC SOLUTIONS
* HIGHORALINTAKEOFSALTYFOODS AND WATER WITH RENAL RETENTION OF SODIUM AND WATER
* OVERUSEOFDIURETICS
DECREASED URINE OUTPUT NOT BALANCED BY DECREASED INTAKE OF SODIUM AND WATER
- OLIGURIA(ACUTEKIDNEYINJURY, ACUTE GLOMERULONEPHRITIS, END STAGERENALDISEASE)
- ALDOSTERONEEXCESS(CIRRHOSIS, CHRONIC HEART FAILURE, PRIMARY ALDOSTERONISM)
- HIGHLEVELSOFGLUCOCORTICOIDS (CORTICOSTEROID THERAPY, CUSHING DISEASE)
INCREASED OUTPUT NOT BALANCED BY INCREASED INTAKE OF WATER
- VOMITING OR DIARRHEA WITH REPLACEMENT OF SODIUM BUT NOT ENOUGH WATER
- DIABETESINSIPIDUS(LACKOF ANTIDIURETIC HORMONE
DECREASED OUTPUT NOT BALANCED BY DECREASED INTAKE OF WATER
- EXCESSIVE ANTIDIURETIC HORMONE
HYPONATREMIA (BODY FLUIDS TOO DILUTE: OSMOLALITY TOO LOW)
- OUTPUTLESSTHANEXCESSIVEOR TOO RAPID INTAKE OF WATER
- IVD5WINFUSIONWITHEXCESSRATE OR AMOUNT
- RAPID ORAL INGESTION OF MASSIVE AMOUNTS OF WATER (CHILD ABUSE, CLUB INITIATION, PSYCHIATRIC DISORDER)
- OVERUSE OF TAP WATER ENEMAS OR HYPOTONIC IRRIGATING SOLUTIONS
- MASSIVEREPLACEMENTOFWATER WITHOUT SODIUM DURING VOMITING
HYPERNATREMIA (BODY FLUIDS TOO CONCENTRATED: OSMOLALITY TOO HIGH)
- NORMALOUTPUTBUTDEFICIENT INTAKEOFWATER
- NO ACCESS TO WATER OR INABILITY TO RESPOND TO OR COMMUNICATE THIRST (APHASIA, COMA, INFANT)
- TUBEFEEDINGWITHOUTADDITIONAL WATER INTAKE)
WHEN THE SERUM OSMOLARITY INCREASES OR DECREASES, IV SOLUTIONS MAY BE ORDERED TO
HELP MAINTAIN OR RESTORE THE FLUID BALANCE
TONICITY
AMOUNT OF SOLUTES IN SOLUTION COMPARED WITH THE BLOOD STREAM
3 BASIC TYPES OF IV SOLUTIONS:
HYPERTONIC
HYPOTONIC
ISOTONIC
HYPERTONIC
MORE PARTICLES THAN BLOOD (LESS WATER)
HYPOTONIC
- FEWER PARTICLES THAN BLOOD (MORE WATER)
HYPERTONIC
- DRAWS FLUID INTO THE INTRAVASCULAR COMPARTMENT
FROM THE CELLS AND THE INTERSTITIAL COMPARTMENTS
- HYPOTONIC:
- CAUSES CELLS TO SWELL (IT SHIFTS THE FLUID OUT OF THE
INT RAVASCULAR COMPARTMENT)
- ISOTONIC:
- EXPANDS BLOOD VOLUME, PROVIDES NO FREE WATER
ABOUT HYPERTONIC:
SOLUTION OSMOLARITY IS HIGHER THAN
THE SERUM OSMOLARITY
WHEN HYPERTONIC SOLUTIONS ARE INFUSED, THE SOLUTE CONCENTRATION OF SERUM IS
INCREASED (↑SERUM OSMOLARITY)
WHEN HYPERTONIC SOLUTIONS ARE INFUSED OSMOSIS OCCURS DUE TO
THE ↑ IN SERUM OSMOLARITY, NOW HIGHER THAN THE INTERSTITIAL FLUID, TO MAINTAIN EQUAL CONCENTRATIONS ON EITHER SIDE
Hypertonic environment
The solute concentration is greater outside of the cell. The free water concentration is greater inside the cell. Free water flows out of the cell.
What happens when a cell is placed in a hypertonic environment?
Free water flows out of the cell
What is the indications hypertonic IV fluids?
POSTOPERATIVE PATIENTS BECAUSE OF SEVERAL BENEFICIAL EFFECTS, DUE TO THE SHIFT OF FLUID INTO THE BLOOD VESSELS.
How old is hypertonic IV fluid benefit postoperative patient .
REDUCES RISK OF EDEMA REGULATES URINE OUTPUT STABILIZES BLOOD PRESSURE
HYPERTONIC
NOTES OF CONCERN:
HYPERTONIC SOLUTIONS EXPAND INTRAVASCULAR COMPARTMENT,
HYPERTONIC SOLUTIONS PULL FLUID FROM THE INTRACELLULAR COMPARTMENTS,
PATIENTS WITH IMPAIRED HEART OR KIDNEY FUNCTION SHOULD NOT BE GIVEN HYPERTONIC SOLUTION
HYPERTONIC SOLUTIONS EXPAND INTRAVASCULAR COMPARTMENT, THEREFORE, MONITOR PATIENT CLOSELY FOR
HYPERVOLEMIA
HYPERTONIC SOLUTIONS PULL FLUID FROM THE INTRACELLULAR COMPARTMENTS, SO PATIENTS WITH CONDITIONS THAT CAUSE CELLULAR DEHYDRATION (E.G., DIABETIC KETOACIDOSIS) SHOULD.
NOT BE GIVEN HYPERTONIC SOLUTIONS
PATIENTS WITH IMPAIRED HEART OR KIDNEY FUNCTION SHOULD NOT BE GIVEN HYPERTONIC SOLUTION BECAUSE
SYSTEM CAN’T HANDLE THE EXTRA FLUID
Examples of Hypertonic solutions:
- DEXTROSE 5% IN HALF- NORMAL SALINE
- DEXTROSE 5% IN NORMAL SALINE
- DEXTROSE 5% IN LACTATED RINGER’S
- 3% SODIUM CHLORIDE (ICU/CCU)
- 25% ALBUMIN
- 7.5% SODIUM CHLORIDE (DIALYSIS)
- 3% SODIUM CHLORIDE
- 25% ALBUMIN
- 7.5% SODIUM CHLORIDE
When thinking about hypertonic solutions, think about large molecules in solutions like glucose
DRAWS FLUID FROM THE CELLS AND CAUSES THEM TO “SHRINK” OR ?? Something….
ABOUT HYPOTONIC:
- HAS A LOWER SOLUTE CONCENTRATION THAN SERUM
- FLUID SHIFTS OUT OF BLOOD VESSELS & INTO CELLS & INTERSTITIAL SPACES WHERE CONCENTRATION IS HIGHER
- HYDRATES THE CELLS WHILE REDUCING THE FLUID IN THE
46 ????
CIRCULATORY SYSTEM
HYPOTONIC ENVIRONMENT THE SOLUTE CONCENTRATION IS GREATER WHERE
INSIDE THE CELL. THE FREE WATER CONCENTRATION IS GREATER OUTSIDE CELL.
WHAT HAPPENS TO CELLS IN A HYPOTONIC ENVIRONMENT
FREE WATER FLOWS INTO CELLS
HYPOTONIC
INDICATIONS:
- WHEN DIURETIC THERAPY DEHYDRATES CELLS
- CELL DEHYDRATION DUE TO HYPERGLYCEMIC CONDITIONS SUCH AS DIABETIC KETOACIDOSIS (DKA) & HYPERGLYCEMIC HYPEROSMOLAR NONKETOTIC SYNDROME (HHNS). IN THESE CONDITIONS THE HIGH SERUM GLUCOSE LEVELS DRAW FLUID OUT OF THE CELLS.
- TO PROMOTE WASTE ELIMINATION THROUGH THE KIDNEYS
HIGH SERUM GLUCOSE LEVELS DOES WHAT TO CELLS
DRAW FLUID OUT OF THE CELLS.
EXAMPLES OF HYPOTONIC SOLUTIONS:
*0.5% SODIUM CHLORIDE
*0.33% SODIUM CHLORIDE
*0.25% SODIUM CHLORIDE
*DEXTROSE 2.5%
*DEXTROSE 5% IN WATER (TECHNICALLY
HYPOTONIC SOLUTIONS DO WHAT TO THE CELLS
“FLOOD THE CELLS
BECAUSE HYPOTONIC SOLUTIONS “FLOOD THE CELLS”, CERTAIN PATIENTS SHOULD
NOT RECEIVE THEM.
Which patient should not receive hypotonic IV fluids
PATIENTS WITH:
* CEREBRAL EDEMA OR INCREASED INTRACRANIAL PRESSURE,
PATIENTS AT RISK FOR THIRD-SPACE FLUID SHIFTS
* HYPOTENSION AS IT DEPLETES THE CIRCULATING VOLUME
Why should patients with cerebral edema or increased intracranial pressure not receive hypotonic IV solutions?
DUE TO THE RISK OF CAUSING FURTHER EDEMA AND TISSUE DAMAGE
- PATIENTS AT RISK FOR THIRD-SPACE FLUID SHIFTS
ARE THOSE WITH
- BURN PATIENTS
- TRAUMA PATIENTS
- PATIENTS WITH LOW SERUM PROTEIN LEVELS FROM MALNUTRITION OR LIVER DISEASE
ABOUT ISOTONIC:
- HAS SAME SOLUTE CONCENTRATION AS SERUM & OTHER BODY FLUIDS.
- WHEN INFUSED IT DOES NOT ALTER THE CONCENTRATION OF SERUM, WATER FLOWS IN AND OUT OF THE CELL AT AN EQUAL RATE.
- SOLUTION BASICALLY “STAYS PUT” WHERE IT’S INFUSED, INSIDE THE BLOOD VESSEL.
IN AN ISOTONIC ENVIRONMENT, WHAT HAPPENS TO CELLS
WATER FLOWS IN AND OUT OF CELL AT EQUAL RATE
IN ANN ISOTONIC ENVIRONMENT WHY DOES WATER FLOW IN AND OUT OF CELL AT AN EQUAL RATE
THE SOLUTE CONCENTRATION AND THE FREE WATER CONCENTRATION ARE THE SAME INSIDE AND OUTSIDE THE CELL
ISOTONIC INDICATIONS:
- MAINTENANCE OF INTRAVASCULAR VOLUME
- ACCOMPANIES BLOOD TRANSFUSIONS
- HYPOTENSION DUE TO HYPOVOLEMIA (REPLACEMENT OF INTRAVASCULAR VOLUME)
EXAMPLES ISOTONIC FLUIDS:.
- LACTATED RINGER’S/
- RINGER’S
- NORMAL SALINE
- NORMOSOL
- DEXTROSE 5% IN WATER (ACTUALLY ISOTONIC ONLY IN THE CONTAINER. WHEN ADMINISTERED, DEXTROSE IS QUICKLY METABOLIZED LEAVING ONLY WATER – A HYPOTONIC FLUID).
- 5% ALBUMIN
DEXTROSE 5% IN WATER IS ONLY ISOTONIC WHEN
IN THE CONTAINER..
What happens to dextrose?
WHEN ADMINISTERED, DEXTROSE IS QUICKLY METABOLLEAVING ONLY WATER – A HYPOTONIC FLUID)
ISOTONIC -
NOTES OF CONCERN:
- MONITOR PATIENT CLOSELY FOR FLUID OVERLOAD
- BECAUSE THE LIVER CONVERTS LACTAToE TO BICARBONATE, LACTATED RINGER’S SHOULD NOT BE GIVEN IF THE PATIENT’S BLOOD PH EXCEEDS 7.5
- AVOID GIVING D5W TO PATIENTS AT RISK FOR INTRACRANIAL PRESSURE
When giving isotonic fluids monitor patients closely for fluid overload due to
FLUIDS EXPANDING THE INTRAVASCULAR COMPARTMENT (ESPECIALLY PATIENTS WITH HYPERTENSION OR HEART FAILURE)
When giving isotonic fluids AVOID GIVING D5W TO PATIENTS AT RISK FOR INTRACRANIAL PRESSURE AS OT ACTS AS A
HYPOTONIC SOLUTION
WHAT SHOULD I SEE IF I GIVE MY PATIENT AN ISOTONIC SOLUTION?
- INCREASED UOP
- INCREASE IN BODY WEIGHT
- INCREASE IN BP OR MAP
- DECREASED PULSE
- IMPROVED SKIN TURGOR, MOIST MUCUS MEMBRANES
PREVENTION OF FLUID IMBALANCES THRU THE USE OF
- USE OF IV PUMPS
- USE OF BURETROL OR SYRINGE PUMP FOR PEDIATRIC PATIENTS
- MONITOR INTAKE AND OUTPUT
- MONITOR WEIGHT
- ASSESS LUNG SOUNDS, HEART TONES, PERIPHERAL
EDEMA - CONSIDER USE OF INTERMITTENT IV WHEN
55 ?????
IV SOLUTIONS FORMS
CRYSTALLOIDS
COLLOIDS
PREVENTION OF FLUID IMBALANCES THRU THE USE OF
- USE OF IV PUMPS
- USE OF BURETROL OR SYRINGE PUMP FOR PEDIATRIC PATIENTS
- MONITOR INTAKE AND OUTPUT
- MONITOR WEIGHT
- ASSESS LUNG SOUNDS, HEART TONES, PERIPHERAL
EDEMA - CONSIDER USE OF INTERMITTENT IV WHEN
55 ????? N
CRYSTALLOID IV SOLUTIONS
HYPOTONIC
ISOTONIC
HYPERTONIC
COLLOID IV SOLUTIONS
ALWAYS HYPERTONIC
COLLOID IV SOLUTIONS CONTAIN MOLECULES TO LATGE TO
PASS THROUGH THE CAPILLARY MEMBRANE
CRYSTALLOID SOLUTIONS MOVE HOW
FREELY BETWEEN THE CAPILLARY MEMBRANE
COLLOIDS CONTAIN
PROTEIN OR STARCH MOLECULES
IN COLLOIDS, THR PROTEIN OR STARCH MOLECULES REMAIN IN WHAT FORMATION
DISTRIBUTED IN THE EXTRACELLULAR SPACE AND DO NOT FORM A “TRUE” SOLUTION.
COLLOIDS HAVE WHAT EFFECT ON THE OSMOLARITY WITHIN TH PLASMA
INCREASE THE OSMOLARITY WITHIN THE PLASMA SPACE DRAWING FLUID TO INCREASE INTRAVASCULAR VOLUME
ONCE COLLOIDS ARE INUSED THEY REMAIN WHERE FOR SEVERAL DAYS
THEY REMAIN IN THE VASCULAR SPACE FOR SEVERAL DAYS.
COLLOIDS ALSO CALLED
PLASMA OR VOLUME EXPANDERS
WHITH COLLOIDS MONITOR FOR
OVERLOAD