Why hco3 can be low
Carbon Dioxide and water
H2CO3 ( H+ + HCO3-Besides H+ the other product of this break-up is the negatively charged bicarbonate ion, HCO3-. This latter ion can also behave as an acid (an even weaker acid than H2CO3), releasing a second H+ according to . HCO3- ( H+ + CO32-where CO32- is the abbreviation for the carbonate ion.
[DOC File]Carbondioxide in water equilibrium - THUIS EXPERIMENTEREN
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The electro neutrality equation: 2[CO32-] + [HCO3-] + y = x. We now have 5 equations and 5 unknowns. From the equilibrium constants we derive and . Substituting these into the steuchiometric relation we derive: These equations can be used to calculate in which pH area which CO2 species dominates as can be seen in Figure 2: pH and CO2 species.
[DOC File]Disorders of electrolytes and water and acid–base balances
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Therefore, in simple metabolic acidosis, one would expect to find a low pH, a low plasma HCO3 - concentration, and a reduction in PCO2 after partial respiratory compensation. Respiratory alkalosis is an acid–base imbalance where the PCO2 is less than 35 mm Hg and the pH is greater than 7.45. Basically, the pH is increased and the CO2 is ...
[DOC File]Arterial Blood Gasses
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HCO3- + H+ ( H2CO3 ( CO2 + H2O. The CO2 can then be excreted by breathing (see below). The . HCO3- level in blood is normally between 22 and 27. If the body becomes more acid, HCO3- levels fall as HCO3- ions bind to hydrogen, and breathing increases, to reduce levels of CO2. Conversely, as the pH rises, HCO3- levels rise.
[DOC File]Fluid and Electrolyte Therapy in Children
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The blood HCO3 concentration needed to achieve this pH rarely exceeds 15 mEq/L if patient is capable of maintaining pCO2 < 35 mmHg. (See acid-base nomogram). Bicarbonate deficit = (15 – plasma [HCO3]) x Wt (kg) x 0.3. Note that bicarbonate given IV distributes acutely in only about ½ the total body water (TBW = Wt (kg) x 0.6).
[DOC File]Answer Guide for Medical Nutrition Therapy: A Case Study ...
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pO2 60- Still a bit low, but getting closer normal range. HCO3- 32- Still a little high, but getting closer to normal range. c. On 3/30, after the enteral feeding was resumed, his ABGs were as follows: pH 7.22, pCO2 66, pO2 57, CO2 36, HCO3- 37. In addition, indirect calorimetry indicated an RQ of 0.95 and his measured energy intake was 1350 kcal.
[DOC File]Arterial Blood Gases:
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The renal Tm for HCO3- may be reset by all of the above, and by volume. Non-resorbable anions (e.g., penicillin, carbenicillin) take HCO3- with them. pCO2 secondary to alkalosis causes a TERTIARY renal HCO3- retention (up to 40% of the HCO3- in metabolic alkalosis may be secondary to this).
[DOC File]Answer Guide for Medical Nutrition Therapy: A Case Study ...
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His Hgb, Hct, pO2,pH, and lymphocytes were all also low, pCO2, CO2, HCO3 and Segs% is high. Bilirubin might be high because of the lack of O2 to the RBCs. The LDL/HDL could be high do to the amount of eggs eaten, HDL being low and LDL high due to high fat intake or problems metabolizing fats. the Hbg and Hct could be low due to lack of protein ...
[DOC File]ABG Analysis Handout and Questions
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HCO3 =45. Why is the K so low? Case #9. EMS called for 38yo male increasingly agitated and incoherent . paramedics noted he appeared "drunk" but normal vital signs and 02 Sats . BP 110/70, HR 72, T 36°C, RR 24, Sat 97% RA. Thirty minutes later: GCS fell to 9 (E2/M4/V3) RR ↑ 30 breaths/min.
[DOC File]JEPonline
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This commentary provides explanation for why the pK’ of carbonic acid (H2CO3) is so low, yet bicarbonate (HCO3-) (pK’=10.2) can function as the body’s main blood buffer within the range of pH from 7.2 to 7.4. In addition, clarification is given for why citrate ingestion has a blood alkalizing effect.
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