Mrs. K.B. is age 64 and has been a patient of yours for many years. You are calling her today to tell her the results of her Pap test which was done last week during her routine annual checkup in your office. The test showed marked dysplasia of cervical cells but no sign of infection. Unfortunately, when you call, there is no answer.
Since you saw Mrs. K.B. last week she has had gastritis with severe vomiting for 3 days. She has a history of heart problems and is presently feeling dizzy and lethargic. Her eyes appear sunken, her mouth is dry, she walks unsteadily, and she complains of muscle aching, particularly in the abdomen, and she is concerned about her chronic back pain as well and how she is going to handle her pain if she can’t keep her medication down. She is thirsty but is unable to retain food or fluid. A neighbor has brought Mrs. K.B. to the hospital, where examination shows that her blood pressure is low, and her pulse and respirations are rapid. Laboratory tests demonstrate elevated hematocrit, hypernatremia, decreased serum bicarbonate, serum pH 7.35, and urine of high specific gravity. This case study illustrates a combination of fluid, electrolyte, and acid-base imbalances. Specific laboratory values are not given to focus on the basic concepts. For clarity, this case study is discussed in multiple parts. Further information about the specific problems involved is given in each part and is followed by a series of questions.
Part 1
Later in the afternoon, you receive a phone call from Mrs. K.B.’s daughter Sara who tells you that she has been admitted to the hospital with vomiting. Sara is asking about her mother’s test results. Please answer the following questions regarding your conversation with Sara.
Part 2: Day 1
Initially, Mrs. K.B. lost water, sodium in the mucus content, and hydrogen and chloride ions in the hydrochloric acid portion of the gastric secretions.
Alkalosis develops for two reasons, the first being the direct loss of ________ ions, and the second being the effects of chloride ion loss. When chloride ions are lost in the gastric secretions, it is replaced by chloride from the serum (See Fig. 2.9 in Chapter 2 of your Gould text). To maintain equal numbers of cations and ________ in the serum, chloride ions, and bicarbonate ions can exchange places when needed. Therefore, more bicarbonate ions shift into the serum from storages sites in the _______________ to replace the lost chloride ions. More bicarbonate ions in the serum raise serum pH, and the result is hypochloremic alkalosis.
Part 3: Days 2-3
As Mrs. K.B. continues to vomit and is still unable to eat or drink any significant amounts, loss of the duodenal contents, which include intestinal, pancreatic, and biliary secretions, occurs. No digestion and absorption of any nutrients occurs.
Losses at this stage include water, sodium ions, potassium ions, and bicarbonate ions. Also, intake of glucose and other nutrients is minimal. Mrs. K.B. shows elevated serum sodium levels.
Sara has been at the hospital all morning waiting for the provider to come by with an update. Sara is rubbing her Mom’s back and she continues to complain back pain.
Mrs. K.B. reports using herbal compresses at home to help her back pain and that she usually takes two “extra-strong” Acetaminophen tablets every 4 hours and a Tylenol #3 whenever the pain is severe. Sara states that she has tried to get her Mom to use “more natural” treatments for her back but she “loves her Tylenol.”
Part 4: Day 3
Mrs. K.B. has spent the night in the ED due to a bed shortage and she is finally admitted to Med-Surg.
After a prolonged period of vomiting, metabolic acidosis develops. This change results from several factors.
Part 2: Day 1
Initially, Mrs. K.B. lost water, sodium in the mucus content, and hydrogen and chloride ions in the hydrochloric acid portion of the gastric secretions.
Alkalosis develops for two reasons, the first being the direct loss of hydrogen ions, and the second being the effects of chloride ion loss. When chloride ions are lost in the gastric secretions, it is replaced by chloride from the serum (See Fig. 2.9 in Chapter 2 of your Gould text). To maintain equal numbers of cations and cations in the serum, chloride ions, and bicarbonate ions can exchange places when needed. Therefore, more bicarbonate ions shift into the serum from storages sites in the erythrocytes to replace the lost chloride ions. More bicarbonate ions in the serum raise serum pH, and the result is hypochloremic alkalosis.
Which compartments are likely to be affected in this case by early fluid-loss?
The intracellular compartment is most likely affected in case of fluid loss. Because the intracellular fluid moves excessively to the extracellular space to compensate for the loss of fluid.
Explain how a loss of sodium ions contributes to dehydration.
When the sodium ions are lost, the water present in the intracellular fluid enters into extracellular space and causes swelling. Thus the shifting of intracellular fluid results in dehydration.
Describe the early signs of dehydration in Mrs. K.B.
The early signs of dehydration are
Describe the compensations for the losses of fluid and electrolytes that should be occurring in Mrs. K.B.
The fluid and electrolytes are compensated by a change in the ratio of the proportion of bicarbonate and carbonate ions to maintain normal pH and electrolyte level. Thus the kidney excretes less acid and decreases bicarbonate absorption to compensate for the fluid and electrolyte losses.
Explain why Mrs. K.B. may not be able to compensate for losses as well as a younger adult.
Mrs. K.B has vomiting and loss of duodenal contents results in dehydration. Thus kidney unable to receive enough blood to compensate for the loss results in decompensation. This leads to increased bicarbonate ions and results in metabolic alkalosis.
Mrs. K.B. is age 64 and has been a patient of yours for many years. You...
Mr. K. B. is age 81 and has had gastritis with severe vomiting for 3 days. He has a history of heart problems and is presently feeling dizzy and lethargic. His eyes appear sunken, his mouth dry, he walks unsteadily, and he complains of muscle aching, particularly in the abdomen, He is thirsty but is unable to retain food or fluid. A neighbor has brought Mr. K.B. to the hospital, where examination shows that his blood pressure is low, and...
potassiun muai B.s history, why might Cir have more serious effects on Part C: Day 3: Admission to the Hospita After a prolonged period vomiting bs of vomiting, metabolic acidosis develops. This change results from a number of factors: . Loss of bicarbon ate ions in duodenal secretions Lack of nutrients leading to cata bolism of stored fats and protein with production of excessive a amounts of ketoacids Dehydration and decreased blood volume leading to decreased excretion of acids by...
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Mrs. Gardner is 48 years old woman diagnosed with breast cancer. She has been enrolled in a clinical research trial testing the effectiveness of a new chemotherapeutic agent. After her second dose of the agent, she complains of feeling light-headed when she gets out of bed in the morning. Her blood pressure is found to fall from 135/80 to 105/70 when she goes from a supine to a standing position (i.e., orthostatic hypotension). She also complains of frequent urination and...
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