網路內科繼續教育
期間:"民國 89 年 04 月 06 日民國 89 年 04 月 23 日

Case Discussion
Case Report

The 45-year-old man was admitted for general weakness, blurred vision and abdominal pain since Mar. 4, 2000. He is a patient of diabetes mellitus and hypertension, but he did not receive regular medical control for years. Besides, he had chronic alcohol consumption. He experienced loose stool passage 7 to 8 times per day for about 10 days before admission. He drank large amount of alcohol on Mar. 3, and the above complaint developed in the next morning. There was no fever, abdominal pain or weight loss. He visited the ES of NTUH where abdominal cramping and dyspnea occurred thereafter. The patient denied any tobacco consumption. He had neither drug or food allergy history nor operation history. 
On physical examinations, he had clear consciousness. The body temperature was 36.5°C. The blood pressure and the heart rate were 105/88 mmHg and 117 beat per minute respectively. The respiratory rate was 20 breaths per minutes. His conjunctivae were not pale, and the sclera was anicteric. The pupil was symmetric with prompt light reflex. There was no goiter, jugular vein engorgement, or neck lymphadenopathy. His chest expanded symmetrically, and his breath sound was clear. The heart rate was rapid but regular. The abdomen was soft and flat. There was no any peritoneal sign. The bowel sound was normoactive. No pitting edema or petechia was found over the extremities. His peripheral pulses were symmetric. The skin and mucosa were dry.
The plain abdominal film at ES showed small intestine gas. Abdominal sonography revealed fatty liver, gall bladder stones, distension of stomach and small intestine. Coffee-ground substance was drained out from the NG tube. Therefore omeprazole was given. His chest X-ray image showed clear lung field. But the blood gas showed pH 6.785, PCO2 15.5 mmHg, PO2 148.5 mmHg, HCO3 2.3 mmol/L, and base excess –32.6. The urine ketone was “1+”. The lactate concentration was over 12 mmol/L. Leukocytosis without increasing immature WBC was found. Sodium bicarbonate was administered for correction of metabolic acidosis, and empiric antibiotics was given for possible sepsis. Because the blood pressure declined soon (down to 86/32 mmHg), he was admitted to ICU with inotropic agent using. 
 After admission, the dyspnea and hemodynamic state stabilized under glucose and thiamine therapy. The CT showed swelling and thickening of ascending colon. The initial serum ethanol concentration was 3 gm/dL and the methanol concentration was less than 1 mg/dL. Panendoscopy revealed superficial gastritis and duodenitis.  Acute pancreatitis developed two days later. Fortunately, the condition improved soon after supportive care. He was discharged on Mar. 13, 2000

His serial laboratory results were showed below
 
Day1
Day2
Day3
Day4
WBC (K/mL)
22.92
11.62
 
6.6
A/G (g/dL)
 
3.2/2.4
   
Bilirubin (mg/dL)
 
1.4
   
GOT/GPT (U/L)
 
16/27
   
BUN (mg/dL)
8.3
     
Creatinine (mg/dL)
1.0
     
T-CHO (mg/dL)
 
61
   
Triglyceride (mg/dL)
 
101
   
Glucose (mg/dL)
80
     
Amylase (IU/L)
108
 
423
492
Lipase (IU/L)
201
 
756
3481
PH
6.785
7.389
7.440
 
PCO2
15.5
29.1
39.0
 
HCO3
2.3
17.6
26.6
 
Na (mmol/L)
136
     
K (mmol/L)
3.1
     
Cl (mmolL)
99
     

病案分析

45歲男性, underlying disease為高血壓 糖尿病 以及chronic alcoholism這次來院的主訴為 來院前一天大量飲酒後發生腹痛 全身無力 及視力模糊 若考慮患者的腹痛與飲酒是否有關 則應將急性胰臟炎 急性胃炎 或急性消化性潰瘍列入鑑別診斷 因患者糖尿病未接受規則治療 應注意有無糖尿病酮酸血症或HHNK之可能 少數酒癮患者突然減少酒精攝取 會發生alcoholic ketoacidosis其臨床表現亦類似 此外drug(如salicylate) 及toxic alcohol(如methanol, ethylene glycol)中毒應加以排除
又 患者為CAD之高危險群 部份下壁心肌梗塞患者以上腹痛表現也是應值得注意的 所以腹痛的病人應該要考慮做心電圖的需要性
 

 
繼續教育考題
1. (A) How do you interpret his acid-base status?
APure anion-gap metabolic acidosis
BPure non-anion gap metabolic acidosis
CMixed anion gap and non-anion gap metabolic acidosis
DRespiratory acidosis
2. (C) What is the most possible diagnosis of this patient?
AAlcoholic ketoacidosis with lactic acidosis
BLactic acidosis
CAlcoholic ketoacidosis
DAlcoholic ketoacidosis with lactic acidosis
3. (D) What is (are) the possible predisposing factor(s)?
ADehydration
BStarvation
CInfection
DAll of above
4. (A) What is the possible major anion attributing his metabolic acidosis other than lactate?
Aß-hydroxybutyraten
BAcetoacetate
CKetone
DPyruvate
5. (D) What is the possible for alcoholism related lactic acidosis?
AOverproduction of lactate from the alcohol metabolismn
BThiamine deficienc
CLiver insufficienc
DAll of the above
6. (D) What is the possible cause(s) of his high lactate level?
APneumoni
BGastrointestinal bleeding
CSevere thiamine deficienc
DB and C
7. (B) What is the wrong mention about the pathophysiology of alcoholic ketoacidosis?
AOften predisposed by volume depletion
BDecreased NADH/NAD ratio
CIncreased stress hormones
DOften combining with mild lactic acidosis
8. (B) As above, what is the wrong mention about the pathophysiology of alcoholic ketoacidosis?
ADecreased glycogen store
BIncreased gluconeogenesis from lactate
CDecreased insulin/glucagons ratio
DIncreased fatty acid production
9. (C) What is the wrong mention about the clinical diagnosis of alcoholic ketoacidosis?
AHigh anion-gap metabolic acidosis
BExcluding methanol or ethylene glycol poisoning
Cß-hydroxybutyrate : acetoacetate 相等於 @ 1:6
DOnly mild elevated level of the urine ketone
10. (A) What is the wrong mention about his treatment?
ABicarbonate treatment is importantn
BVolume replacement with potassium supply is usually needed.
CInsulin should be avoided because of normal or low blood sugar
DThiamine should be used accompany with glucose supply.

答案解說
1. 由ABG data中 血液之pH值可知呈酸中毒 因HCO3值下降 故應為代謝性酸中毒 單純之代謝性酸中毒 HCO3每下降1 mmol/L CO2則相對下降1.2 mmHg
2. 計算病人血漿中的anion gap值為(Na-Cl-HCO3)=136-99-2=25故為high anion gap metabolic acidosis 要考慮的病因為1) lactic acidosis, 2) ketoacidosis,包括diabetic ketoacidosis和alcoholic ketoacidosis, 3) toxins, 包括ethylene glycol, methanol, salicylate, 4) acute and chronic renal failure. 患者尿液中可測驗出ketone但血糖 值不高 BUN/creatinine值亦偏低 無服用藥物 血中methanol及ethanol濃度不高
3. Alcoholic ketoacidosis常因患者嘔吐 腹痛 以致突然減少飲酒量或因starvation, volume depletion, infection 而促使其發生本病人lactate level亦高
4. 血液中的ketone以β-hydroxybutyrate為主 故ketoacidosis及ketouria的程度通常會被低估
5.  
6.  
7. Alcoholic ketoacidosis通常會合併mild lactic acidosis, 同時可觀察到患者的blood sugar及 insulin level較低cortisol, glucagon及growth hormone的濃度上升
8. 因患者的血中insulin level降低 故肝醣的合成 醣質新生作用(gluconeogenesis)均降低 而身體轉而增加lipid的分解 以利用fatty acid
9. (見前述)
10. 治療以補充體液及投予iv glucose water為主 在chronic alcoholism的病人應在給予 含糖點滴輸注時同時給予thiamine以避免發生Wernicke-Korsakoff encephalopathy. 此外要特別注意電解質的平衡(hypophosphatemia, hypokalemia, hypomagnesemia) 肺炎 胰臟炎 及上消化道出血亦常與此疾患合併發生


Top of Page