Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).

Abstract: In search of a practical biochemical test that will reflect hepatic steatosis, we assessed the significance of serum cholinesterase activity in 48 patients with nonalcoholic fatty liver, 16 obese subjects without fatty liver, 30 cases of chronic persistent hepatitis, 38 cases of chronic active hepatitis, and 20 cases of liver cirrhosis. Increased cholinesterase activity was observed in nonobese as well as obese patients with fatty liver, whereas obese subjects without fatty liver showed levels in the upper normal range. When we set a cutoff level above the upper normal limit, half of the patients with fatty liver showed values above it, with only a few overlaps with other patients. When obese patients with fatty liver took a low-caloric diet, cholinesterase activity decreased, clearly reflecting improvement of hepatic steatosis. Thus, measurement of cholinesterase activity is of diagnostic value and an alternative to computed tomography in hepatic steatosis, and will provide a practical measure for the assessment of effects during follow-up. 
 Which is the apt title for the abstract? option1: Serum cholinesterase in patients with fatty liver. option2: Functional architecture of cortex revealed by optical imaging of intrinsic signals.
Serum cholinesterase in patients with fatty liver.

Abstract: Pulmonary edema due to upper airway obstruction can be observed in a variety of clinical situations. The predominant mechanism is increased negative intrathoracic pressure, although hypoxia and cardiac and neurologic factors may contribute. Laryngospasm associated with intubation and general anesthesia is a common cause of pulmonary edema in children. However, only seven cases of pulmonary edema presumably due to laryngospasm have been reported in adolescents and adults. Five of the seven had other risk factors for upper airway obstruction, and in four, the diagnosis of "laryngospasm" could be explained by other factors. Patients with underlying risk factors for upper airway obstruction, such as a forme fruste of sleep apnea or nasopharyngeal abnormalities, appear to be at increased risk for the development of pulmonary edema in the setting of intubation and anesthesia. This form of pulmonary edema usually resolves rapidly without the need for aggressive therapy or invasive monitoring. 
 Which is the apt title for the abstract? option1: Post-extubation pulmonary edema following anesthesia induced by upper airway obstruction. Are certain patients at increased risk? option2: Visual evoked potentials in parkinsonism and dopamine blockade reveal a stimulus-dependent dopamine function in humans.
Post-extubation pulmonary edema following anesthesia induced by upper airway obstruction. Are certain patients at increased risk?

Abstract: Both halothane and nitrous oxide can be reduced at the cathode of a polarographic oxygen electrode, causing the electrode current to drift upward and report falsely high oxygen tension. Because transcutaneous oxygen tension is measured by a heated oxygen electrode, there is a potential for significant upward drift of these values. To examine the clinical significance of this drift, the following study was performed. Transcutaneous oxygen tension sensors were calibrated at oxygen tensions of 0 mm Hg and 157 mm Hg (room air) just before clinical use during anesthesia. This calibration was rechecked immediately upon removal of the sensor from the patient at the end of the anesthesia. The predominant anesthetic agent used and the duration of monitoring were noted from the record. Data were collected from 208 patients representing a total of 463.6 hours of anesthesia. The patients were divided into five groups based on anesthetic administered: halothane, enflurane, isoflurane, nitrous oxide-narcotic, and local/regional. The mean zero point recalibration value was 0.4 mm Hg or less for all agents except halothane, for which it was 1.8 +/- 3.2 mm Hg. This halothane drift was significantly greater than that for the other agents (P less than 0.01). Room air recalibration was not significantly different in any of the five groups, varying from 160 +/- 4.9 mm Hg for halothane to 157 +/- 4.9 mm Hg for enflurane. All these drift values are within the manufacturer's specifications. We conclude that the drift of the transcutaneous oxygen tension sensor due to anesthetic agents is not clinically significant. However, caution should be exercised when halothane is used during an extremely long period of anesthesia. 
 Which is the apt title for the abstract? option1: Effects of anesthetic agents on the drift of a transcutaneous oxygen tension sensor. option2: Immunoblot analysis of circulating antibodies against muscle proteins in amyotrophic lateral sclerosis and other neurologic diseases.

Effects of anesthetic agents on the drift of a transcutaneous oxygen tension sensor.

