| 1. |
- Wenner, Jörgen, et al.
(författare)
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Acid Reflux Immediately Above the Squamocolumnar Junction and in the Distal Esophagus: Simultaneous pH Monitoring Using the Wireless Capsule pH System.
- 2006
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Ingår i: American Journal of Gastroenterology. - : Ovid Technologies (Wolters Kluwer Health). - 1572-0241 .- 0002-9270. ; 101:8, s. 1734-1741
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The pattern of reflux in the most distal esophagus of asymptomatic individuals is largely unknown. Using a wireless technique we compared the degree and the pattern of acid reflux just above the squamocolumnar junction (SCJ) with that measured at the conventional level for pH monitoring. METHODS: Fifty-three asymptomatic volunteers underwent endoscopy with transoral placement of two pH recording capsules, one immediately above and one 6 cm above the SCJ. Ambulatory pH monitoring was performed during 48 h. RESULTS: Three subjects were excluded as the distal capsule was inadvertently placed with the pH electrode below the SCJ. The median percent time with pH < 4 and the median number of reflux episodes were significantly higher immediately above the SCJ compared with that found more proximally (16% vs 0.9% and 67 vs 26, p < 0.0001). Of all acid reflux events, 69% were isolated episodes immediately above the SCJ. Only 26% of reflux episodes detected at the SCJ extended to the more proximal pH electrode. Reflux events occurring just above the SCJ were more acidic. The number of reflux events with a minimum pH below 2 or 3 was significantly higher at the SCJ compared with that recorded by the upper capsule (1.6% and 44% vs 6% and 34%, p < 0.0001). CONCLUSIONS: Conventional pH monitoring substantially underestimates the degree of acid exposure in the most distal esophagus. In healthy subjects, acid exposure immediately above the SCJ was considerably higher and was characterized by shorter reflux episodes that had a lower minimum pH compared with that measured at the traditional level for pH monitoring.
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| 2. |
- Wenner, Jörgen, et al.
(författare)
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Optimal Thresholds and Discriminatory Power of 48-h Wireless Esophageal pH Monitoring in the Diagnosisof GERD.
- 2007
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Ingår i: American Journal of Gastroenterology. - : Ovid Technologies (Wolters Kluwer Health). - 1572-0241 .- 0002-9270. ; 102:9, s. 1862-1869
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: The discriminative power of 48-h wireless esophageal pH monitoring in the diagnosis of gastroesophageal reflux disease has not been clearly demonstrated, and the cutoff level for esophageal acid exposure generating the optimal sensitivity and specificity is unknown. SUBJECTS AND Patients with typical reflux symptoms and a distinct response to acid suppressive medication METHODS: underwent upper GI endoscopy followed by 48-h wireless esophageal pH studies with the pH electrode placed 6 cm above the squamocolumnar junction. The results were compared to those obtained in 55 healthy controls. Sensitivity, specificity, and thresholds for esophageal acid exposure were analyzed using receiver operating characteristic (ROC) curves. RESULTS: The patient population consisted of 64 patients, 25 women and 39 men, with a median age of 48 yr. Analysis of the area under the ROC curve showed that, for all patients as well as for subgroups of patients with (N = 33) and without (N = 31) esophagitis, the total percent time with pH < 4 for the 48-h study period was the best parameter to discriminate patients from controls. Analysis of acid exposure for day 1, day 2, or using the day with the highest acid exposure did not improve the diagnostic accuracy. A test specificity in the range of 90-95% resulted in a cutoff level of 3.6-4.4% of the total time with pH < 4 for the 48-h period. This threshold generated a test sensitivity of 59-64% in all patients, 76-79% for patients with esophagitis and 42-48% in patients with no esophagitis. CONCLUSIONS: The total percentage of time that esophageal pH was less than 4 for the entire 48-h study period was the parameter that best discriminated patients with typical reflux symptoms from healthy controls, and to achieve a specificity of 90-95% a cutoff level of 4% is recommended. The low sensitivity of wireless pH recording in patients without erosive esophagitis substantially reduces the clinical value of the test.
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| 3. |
- Wenner, Jörgen, et al.
(författare)
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Wireless Esophageal pH Monitoring Is Better Tolerated than the Catheter-Based Technique: Results from a Randomized Cross-Over Trial.
- 2007
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Ingår i: American Journal of Gastroenterology. - : Ovid Technologies (Wolters Kluwer Health). - 1572-0241 .- 0002-9270. ; 102:2, s. 239-245
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: Esophageal pH monitoring using a wireless pH capsule has been suggested to generate less adverse symptoms resulting in improved patient acceptance compared with the catheter-based method although evidence to support this assumption is lacking. The aim of this study was to evaluate and compare the subjective experience of patients undergoing both techniques for esophageal pH monitoring. METHODS: Using a randomized study design, patients referred for esophageal pH testing underwent both wireless and traditional catheter-based 24-h pH recording with a 7-day interval. The wireless pH capsule was placed during endoscopy and followed by 48-h pH recording. All patients answered a questionnaire, including a 10-cm visual analog scale (VAS), which described the perceived severity of symptoms and the degree of interference with normal daily activities during the pH tests. RESULTS: Thirty-one patients, 16 women and 15 men, were included in the analysis. The severity of all adverse symptoms associated with the wireless technique was significantly lower compared with the catheter-based technique (median VAS 2.1 vs 5.1, P < 0.001). Wireless pH recording was associated with less interference with off-work activities and normal daily life, median VAS 0.6 and 0.7 compared with 5.0 and 5.7, respectively, for the catheter-based technique (P < 0.001). Patients actively working during both tests reported less interference with normal work during the capsule-based test than during the catheter-based pH test (median VAS 0.3 vs 6.8, P = 0.005). Twenty-seven patients (87%) stated that, if they had to undergo esophageal pH monitoring again, they preferred the wireless test over the catheter-based pH test (P < 0.0001). CONCLUSIONS: This randomized study showed that a significant majority of patients undergoing esophageal pH monitoring preferred the wireless pH capsule over the traditional catheter-based technique because of less adverse symptoms and less interference with normal daily life.
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| 4. |
- Wenner, Jörgen, et al.
(författare)
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Wireless pH Recording Immediately Above the Squamocolumnar Junction Improves the Diagnostic Performance of Esophageal pH Studies.
- 2008
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Ingår i: American Journal of Gastroenterology. - : Ovid Technologies (Wolters Kluwer Health). - 1572-0241 .- 0002-9270. ; 103, s. 2977-2985
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND AND AIMS: The optimal position for pH electrode placement in the diagnosis of gastroesophageal reflux disease (GERD) is unknown. The aim of this study was to evaluate the discriminatory power of targeted pH recording immediately above the squamocolumnar junction (SCJ) and to compare the results with those obtained by simultaneous recording at the conventional level for pH monitoring. SUBJECTS AND METHODS: Sixty-two patients with typical reflux symptoms and 49 asymptomatic volunteers underwent 48-h simultaneous wireless pH monitoring with two endoscopically placed pH recording capsules, one immediately above the SCJ and one at the traditional position, 6 cm above the SCJ. The diagnostic accuracy, sensitivity, and specificity of pH monitoring at the two levels were analyzed using receiver operating characteristics (ROC) curves. RESULTS: Of the 62 patients (39 men and 23 women, median age 48 yrs), 32 patients had erosive esophagitis and 30 had no endoscopic evidence of mucosal injury. Analysis of the area under the ROC curve (AUC) indicated that the total percent time with pH<4 for the entire 48-h period was the parameter that best distinguished GERD patients from controls. pH monitoring performed directly above the SCJ significantly increased the number of patients correctly classified with GERD compared to standard electrode placement. With a predefined test specificity of 90%, pH monitoring immediately above the SCJ increased the sensitivity of the test from 63% to 86% in all patients, from 78% to 97% in patients with esophagitis and from 47% to 73% in patients with no esophagitis. CONCLUSIONS: Compared to standard electrode placement, wireless pH recording immediately above the SCJ improved the diagnostic performance of esophageal pH monitoring in patients with GERD.
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| 6. |
- Fall, Katja, 1971-, et al.
(författare)
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Risk for gastric cancer after cholecystectomy
- 2007
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Ingår i: American Journal of Gastroenterology. - Oxon, United Kingdom : Blackwell Publishing. - 0002-9270 .- 1572-0241. ; 102:6, s. 1180-4
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Tidskriftsartikel (refereegranskat)abstract
- Background: It is becoming increasingly evident that chronic inflammation may predispose cancer development. In the stomach, inflammation caused by Helicobacter pylori infection is linked to gastric cancer. Cholecystectomy is regularly followed by duodenogastric bile reflux and reactive gastritis. To test whether a noninfectious long-standing inflammation impels gastric carcinogenesis as well, we assessed the risk of gastric cancer in a large, population-based cohort of cholecystectomized patients.Methods: We identified 251,672 individuals, in the Swedish National Inpatient Register, who had undergone cholecystectomy between 1970 and 1997. All incident cases of gastric cancer were identified through linkage to the Swedish Cancer Registry. Standardized incidence ratios (SIRs) were calculated for comparisons with cancer rates of the general population in Sweden.Results: We found an 11% greater overall risk of distal gastric cancer (SIR=1.11, 95% CI 1.04-1.19). The risk increase was only observed among men (SIR=1.21, 95% CI 1.10-1.32), whereas no excess risk was evident for women. For men, the risk was elevated for up to 10 yr after surgery, but this elevation disappeared with longer follow-up time. There was no clear association between cholecystectomy and cardia cancer (SIR=0.95, 95% CI 0.76-1.16).Conclusions: Inconsistency over gender strata, implausibly short induction and latency time, and disappearance of the effect over time makes a causal relationship between cholecystectomy and distal gastric cancer less likely. The findings set aside concerns of harmful long-term consequences of cholecystectomy.
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| 7. |
- Gustavsson, Anders, et al.
(författare)
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Long-term colectomy rate after intensive intravenous corticosteroid therapy for ulcerative colitis prior to the immunosuppressive treatment era
- 2007
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Ingår i: American Journal of Gastroenterology. - New York : American College of Gastroenterology. - 0002-9270 .- 1572-0241. ; 102:11, s. 2513-2519
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: Corticosteroids are a cornerstone in the treatment of a severe attack of ulcerative colitis (UC). The long-term prognosis in this patient group is not well described. We studied the long-term colectomy and relapse rates in patients given intensive intravenous corticosteroid treatment (IIVT) for acute UC. METHODS: A retrospective clinical study of 158 patients with UC treated in 1975-1982 with IIVT. Patients were followed-up to death, colectomy or last visit. RESULTS: A total of 11 patients were excluded due to change of diagnosis (N = 10) or lost to follow-up (N = 1). The indication for index IIVT in the remaining 147 patients was a severe attack (N = 61), a moderately severe attack (N = 45), a mild attack (N = 29) or chronic continuous disease (N = 12). The median (range) duration of follow-up was 173 (4-271) months in patients escaping colectomy during the first 3 months. Three months after IIVT, the colectomy rates were 28/61 (46%) in a severe attack, 4/45 (9%) in a moderately severe, and 1/29 (3%) in a mild attack. After 10 yr, the colectomy rates were 39/61 (64%), 22/45 (49%), and 8/29 (28%), respectively. During follow-up, neither colectomy incidence beyond 3 months, time to first relapse nor relapse incidence was influenced by severity of initial attack, except for a lower relapse incidence after a severe attack. CONCLUSIONS: In patients escaping colectomy during the first 3 months after IIVT, the future prognosis was similar irrespective of initial disease severity.
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| 8. |
- Kaplan, G.G., et al.
(författare)
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The risk of developing Crohn's disease after an appendectomy : A meta-analysis
- 2008
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Ingår i: American Journal of Gastroenterology. - : Ovid Technologies (Wolters Kluwer Health). - 0002-9270 .- 1572-0241. ; 103:11, s. 2925-2931
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Tidskriftsartikel (refereegranskat)abstract
- BACKGROUND: Studies exploring the association between appendectomy and Crohn's disease (CD) have reported conflicting findings. We conducted a systematic review of the literature and a meta-analysis to assess the risk of CD following an appendectomy and determine the effect of time between appendectomy and CD diagnosis. METHODS: MEDLINE was used to identify observational studies evaluating the association between appendectomy and CD. Authors were contacted when data were insufficient. Relative risks (RR) with 95% confidence intervals (CI) were calculated using a random effects model. Studies that analyzed their data by the interval between the appendectomy and the diagnosis of CD were assessed separately. The Woolf ?2 statistic was used to test for homogeneity. Egger's test was used to evaluate publication bias. RESULTS: The summary RR estimate for CD following an appendectomy was significantly elevated (RR 1.61, 95% CI 1.28-2.02), though heterogeneity was observed (P < 0.0001). The risk was elevated within the first year following the operation (RR 6.69, 95% CI 5.42-8.25). The risk of CD was also significantly increased 1-4 yr following an appendectomy (RR 1.99, 95% CI 1.66- 2.38), however, after 5 yr or more, the risk fell to baseline levels (RR 1.08, 95% CI 0.99-1.18). Publication bias was not detected (P = 0.2). CONCLUSION: The meta-analysis demonstrated a significant risk of CD following an appendectomy, though heterogeneity was observed between the studies. The elevated risk early after an appendectomy, which diminishes thereafter, likely reflects diagnostic problems in patients with incipient CD. © 2008 by Am. Coll. of Gastroenterology.
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