Philip Wai Yan Chiu

Prof. Dr. Philip Wai Yan Chiu


Research Focus & Metrics

Academic Career Length

26Years (2001-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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5 January 2010 in Annals of Internal Medicine
Verified
Journal Article
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JSJoseph JY Sung
Joseph JY Sung
JLJames Y.W. Lau
James Y.W. Lau
JCJessica Y.L. Ching
Jessica Y.L. Ching
JWJustin C.Y. Wu
Justin C.Y. Wu
YLYuk T. Lee
Yuk T. Lee
Francis Ka Leung ChanFrancis Ka Leung Chan
Francis Ka Leung Chan
It is uncertain whether aspirin therapy should be continued after endoscopic hemostatic therapy in patients who develop peptic ulcer bleeding while receiving low-dose aspirin. To test that continuing aspirin therapy with proton-pump inhibitors after endoscopic control of ulcer bleeding was not inferior to stopping aspirin therapy, in terms of recurrent ulcer bleeding in adults with cardiovascular or cerebrovascular diseases. A parallel randomized, placebo-controlled noninferiority trial, in which both patients and clinicians were blinded to treatment assignment, was conducted from 2003 to 2006 by using computer-generated numbers in concealed envelopes. (ClinicalTrials.gov registration number: NCT00153725) A tertiary endoscopy center. Low-dose aspirin recipients with peptic ulcer bleeding. 78 patients received aspirin, 80 mg/d, and 78 received placebo for 8 weeks immediately after endoscopic therapy. All patients received a 72-hour infusion of pantoprazole followed by oral pantoprazole. All patients completed follow-up. The primary end point was recurrent ulcer bleeding within 30 days confirmed by endoscopy. Secondary end points were all-cause and specific-cause mortality in 8 weeks. 156 patients were included in an intention-to-treat analysis. Three patients withdrew from the trial before finishing follow-up. Recurrent ulcer bleeding within 30 days was 10.3% in the aspirin group and 5.4% in the placebo group (difference, 4.9 percentage points [95% CI, −3.6 to 13.4 percentage points]). Patients who received aspirin had lower all-cause mortality rates than patients who received placebo (1.3% vs. 12.9%; difference, 11.6 percentage points [CI, 3.7 to 19.5 percentage points]). Patients in the aspirin group had lower mortality rates attributable to cardiovascular, cerebrovascular, or gastrointestinal complications than patients in the placebo group (1.3% vs. 10.3%; difference, 9 percentage points [CI, 1.7 to 16.3 percentage points]). The sample size is relatively small, and only low-dose aspirin, 80 mg, was used. Two patients with recurrent bleeding in the placebo group did not have further endoscopy. Among low-dose aspirin recipients who had peptic ulcer bleeding, continuous aspirin therapy may increase the risk for recurrent bleeding but potentially reduces mortality rates. Larger trials are needed to confirm these findings. Institute of Digestive Disease, Chinese University of Hong Kong.

17 March 2021 in Science Robotics
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Journal Article
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BWBen Wang
Ben Wang
KCKai Fung Chan
Kai Fung Chan
KYKe Yuan
Ke Yuan
Qianqian WangQianqian Wang
Qianqian Wang
XXXianfeng Xia
Xianfeng Xia
Li ZhangLi Zhang
Li Zhang
Biohybrid soft microrobots are rapidly delivered to tortuous and tiny lumens deep inside the digestive system.

4 June 2021 in Science Advances
Verified
Journal Article
Open access
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XPXin Peng
Xin Peng
XXXianfeng Xia
Xianfeng Xia
XXXiayi Xu
Xiayi Xu
XYXuefeng Yang
Xuefeng Yang
BYBoguang Yang
Boguang Yang
Liming BianLiming Bian
Liming Bian
Ultrafast self-gelling polymeric powder with strong wet bioadhesion can be used as effective tissue sealant.

12 March 2020 in Gut
Verified
Journal Article
Closed access
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ATAnthony YB Teoh
Anthony YB Teoh
MKMasayuki Kitano
Masayuki Kitano
TITakao Itoi
Takao Itoi
MPManuel Pérez-Miranda
Manuel Pérez-Miranda
TOTakeshi Ogura
Takeshi Ogura
JLJames Yun Wong Lau
James Yun Wong Lau
Objective The optimal management of acute cholecystitis in patients at very high risk for cholecystectomy is uncertain. The aim of the current study was to compare endoscopic ultrasound (EUS)-guided gallbladder drainage (EUS-GBD) to percutaneous cholecystostomy (PT-GBD) as a definitive treatment in these patients under a randomised controlled trial. Design Consecutive patients suffering from acute calculous cholecystitis but were at very high-risk for cholecystectomy were recruited. The primary outcome was the 1-year adverse events rate. Secondary outcomes include technical and clinical success, 30-day adverse events, pain scores, unplanned readmissions, re-interventions and mortalities. Results Between August 2014 to February 2018, 80 patients were recruited. EUS-GBD significantly reduced 1 year adverse events (10 (25.6%) vs 31 (77.5%), p<0.001), 30-day adverse events (5 (12.8%) vs 19 (47.5%), p=0.010), re-interventions after 30 days (1/39 (2.6%) vs 12/40 (30%), p=0.001), number of unplanned readmissions (6/39 (15.4%) vs 20/40 (50%), p=0.002) and recurrent cholecystitis (1/39 (2.6%) vs 8/40 (20%), p=0.029). Postprocedural pain scores and analgesic requirements were also less (p=0.034). The technical success (97.4% vs 100%, p=0.494), clinical success (92.3% vs 92.5%, p=1) and 30-day mortality (7.7% vs 10%, p=1) were statistically similar. The predictor to recurrent acute cholecystitis was the performance of PT-GBD (OR (95% CI)=5.63 (1.20–53.90), p=0.027). Conclusion EUS-GBD improved outcomes as compared to PT-GBD in those patients that not candidates for cholecystectomy. EUS-GBD should be the procedure of choice provided that the expertise is available after a multi-disciplinary meeting. Further studies are required to determine the long-term efficacy. Trial registration number NCT02212717

19 April 2007 in New England Journal of Medicine
Verified
Journal Article
Open access
PDF file
JLJames Y. Lau
James Y. Lau
WLWai K Leung
Wai K Leung
JWJustin C.Y. Wu
Justin C.Y. Wu
Francis Ka Leung ChanFrancis Ka Leung Chan
Francis Ka Leung Chan
VWVincent W.S. Wong
Vincent W.S. Wong
JSJoseph JY Sung
Joseph JY Sung
A neutral gastric pH is critical for the stability of clots over bleeding arteries. We investigated the effect of preemptive infusion of omeprazole before endoscopy on the need for endoscopic therapy. Consecutive patients admitted with upper gastrointestinal bleeding underwent stabilization and were then randomly assigned to receive either omeprazole or placebo (each as an 80-mg intravenous bolus followed by an 8-mg infusion per hour) before endoscopy the next morning. Over a 17-month period, 638 patients were enrolled and randomly assigned to omeprazole or placebo (319 in each group). The need for endoscopic treatment was lower in the omeprazole group than in the placebo group (60 of the 314 patients included in the analysis [19.1%] vs. 90 of 317 patients [28.4%], P=0.007). There were no significant differences between the omeprazole group and the placebo group in the mean amount of blood transfused (1.54 and 1.88 units, respectively; P=0.12) or the number of patients who had recurrent bleeding (11 and 8, P=0.49), who underwent emergency surgery (3 and 4, P=1.00), or who died within 30 days (8 and 7, P=0.78). The hospital stay was less than 3 days in 60.5% of patients in the omeprazole group, as compared with 49.2% in the placebo group (P=0.005). On endoscopy, fewer patients in the omeprazole group had actively bleeding ulcers (12 of 187, vs. 28 of 190 in the placebo group; P=0.01) and more omeprazole-treated patients had ulcers with clean bases (120 vs. 90, P=0.001). Infusion of high-dose omeprazole before endoscopy accelerated the resolution of signs of bleeding in ulcers and reduced the need for endoscopic therapy. (ClinicalTrials.gov number, NCT00164866.)

1 May 2007 in The Lancet
Verified
Journal Article
Closed access
Francis Ka Leung ChanFrancis Ka Leung Chan
Francis Ka Leung Chan
VWVincent Wai Sun Wong
Vincent Wai Sun Wong
BSBing Yee Suen
Bing Yee Suen
JWJustin Che Yuen Wu
Justin Che Yuen Wu
JCJessica Yuet Ling Ching
Jessica Yuet Ling Ching
JSJoseph JY Sung
Joseph JY Sung