Aims:To determine whether day and time of admission influences the practice patterns of the admitting general surgeon and subsequent outcomes for patients diagnosed with small bowel obstruction.Methods:A retrospective...Aims:To determine whether day and time of admission influences the practice patterns of the admitting general surgeon and subsequent outcomes for patients diagnosed with small bowel obstruction.Methods:A retrospective database review was carried out,covering patients admitted with the presumed diagnosis of partial small bowel obstruction from 2004–2011.Results:A total of 404 patients met the inclusion criteria.One hundred and thirty-nine were admitted during the day,93 at night and 172 on the weekend.Overall 30.2%of the patients were managed operatively with no significant difference between the groups(P=0.89);however,of patients taken to the operating room,patients admitted during the day received operative intervention over 24 hours earlier than those admitted at a weekend,0.79 days vs 1.90 days,respectively(P=0.05).Overall mortality was low at 1.7%,with no difference noted between the groups(P=0.35).Likewise there was no difference in morbidity rates between the three groups(P=0.90).Conclusions:Despite a faster time to operative intervention in those patients admitted during the day,our study revealed that time of admission does not appear to correlate to patient outcome or mortality.展开更多
The problem of stabilizing switched linear systems under asynchronous switching is addressed.The admissible edge-dependent average dwell time method is applied to design a switching signal that comprises slow admissib...The problem of stabilizing switched linear systems under asynchronous switching is addressed.The admissible edge-dependent average dwell time method is applied to design a switching signal that comprises slow admissible edge-dependent average dwell time and fast admissible edge-dependent average dwell time.Under this switching signal,the restriction that the maximum delay of asynchronous switching is known in advance is removed.The constructed Lyapunov function is associated with both the system mode and controller mode.The stabilization criteria and the corresponding algorithm are presented to obtain the controller gains and to design the switching signal.Finally,two examples are given to demonstrate the effectiveness of the proposed results.展开更多
文摘Aims:To determine whether day and time of admission influences the practice patterns of the admitting general surgeon and subsequent outcomes for patients diagnosed with small bowel obstruction.Methods:A retrospective database review was carried out,covering patients admitted with the presumed diagnosis of partial small bowel obstruction from 2004–2011.Results:A total of 404 patients met the inclusion criteria.One hundred and thirty-nine were admitted during the day,93 at night and 172 on the weekend.Overall 30.2%of the patients were managed operatively with no significant difference between the groups(P=0.89);however,of patients taken to the operating room,patients admitted during the day received operative intervention over 24 hours earlier than those admitted at a weekend,0.79 days vs 1.90 days,respectively(P=0.05).Overall mortality was low at 1.7%,with no difference noted between the groups(P=0.35).Likewise there was no difference in morbidity rates between the three groups(P=0.90).Conclusions:Despite a faster time to operative intervention in those patients admitted during the day,our study revealed that time of admission does not appear to correlate to patient outcome or mortality.
基金Project supported by the National Natural Science Foundation of China(Nos.61873331,61773236,and 61773235)the Natural Science Foundation of Shandong Province,China(No.ZR2020YQ48)。
文摘The problem of stabilizing switched linear systems under asynchronous switching is addressed.The admissible edge-dependent average dwell time method is applied to design a switching signal that comprises slow admissible edge-dependent average dwell time and fast admissible edge-dependent average dwell time.Under this switching signal,the restriction that the maximum delay of asynchronous switching is known in advance is removed.The constructed Lyapunov function is associated with both the system mode and controller mode.The stabilization criteria and the corresponding algorithm are presented to obtain the controller gains and to design the switching signal.Finally,two examples are given to demonstrate the effectiveness of the proposed results.
