The Status Survey Of ICU Noise And Related Research On Patient’s Alarm Perception

Objective1.To understand the noise environment of the ICU in the general ward and the single ward.2.To investigate the sleep quality of ICU patients and the perception of instrument alarm sounds.Methods1.Used the 24-hour continuous equivalent sound pressure level method.The calibrated multi-functional sound level meter was selected to measure the noise in the general ward and single ward from Monday to Sunday for 7 days.Collected noise data,entered in an Excel,and drawn a 24-hour noise trend graph.Analyzed L_Aeq,maximum value,minimum value,L_dmax,L_nmax,L₁₀,L₉₀ of the two types of ICU wards.2.Used the self-made questionnaire,it was included three parts,namely the general data questionnaire,the Chinese version of the Richards-Campbell sleep scale and the noise source perception questionnaire.Fill in the perceptual questionnaire after listening to the recording,and enter the data into Excel and SPSS 20.0 for data analysis.Results1.The overall trend of the 24-hour equivalent continuous sound pressure level curve in the general ward was higher than that in the single ward.The L_Aeq of a general ward within one week is between 60⁶2dB（A）,both exceeding 60dB（A）;The L_Aeq of a single ward is between 59.0⁵9.9dB（A）,both exceeding 55dB（A）.The maximum noise of the two types of intensive care units are>60dB（A）,and both occur in the 15:30¹6:30 time period;the minimum values are all>45dB（A）,and they all appear at 1:30⁴:30 in the morning.The L_dmax is>80dB（A）,L_nmax is>78dB（A）;the the daytime L₁₀0 is>60dB（A）,and the nighttime L₁₀0 is>55dB（A）;The daytime L₉₀ and the nighttime L₉₀ is>55dB（A）.The L₁₀ of the large ward and the single ward were significantly different between daytimes,and there was no significant difference in L₉₀ between daytime and nighttime.2.The sleep quality scores of 122 patients ranged from 3 to 90（48.82±22.14）.Only 18%of patients had better sleep quality.The number of hospital stays in ICU was statistically significant（P<0.05）,and negatively correlated with sleep score.Among the resolutions of the instrument noise source,the most well-resolved alarms are the micro-pump and infusion pump alarms.Age,education level and the ability to distinguish the noise source were statistically significant（P<0.05）.There is a positive correlation between age and the ability to distinguish noise sources.The correlation coefficient is 0.317.There is a positive correlation between the degree of education and the ability to distinguish noise sources.The correlation coefficient is 0.396.At the same time,the long 9 groups of instrument alarm sounds had statistically significant differences（T<0.05）in patients’tension perception,disturbance perception and fear perception.Conclusion1.The noise value of the general ward is slightly higher than that of the single ward.The high value time is usually the time period of family visit,handover and back-up,and the 24-hour equivalent continuous sound level trend map changes with the schedule of medical staff and the working system of the ward.The L_Aeq,maximum value,minimum value,L_dmax,L_nmax,L₁₀,L₉₀ of the ICU general ward and single wards exceeded the recommended standards at home and abroad.2.The quality of sleep in most ICU patients is not high,and the length of hospital stay has an impact on sleep quality.The alarm sound of the instrument can upset and strain the patient,especially the alarm sound caused by the micro pump and the infusion pump as a noise source.The medical staff should still regulate their behavior,establish an instrument alarm management system,handle the instrument alarm sound as soon as possible,and reduce the noise source as much as possible.Provide a good treatment and work environment for patients and medical staff themselves.