Feasibility Experimental Study Of Pressure Sensor On Prediction Of Internal Pressure In Acute Compartment Syndrome

Objective: This study is undertaken to explore a noninvasive,sustainable,sensitive and effective method by constructing an experimental model of osteofascial compartment to simulate the occurrence and development of acute compartment syndrome.The changes of external pressure values measured by membrane pressure sensor when the internal pressure changes were collected under the model of osteofascial compartment.Afterward,statistic analysis was conducted based on those data.analyzing the relationship between the data.Method: Three experiments were designed as below: 1)20 acute compartment syndrome models with diameter of 7cm gypsum fixation were used to detect 140 external pressure values by pressure sensors during the internal pressure changed from 10kpa?20kpa?30kpa?40kpa?50kpa?60kpa?70kpa.Multivariate analysis of variance was conducted based on previous results.2)10 gypsum-fixed acute compartmentsyndrome models with a diameter of 5 cm,7 cm and 10 cm were used to detect 210 external pressure values collected by the pressure sensor during the internal pressure value changed from 10kpa?20kpa?30kpa?40kpa ? 50 kpa ? 60 kpa ? 70 kpa respectively.Afterward,multivariate variance analysis was carried out.3)5 acute compartment syndrome models with diameter of 7cm gypsum fixation were used to detect 245 external pressure by pressure sensor at the same time on 7 consecutive days,respectively,during the internal pressure changed from the 10kpa?20kpa?30kpa?40kpa?50kpa?60kpa?70kpa.And repeated measurement variance analysis was conducted.Result: Pearson correlation analysis showed that r = 0.956,confirmed that the internal pressure of the model of acute compartment syndrome was positively correlated with the external pressure measured by pressure sensor,which opened up a new way for the detection of acute compartment syndrome.In experiment 2,the multivariate analysis of variance measured the values of external pressure of three groups with different diameters(p = 0.797,P > 0.05),and it is no significant difference.The diameter of the acute compartment syndrome model does not affect the change of external pressure.It indirectly shows that the membrane pressure sensor is suitable for people of different weight and can be widely used in clinic.There is no significant difference in the external pressure measured by the pressure sensor at different time.Thevariance analysis of repeated measurements in experiment 3 showed that p = 0.816,p > 0.05,and there was no significant difference.It showed that the sensitivity of the pressure sensor was not affected by the use time in a certain period of time,that is,the humidity of air and the temperature of environment would not affect the stability of the thin film pressure sensor in a short period of time,which could meet the monitoring of acute swelling period in the first 7 days after injury.Conclusion: In order to explore an effective,continuous and sensitive method for exploring acute compartment syndrome,the method of indirectly measuring the internal pressure of bone fascia by using thin film pressure sensor to measure the external pressure between the affected limbs and gypsum makes up for the deficiency of the traditional examination method.A non-traumatic examination opens up a new line of thought.