This study is a prospective, randomized, unblinded,crossover and controlled clinical trail. The first patient was enrolled on November 1, 2019. The follow-up visit of all enrolled patients in our center will be finished on June 30, 2021. There are two arms in our study : Test Group(IG,n=20) and Control Group(CG,n=20), 40 patients totally.~Test group: Needle-free injection device, Then traditional insulin pen Patients first received needle-free syringe for insulin injection 3~4 times per day for 2 weeks. After the period of 2 weeks, they then received conventional insulin pen for insulin injection 3~4 times per day for 2 weeks.~Control group: Traditional insulin pen , Then Needle-free injection device Patients first received conventional insulin pen for insulin injection 3~4 times per day for 2 weeks. After the period of 2 weeks, they then received needle-free syringe for insulin injection 3~4 times per day for 2 weeks.
This study is about the application of needle-free injection device in GDM patients in order to observe the variation of blood glucose and patients' experience compared to the traditional insulin pen injection. To provide evidence for the application of needle-free syringe injection in GDM patients.