occulting penis
Conditions
Interventions
Experimental group:Dixon method: The modified Dixon sequential method was used for the experiment. If the caudal epidural block fails, the ropivacaine dose for subsequent subjects is increased
conversely (i.e., negative response), the dose is decreased. The fixed incremental or decremental dose between children is 0.01 mg/kg. The formal test starts from the first crossover wave and continue
Sponsors
The First Affiliated Hospital of Ningbo University
Eligibility
Sex/Gender
Male
Age
7 Years to 13 Years
Inclusion criteria
Inclusion criteria: School age children aged 7-13 years with ASAI-II grade who have undergone penile concealment surgery
Exclusion criteria
Exclusion criteria: (1) Known cardiopulmonary disease (such as uncorrected congenital heart disease, primary or secondary pulmonary hypertension, tumor or structural lung disease) (2) Neuromuscular diseases (3) Intraspinal block contraindications (abnormal coagulation, spinal deformity) (4) Neurogenesis lag (5) Allergic to ropivacaine (6) Parents refuse their children to participate in the experiment.
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| the 50% effective dose (ED50) and 95% effective dose (ED95); | — |
Secondary
| Measure | Time frame |
|---|---|
| The onset time of sensory block;Efficacy rating of subarachnoid block;the maintenance time of sensory nerve block;the maximum Bromage grade;the maintenance time of motor nerve block; | — |
Countries
China
Contacts
Public ContactBinbin Zhu
The First Affiliated Hospital of Ningbo University
Outcome results
None listed