Please assess the completion status of the following clinical trial:

Trial Title: Aminophylline for Patients With Post-Dural Puncture Headache

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: TREATMENT
- Time Perspective: None
- Masking: QUADRUPLE
- Phase: PHASE3
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* headache has developed after the dural puncture;~* PDPH was defined according to the International Classification of Headache Disorders III (ICHD-3) criteria;~* The VAS score of the headache was 5 or more than 5;~* age between 18 and 70 years old.~Exclusion Criteria:~* a previous history of headache that could interfere with PDPH diagnosis;~* a history of central nervous system diseases including intracranial hemorrhage, seizures, intracranial hypertension, and hydrocephalus;~* a history of cardiovascular system diseases including coronary heart disease, arrhythmias, and hypertension;~* a history of peptic ulcer.~* women who were pregnant, nursing, or planning a pregnancy.

- Gender: ALL
- Minimum Age: 18 Years
- Maximum Age: 70 Years
- Healthy Volunteers: f

Study Arms:
- Aminophylline group (Type: EXPERIMENTAL): IV injection of aminophylline
- isotonic saline group (Type: PLACEBO_COMPARATOR): IV injection of isotonic saline group

Based on this trial design, predict the completion outcome and termination type (if applicable).