Purpose: To detect the impact of manual diaphragmatic release technique on diaphragmatic excursion post partial pancreaticoduodenectomy. 
Materials and Methods: A total of 60 participants who are from 35 to 55 years old, undergone partial pancreaticoduodenectomy. The individuals were randomized into two groups the experimental group(n=30), were administered a manual diaphragmatic release technique with traditional physiotherapy program while the control group(n=30), were administered traditional physiotherapy program. The treatment interventions were administered 3 sessions per week one hour per session for a duration of four weeks. The diaphragmatic excursion was assessed by ultrasonography which were taken both before and after a four-week period of interventions.
Results: following 4 weeks of treatment, both groups exhibited a statistically substantial difference in diaphragmatic excursion on the right and left sides compared with pretreatment. No statistically significant difference was seen between the two groups before the treatment (p > 0.05). A statistically significant difference was found between groups A and B after treatment in terms of axillary as well as clavicular diaphragmatic excursion on the right as well as left sides (p < 0.01).
Conclusion: Adding manual diaphragmatic release technique to complete traditional physiotherapy program may have a greater efficacy on improving diaphragmatic excursion for patients post pancreaticoduodenectomy.