Hey,
The duration for P.G. Diploma courses in nursing is one year.
The minimum eligibility qualification to apply for Post Graduate Diploma in Nursing is to have Bachelors degree in Nursing from any recognised institute.
Here is the list of the specialisation post diploma courses in Nursing:
P.G. Diploma in Emergency Nursing
P.G. Diploma in Ontological Nursing and Rehabilitation
P.G. Diploma in critical care Nursing
P.G. Diploma in Neo-Natal Nursing
P.G. Diploma in Paediatric critical care Nursing
P.G. Diploma in mental health nursing
There are several Institutes that offer Post Graduate Diploma in Nursing like Government College Nursing,Kottayam,MIMS college of Nursing,Mallapuram and so on.
Post graduation Diploma in Nursing provides one with the required specialisation to be able to work in different health care sectors in a less time.
Hope this helps.
Good luck.