Did I break the continuity of presence? Do I need a lawyer?

[kalina]

I became a lawful permanent resident in September, 2004. Since then I had 4 trips outside of the United States, for 178 days, 182 days, 110 days and 168 days.In all of them I traveled to my native country.Almost all my trips start in September and end in March. The trip with 182 days outside of the US possibly should be considered for 6 months (although 2008 was a leap year).
I am the only child of my parents, who still live abroad. I had to help them with some health issues and that was the reason for my absences.
During my trips I have not abandoned the United States. I am employed all the time while I am in the US ( last three years at one and the same company), I payed my taxes, I payed my car inssurance, cell phone bills without suspending them. I rent one and the same apartment.
Should I consider these 182 days as 6 months or more? What is the correct answer to that question in the application for naturalization . Does it mean I broke my continuous of residency?
Should I write an explanatory letter, or ot is better to hire a lawyer?
I would really appreciate your answers

[annjd]

See Green card: Abandonment of residence: WORLDLawDirect - Green card: Abandonment of residence