.htaccess question

Hi,
Now I have set up the permalinks in my wp installation
https://www.sitename.com/%postname%
I have set up in single.php theme file to get a variable from the browser.
I use it like this:
https://www.sitename.com/%postname%/?variable_name=variable_value

Is there a way to send variables to the script using htaccess?
so the link will be
https://www.sitename.com/%postname%/variable_name/variable_value
or just https://www.sitename.com/%postname%/variable_value considering that the variable name will be the same all over my blog.

Also I use only 3 variable_values.

Thank You.