Urinary retention is the inability to empty the bladder. Dysuria means difficult urination. The absence of urinary output is called anuria. The inability to form urine is term â¦ ed anuria.
Some experts recommend changing your air filter as often as every 3,000 miles (4,828 kilometers), along with changing the oil [source: 2CarPros.com ].Others say that's a little too excessive and that you should simply use your judgment in visually spot-checking the air filter and change it out when it looks dirty.ome experts recommend changing your air filter as often as every 3,000 miles (4,828 kilometers), along with changing the oil [source: 2CarPros.com ].
The answer is simple this; remember to change the heating and air conditioning air filter. Changing furnace and return air filters is critical to the proper performance of your HVAC system, not to mention your home's air quality.hen To Change Your Air Filters. This is not a trick; simply put â when your air filters are dirty, change them. Choosing how often to change your air filters can depend on several factors: 1  Type of filter your A/C system requires.