She has encouraged other family members to quit as well as she does not want them smoking around baby Marewa.
BOPDHB Midwife Natasha Rawiri said Ms Paki's response was not uncommon. For example, one expectant mum burst into tears the first time she used one of the monitors.
"The reading wasn't exceptionally high but it was enough to make her stop and think," Ms Rawiri said.
"A lot of the comments we get are that having the figures staring you in the face, physically seeing them and knowing what that means, really makes it sink in.
"Smoking lowers the levels of oxygen in your blood and for pregnant women that means their babies are not getting the oxygen they need. That can have a range of impacts depending on the level."
The handheld carbon monoxide monitor, the piCObabyTM Smokerlyzer®, works in the same way as a breathalyzer with the mum-to-be delivering a long, slow breath into it. Staff then use the reading to establish the woman's smoking dependence and plan the best treatment for her. The use of nicotine replacement therapy (NRT) is often recommended for pregnant women who are unable to stop smoking on their own.
"We would encourage any pregnant woman who smokes to use the machine," Ms Rawiri said.
"It spells out where you are and where you should be."