1. Ua ntej thiab tom qab inflating lub hnab nqus tsev vacuum, ceev faj tsis txhob cia nws khawb los ntawm cov khoom ntse. Nws yog qhov zoo tshaj plaws los khiav nws ntawm lub txaj lossis ntawm lub rooj huv si. Yog tias muaj cov khoom ntse ntse hauv cov khoom khaws cia, ceev faj ntxiv. Muab tso rau hauv lub hnab nqus tsev. Tsis tas li ntawd, xyuam xim rau qhov chaw cia kom pom tias muaj cov khoom ntse los xyuas kom meej lub hnab ntim khoom. Qhov no yog qhov yooj yim tshaj plaws.
2. Cov khoom koj muab tso rau hauv yuav tsum nyob deb ntawm lub qhov ncauj ntawm lub hnab. Yog tias lawv nyob ze ntawm lub qhov ncauj ntawm lub hnab, lawv yuav yooj yim nthuav. Qhov no yog ib qho xwm txheej. Nws raug nquahu kom koj yuav cov hnab ntim txaus. Tom qab tag nrho, lub tshuab nqus tsev ntim hnab yog pheej yig. Ib lub hnab loj loj yuav tsis raug nqi ntau dua.
3. Ntxuav cov khoom yuav tsum khaws cia kom tsis txhob muaj cov khoom txawv teb chaws ua rau lub hnab puas. Qhov no kuj yooj yim to taub. Cov khoom txawv teb chaws yuav ua rau lub foob poob. Ib tus neeg siv khoom tau ntsib qhov teeb meem no ib hlis dhau los. Cov zaub mov kaw tsis tau muab ntxuav ua ntej, ua rau tag nrho cov khoom noj uas kaw tsis zoo. Qhov txawv txav tsis tau tshawb pom kom txog thaum cov ntxhiab tsw tawm. Qhov poob hnyav. Peb yuav tsum coj qhov no ua lus ceeb toom.