Purpose:　Capillary　Refill　Time　(CRT)　measurement　has　gained　increasing　attention　in　the　field　of　sepsis　and　septic　shock.　Recognizing　pressure　as　a　fundamental　determinant　in　CRT　measurement　is　crucial　for　establishing　a　standardized　CRT　measurement　procedure.　In　this　preliminary　study,　we　elucidated　the　optimal　pressing　strength　for　CRT　measurement　by　analyzing　the　CRTs　measured　under　varying　pressures.　Method:　Seventeen　healthy　individuals　were　enlisted　to　undergo　CRT　tests　on　their　fingertips　at　various　pressure　levels.　The　applied　force　was　initiated　at　0.5N　and　incrementally　increased　by　0.5N　until　it　reached　10.5N.　An　integrated　Photoplethysmography　(PPG)　device　was　employed　to　capture　fluctuations　in　light　intensity.　The　CRT　was　automatically　derived　from　the　PPG　signals　via　a　specialized　algorithm.　The　study　included　correlation　assessment　and　reliability　evaluation.　Box　plot　and　Bland-Altman　plot　were　used　to　visualize　the　impact　of　pressure　levels　on　CRTs.　Results:　A　dataset　of　1414　CRTs　across　21　pressures　showed　significant　differences　(Kruskal-Wallis　test,　p　＜　0.0001),　highlighting　the　impact　of　pressure　on　CRT.　CRT　values　between　4.5N　and　10.5N　pressures　varied　less,　with　an　Intraclass　Correlation　Coefficient　(ICC)　of　0.499　indicating　moderate　consistency.　Notably,　CRTs　at　10N　and　10.5N　pressures　revealed　a　high　ICC　of　0.790,　suggesting　strong　agreement.　Conclusion:　A　pressure　range　of　4.5N-10.5N　is　recommended　for　stable　CRT　measurements,　with　10.0N-10.5N　providing　optimal　consistency　and　reliability.