The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosis
BackgroundAchieving optimal optical coherence tomography (OCT) imaging in patients with severe coronary stenosis is challenging because of the catheter-induced restriction of distal contrast flushing within the lesion.AimsTo evaluate the effectiveness of manual contrast injection followed by OCT cat...
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Frontiers Media S.A.
2025-07-01
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| Series: | Frontiers in Cardiovascular Medicine |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fcvm.2025.1621424/full |
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| author | Jincheng Guo Saiying He Jia Zhou Hao Liu Zixuan Li Zijing Liu Senhu Wang Haotian Wang |
| author_facet | Jincheng Guo Saiying He Jia Zhou Hao Liu Zixuan Li Zijing Liu Senhu Wang Haotian Wang |
| author_sort | Jincheng Guo |
| collection | DOAJ |
| description | BackgroundAchieving optimal optical coherence tomography (OCT) imaging in patients with severe coronary stenosis is challenging because of the catheter-induced restriction of distal contrast flushing within the lesion.AimsTo evaluate the effectiveness of manual contrast injection followed by OCT catheter advancement in improving image clarity in patients with severe coronary stenosis.MethodsThis single-centre observational study included 60 patients with acute coronary syndrome who demonstrated antegrade thrombolysis in myocardial infarction (TIMI) flow ≥2 on coronary angiography before the OCT catheter was passed through the severe coronary lesions. Catheter advancement resulted in TIMI 0–1 flow. A 7-step “P” technique was developed and implemented to optimise OCT imaging clarity, using manual contrast injection followed by catheter advancement distal to the region of interest (ROI). Image quality was evaluated using a semi-quantitative scoring system to assess the number of quadrants (0–4) in which the vessel walls were clearly visualised.ResultsA total of 1,722 OCT frames were meticulously analysed, with a mean ROI length of 18.99 ± 8.82 mm. This technique consistently produced high-quality images with an average quality score of 3.88 ± 0.38. The proximal lesion segment generally showed a slightly higher image quality compared to the distal segment, with both regions achieving reasonably high clarity scores (3.90 ± 0.28 vs. 3.85 ± 0.45, p < 0.001), though the clinical relevance of this difference is minimal. No complications occurred.ConclusionsThe 7-step “P” technique with manual injection is a safe and effective method for acquiring high-quality OCT images in patients with severe coronary artery stenosis, offering a practical alternative in clinical practice. |
| format | Article |
| id | doaj-art-e6067c2a10dc4f68aede3c3e08add7fc |
| institution | Kabale University |
| issn | 2297-055X |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Cardiovascular Medicine |
| spelling | doaj-art-e6067c2a10dc4f68aede3c3e08add7fc2025-08-20T03:31:38ZengFrontiers Media S.A.Frontiers in Cardiovascular Medicine2297-055X2025-07-011210.3389/fcvm.2025.16214241621424The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosisJincheng Guo0Saiying He1Jia Zhou2Hao Liu3Zixuan Li4Zijing Liu5Senhu Wang6Haotian Wang7Department of Cardiology, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaDepartment of Cardiology, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaDepartment of Cardiology, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaDepartment of Cardiology, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaDepartment of Cardiology, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaDepartment of Cardiology, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaEmergency Department, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaEmergency Department, Beijing Luhe Hospital, Capital Medical University, Beijing, ChinaBackgroundAchieving optimal optical coherence tomography (OCT) imaging in patients with severe coronary stenosis is challenging because of the catheter-induced restriction of distal contrast flushing within the lesion.AimsTo evaluate the effectiveness of manual contrast injection followed by OCT catheter advancement in improving image clarity in patients with severe coronary stenosis.MethodsThis single-centre observational study included 60 patients with acute coronary syndrome who demonstrated antegrade thrombolysis in myocardial infarction (TIMI) flow ≥2 on coronary angiography before the OCT catheter was passed through the severe coronary lesions. Catheter advancement resulted in TIMI 0–1 flow. A 7-step “P” technique was developed and implemented to optimise OCT imaging clarity, using manual contrast injection followed by catheter advancement distal to the region of interest (ROI). Image quality was evaluated using a semi-quantitative scoring system to assess the number of quadrants (0–4) in which the vessel walls were clearly visualised.ResultsA total of 1,722 OCT frames were meticulously analysed, with a mean ROI length of 18.99 ± 8.82 mm. This technique consistently produced high-quality images with an average quality score of 3.88 ± 0.38. The proximal lesion segment generally showed a slightly higher image quality compared to the distal segment, with both regions achieving reasonably high clarity scores (3.90 ± 0.28 vs. 3.85 ± 0.45, p < 0.001), though the clinical relevance of this difference is minimal. No complications occurred.ConclusionsThe 7-step “P” technique with manual injection is a safe and effective method for acquiring high-quality OCT images in patients with severe coronary artery stenosis, offering a practical alternative in clinical practice.https://www.frontiersin.org/articles/10.3389/fcvm.2025.1621424/fullcatheterizationcontrast injectionoptical coherence tomographystenosisacute coronary syndrome (ACS)percutaneous coronary intervention (PCI) |
| spellingShingle | Jincheng Guo Saiying He Jia Zhou Hao Liu Zixuan Li Zijing Liu Senhu Wang Haotian Wang The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosis Frontiers in Cardiovascular Medicine catheterization contrast injection optical coherence tomography stenosis acute coronary syndrome (ACS) percutaneous coronary intervention (PCI) |
| title | The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosis |
| title_full | The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosis |
| title_fullStr | The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosis |
| title_full_unstemmed | The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosis |
| title_short | The 7-step “P” technique: a novel manual push method for high-quality OCT imaging in severe coronary stenosis |
| title_sort | 7 step p technique a novel manual push method for high quality oct imaging in severe coronary stenosis |
| topic | catheterization contrast injection optical coherence tomography stenosis acute coronary syndrome (ACS) percutaneous coronary intervention (PCI) |
| url | https://www.frontiersin.org/articles/10.3389/fcvm.2025.1621424/full |
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