Port-site metastases
Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2}...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Tseng, L. N. L. [verfasserIn] Berends, F. J. [verfasserIn] Wittich, Ph. [verfasserIn] Bouvy, N. D. [verfasserIn] Marquet, R. L. [verfasserIn] Kazemier, G. [verfasserIn] Bonjer, H. J. [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
1998 |
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| Übergeordnetes Werk: |
Enthalten in: Surgical endoscopy and other interventional techniques - New York, NY : Springer, 1987, 12(1998), 12 vom: Dez., Seite 1377-1380 |
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| Übergeordnetes Werk: |
volume:12 ; year:1998 ; number:12 ; month:12 ; pages:1377-1380 |
| Links: |
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| DOI / URN: |
10.1007/s004649900862 |
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SPR00622900X |
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| 520 | |a Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. | ||
| 700 | 1 | |a Berends, F. J. |e verfasserin |4 aut | |
| 700 | 1 | |a Wittich, Ph. |e verfasserin |4 aut | |
| 700 | 1 | |a Bouvy, N. D. |e verfasserin |4 aut | |
| 700 | 1 | |a Marquet, R. L. |e verfasserin |4 aut | |
| 700 | 1 | |a Kazemier, G. |e verfasserin |4 aut | |
| 700 | 1 | |a Bonjer, H. J. |e verfasserin |4 aut | |
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10.1007/s004649900862 doi (DE-627)SPR00622900X (SPR)s004649900862-e DE-627 ger DE-627 rakwb eng 610 ASE 610 ASE 44.87 bkl Tseng, L. N. L. verfasserin aut Port-site metastases 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. Berends, F. J. verfasserin aut Wittich, Ph. verfasserin aut Bouvy, N. D. verfasserin aut Marquet, R. L. verfasserin aut Kazemier, G. verfasserin aut Bonjer, H. J. verfasserin aut Enthalten in Surgical endoscopy and other interventional techniques New York, NY : Springer, 1987 12(1998), 12 vom: Dez., Seite 1377-1380 (DE-627)254909620 (DE-600)1463171-4 1432-2218 nnns volume:12 year:1998 number:12 month:12 pages:1377-1380 https://dx.doi.org/10.1007/s004649900862 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_121 GBV_ILN_150 GBV_ILN_267 GBV_ILN_374 GBV_ILN_711 GBV_ILN_2007 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2118 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2472 GBV_ILN_4125 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4700 44.87 ASE AR 12 1998 12 12 1377-1380 |
| spelling |
10.1007/s004649900862 doi (DE-627)SPR00622900X (SPR)s004649900862-e DE-627 ger DE-627 rakwb eng 610 ASE 610 ASE 44.87 bkl Tseng, L. N. L. verfasserin aut Port-site metastases 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. Berends, F. J. verfasserin aut Wittich, Ph. verfasserin aut Bouvy, N. D. verfasserin aut Marquet, R. L. verfasserin aut Kazemier, G. verfasserin aut Bonjer, H. J. verfasserin aut Enthalten in Surgical endoscopy and other interventional techniques New York, NY : Springer, 1987 12(1998), 12 vom: Dez., Seite 1377-1380 (DE-627)254909620 (DE-600)1463171-4 1432-2218 nnns volume:12 year:1998 number:12 month:12 pages:1377-1380 https://dx.doi.org/10.1007/s004649900862 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_121 GBV_ILN_150 GBV_ILN_267 GBV_ILN_374 GBV_ILN_711 GBV_ILN_2007 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2118 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2472 GBV_ILN_4125 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4700 44.87 ASE AR 12 1998 12 12 1377-1380 |
| allfields_unstemmed |
10.1007/s004649900862 doi (DE-627)SPR00622900X (SPR)s004649900862-e DE-627 ger DE-627 rakwb eng 610 ASE 610 ASE 44.87 bkl Tseng, L. N. L. verfasserin aut Port-site metastases 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. Berends, F. J. verfasserin aut Wittich, Ph. verfasserin aut Bouvy, N. D. verfasserin aut Marquet, R. L. verfasserin aut Kazemier, G. verfasserin aut Bonjer, H. J. verfasserin aut Enthalten in Surgical endoscopy and other interventional techniques New York, NY : Springer, 1987 12(1998), 12 vom: Dez., Seite 1377-1380 (DE-627)254909620 (DE-600)1463171-4 1432-2218 nnns volume:12 year:1998 number:12 month:12 pages:1377-1380 https://dx.doi.org/10.1007/s004649900862 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_121 GBV_ILN_150 GBV_ILN_267 GBV_ILN_374 GBV_ILN_711 GBV_ILN_2007 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2118 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2472 GBV_ILN_4125 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4700 44.87 ASE AR 12 1998 12 12 1377-1380 |
| allfieldsGer |
10.1007/s004649900862 doi (DE-627)SPR00622900X (SPR)s004649900862-e DE-627 ger DE-627 rakwb eng 610 ASE 610 ASE 44.87 bkl Tseng, L. N. L. verfasserin aut Port-site metastases 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. Berends, F. J. verfasserin aut Wittich, Ph. verfasserin aut Bouvy, N. D. verfasserin aut Marquet, R. L. verfasserin aut Kazemier, G. verfasserin aut Bonjer, H. J. verfasserin aut Enthalten in Surgical endoscopy and other interventional techniques New York, NY : Springer, 1987 12(1998), 12 vom: Dez., Seite 1377-1380 (DE-627)254909620 (DE-600)1463171-4 1432-2218 nnns volume:12 year:1998 number:12 month:12 pages:1377-1380 https://dx.doi.org/10.1007/s004649900862 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_121 GBV_ILN_150 GBV_ILN_267 GBV_ILN_374 GBV_ILN_711 GBV_ILN_2007 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2118 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2472 GBV_ILN_4125 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4700 44.87 ASE AR 12 1998 12 12 1377-1380 |
| allfieldsSound |
10.1007/s004649900862 doi (DE-627)SPR00622900X (SPR)s004649900862-e DE-627 ger DE-627 rakwb eng 610 ASE 610 ASE 44.87 bkl Tseng, L. N. L. verfasserin aut Port-site metastases 1998 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. Berends, F. J. verfasserin aut Wittich, Ph. verfasserin aut Bouvy, N. D. verfasserin aut Marquet, R. L. verfasserin aut Kazemier, G. verfasserin aut Bonjer, H. J. verfasserin aut Enthalten in Surgical endoscopy and other interventional techniques New York, NY : Springer, 1987 12(1998), 12 vom: Dez., Seite 1377-1380 (DE-627)254909620 (DE-600)1463171-4 1432-2218 nnns volume:12 year:1998 number:12 month:12 pages:1377-1380 https://dx.doi.org/10.1007/s004649900862 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_121 GBV_ILN_150 GBV_ILN_267 GBV_ILN_374 GBV_ILN_711 GBV_ILN_2007 GBV_ILN_2014 GBV_ILN_2088 GBV_ILN_2118 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2446 GBV_ILN_2472 GBV_ILN_4125 GBV_ILN_4246 GBV_ILN_4305 GBV_ILN_4700 44.87 ASE AR 12 1998 12 12 1377-1380 |
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Enthalten in Surgical endoscopy and other interventional techniques 12(1998), 12 vom: Dez., Seite 1377-1380 volume:12 year:1998 number:12 month:12 pages:1377-1380 |
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Tseng, L. N. L. @@aut@@ Berends, F. J. @@aut@@ Wittich, Ph. @@aut@@ Bouvy, N. D. @@aut@@ Marquet, R. L. @@aut@@ Kazemier, G. @@aut@@ Bonjer, H. J. @@aut@@ |
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N. L.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Port-site metastases</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">1998</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites.</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Berends, F. 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Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. |
| abstractGer |
Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. |
| abstract_unstemmed |
Abstract Background: Port-site metastases after laparoscopic procedures in patients with digestive malignancies have evoked concern. The pathogenesis of port-site metastases remains unclear. Two experiments in rats were performed to determine the impact of both tissue trauma and leakage of $ CO_{2} $ along trocars (chimney effect) in the development of port-site metastases. Methods: Experiment I: Ten WAG rats had four 5-mm incisions in all abdominal quadrants. The incisions on the right side were crushed to induce tissue trauma. After inserting 5-mm trocars in all incisions, a pneumoperitoneum was created, and CC-531 tumor cells were injected intraperitoneally. $ CO_{2} $ was insufflated for 20 min. Experiment II: Ten WAG rats had 5-mm incisions in the left and right abdominal upper quadrant. A 5-mm trocar was inserted in the incision in the left upper quadrant, and a 2-mm trocar was inserted in the incision in the right upper quadrant. After insufflating the abdomen, CC-531 tumor cells were injected intraperitoneally. Total leakage of $ CO_{2} $ along the trocar in the right quadrant was 10 liters. After 4 weeks, in both experiments, the tumor deposits at the trocar sites were assessed. Statistical analysis was performed by the Wilcoxon matched-pairs test. Results: Experiment I: The median weight of tumor deposits at the trocar sites without induced tissue trauma was 22 mg. At the traumatic port sites, median weight of tumor deposits was 316 mg (p= 0.007). Experiment II: The median weight of tumor deposits at the leaking trocar sites was 478 mg and at the control sites 153 mg (p= 0.009). Conclusion: Tissue trauma at trocar sites and leakage of $ CO_{2} $ along a trocar appear to promote implantation and growth of tumor cells at port sites. |
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