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Matz et al: Ex vivo comparison of different thoracoabdominal stapler sizes for typhlectomy in canine cadavers
Veterinary Surgery 4, 2022

🔍 Key Findings

  • No significant difference in initial leak pressure (ILP) among TA 30 V3 2.5 mm, TA 60 3.5 mm, and TA 60 4.8 mm stapler sizes (P = .78).
  • All stapler types exceeded the physiological intraluminal pressure threshold (~25 mmHg), suggesting acceptable leak resistance.
  • Mean ILPs: TA 30 V3 (181.5 mmHg), TA 60 3.5 mm (112 mmHg), TA 60 4.8 mm (77.2 mmHg).
  • Leakage occurred at the staple line in 23 of 24 specimens; only one had ileal wall rupture.
  • No correlation found between ILP and cadaver weight, cecal wall thickness, or cecal length.
  • Cecal wall thickness averaged 4.9 mm, yet staple heights ranged only from 1.0–2.0 mm.
  • One specimen in each TA 60 group leaked near or below physiologic pressures, suggesting rare outliers.
  • Study supports clinical viability of all tested stapler sizes for canine typhlectomy, but highlights need for in vivo data on healing and complications.

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← Articles

Matz et al: Ex vivo comparison of different thoracoabdominal stapler sizes for typhlectomy in canine cadavers
Veterinary Surgery 4, 2022

🔍 Key Findings

  • No significant difference in initial leak pressure (ILP) among TA 30 V3 2.5 mm, TA 60 3.5 mm, and TA 60 4.8 mm stapler sizes (P = .78).
  • All stapler types exceeded the physiological intraluminal pressure threshold (~25 mmHg), suggesting acceptable leak resistance.
  • Mean ILPs: TA 30 V3 (181.5 mmHg), TA 60 3.5 mm (112 mmHg), TA 60 4.8 mm (77.2 mmHg).
  • Leakage occurred at the staple line in 23 of 24 specimens; only one had ileal wall rupture.
  • No correlation found between ILP and cadaver weight, cecal wall thickness, or cecal length.
  • Cecal wall thickness averaged 4.9 mm, yet staple heights ranged only from 1.0–2.0 mm.
  • One specimen in each TA 60 group leaked near or below physiologic pressures, suggesting rare outliers.
  • Study supports clinical viability of all tested stapler sizes for canine typhlectomy, but highlights need for in vivo data on healing and complications.

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Multiple Choice Questions on this study

In Matz 2022 et al., on stapler size comparison, which of the following factors was NOT significantly associated with ILP?

A. Stapler size
B. Cecal base thickness
C. Cecal base length
D. Cadaver weight
E. All of the above

Answer: All of the above

Explanation: No significant correlation was found between ILP and any of these variables (P > .05).
In Matz 2022 et al., on stapler size comparison, which stapler group had the highest mean initial leak pressure (ILP)?

A. TA 60 4.8 mm
B. TA 60 3.5 mm
C. TA 30 V3 2.5 mm
D. All had equal ILP
E. GIA 3.8 mm

Answer: TA 30 V3 2.5 mm

Explanation: TA 30 V3 had the highest ILP at 181.5 mmHg, though differences were not statistically significant.
In Matz 2022 et al., on stapler size comparison, what was the primary location of leakage observed in nearly all specimens?

A. At the ileocolic junction
B. At the staple line
C. Through the ileal wall
D. Through a scalpel incision
E. At the oversewn site

Answer: At the staple line

Explanation: Leakage was noted at the staple line in 23 of 24 specimens, supporting its primary role in integrity testing.
In Matz 2022 et al., on stapler size comparison, what did the authors conclude about the clinical use of the evaluated staplers?

A. Only TA 30 should be used
B. Only TA 60 4.8 mm is safe
C. All tested staplers are acceptable for similar dogs
D. Stapler choice depends on body weight
E. None of the staplers are reliable

Answer: All tested staplers are acceptable for similar dogs

Explanation: All three tested stapler types produced acceptable ILP values, suggesting they are viable options for typhlectomy in similarly sized dogs.
In Matz 2022 et al., on stapler size comparison, what is the clinical significance of the finding that all stapler groups had ILPs exceeding 25 mmHg?

A. They are safe for use in humans
B. They require oversewing for security
C. They exceed normal intraluminal pressures in dogs
D. They reduce the need for antibiotics post-op
E. They ensure no leakage occurs

Answer: They exceed normal intraluminal pressures in dogs

Explanation: The study used 25 mmHg as a reference threshold; all stapler groups exceeded this, suggesting functional closure under physiological conditions.

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