Introduction
Methods
Nomenclature
Patient population
Operative technique
Data collection
Outcome measures
Statistical analysis
Results
Range/frequency | Mean | Test and significance | |
---|---|---|---|
Patient characteristic | |||
Age (years) | 34–86 | 67.18 | - |
Sex | |||
Male | 21 (42%) | - | χ2 = 1.28; p = 0.2579 |
Female | 29 (58%) | ||
Side | |||
Right | 29 (58%) | - | χ2 = 1.28; p = 0.2579 |
Left | 21 (42%) | ||
MRI characteristic | |||
Thickness (mm) | 0.4–1.5 | 0.99 | - |
Distance (mm)1 | 0.4-0.7 | 0.54 | - |
Pixel bandwidth2 (Hz/pixel) | 130–462 | 339 | - |
Tesla3 | |||
1.5 | 22 (44.9%) | - | |
3 | 27 (55.1%) | ||
Sequence4 | |||
bFFE MRI | 28 (56%) | ||
3D CISS MRI | 21 (42%) | ||
FIESTA MRI | 1 (2%) |
SPVC anatomy in bFFE and intraoperatively
Main SPV(s)
Vein of the cerebellopontine fissure
Vein of the middle cerebellar peduncle
Pontotrigeminal vein
Petrosal-galenic anastomosis via the PTv
Petrosal-galenic anastomosis | Prevelance (n = 50) |
---|---|
Present | 38% (19) |
Absent | 18% (9) |
Non-assessable | 26% (13) |
Inadequate bFFE1 | 13 of 13 |
PTv absent | 16% (8) |
PTv not part of the SPVC | 2% (1) |
Transverse pontine vein
Anterior lateral marginal vein
Individual variations of the SPVC
Number of tributaries in an SPVC | Prevalence | Presence of a vein compressing the TGN | Number of disturbing tributaries in an SPVC | Prevalence |
---|---|---|---|---|
1 | 1 (2%) | 0 | 1 | 11 (22%) |
2 | 12 (24%) | 1* | 2 | 21 (42%) |
3 | 21 (42%) | 71 | 3 | 10 (20%) |
4 | 13 (26%) | 4 | 4 | 3 (6%) |
5 | 2 (4%) | 2* | 5 | 0 |
0 | 5 (10%) | |||
Total | 50 cases | 14 of 50 cases | Total | 50 cases |
Tributary veins | Prevalence (% from 50 cases) | Doubled tributaries (% from 50 cases) | Disturbing the operative field (% from 50 cases) | Compressing the TGN (% from 50 cases) |
---|---|---|---|---|
v.CPF | 43 (86%) | 0 | 34 (68%) | 3 (6%) |
PTv | 40 (80%) | 7 (14%) | 33 (66%) | 2 (4%) |
v.MCP | 25 (50%) | - | 13 (26%) | 2 (4%) |
TPv | 25 (50%) | 1 (2%) | 6 (12%) | 7 (14%) |
ALMv | 20 (40%) | 1 (2%) | 11 (22%) | - |
Total | 153 tributaries | 9 veins in 8 cases | 14 veins in 13 cases1 |
Number of SPVs (number of patients) | General configuration1 (number of patients) | Individual variation | Number of patients | |
---|---|---|---|---|
1 (32) | 1.1 (1) | 1.1.1 | SPV: TPv | 1 |
1.2 (10) | 1.2.1 | SPV: v.CPF + PTv | 5 | |
1.2.2 | SPV: v.CPF + TPv | 2 | ||
1.2.3 | SPV: v.CPF + v.MCP | 1 | ||
1.2.4 | SPV: v.CPF + v.ALM | 1 | ||
1.2.5 | SPV: PTv + v.MCP | 1 | ||
1.3 (12) | 1.3.1 | SPV 1: v.CPF + PTv + TPv | 2 | |
1.3.2 | SPV 1: v.CPF + PTv + v.MCP | 3 | ||
1.3.3 | SPV 1: v.CPF + PTv + ALMv | 1 | ||
1.3.4 | SPV 1: v.CPF + TPv + v.MCP | 2 | ||
1.3.5 | SPV 1: PTv + TPv + ALMv | 1 | ||
1.3.6 | SPV 1: PTv + v.MCP + ALMv | 3 | ||
1.4 (9) | 1.4.1 | SPV 1: v.CPF + PTv + TPv + v.MCP | 2 | |
1.4.2 | SPV 1: v.CPF + PTv + TPv + ALMv | 5 | ||
1.4.3 | SPV 1: v.CPF + PTv + v.MCP + ALMv | 2 | ||
2 (16) | 2.2 (2) | 2.2.1 | SPV 1: v.CPF SPV 2: TPv | 1 |
2.2.1 | SPV 1: v.CPF SPV 2: ALMv | 1 | ||
2.3 (9) | 2.3.12 | SPV 1: PTv1 SPV 2: v.CPF + PTv2 | 1 | |
2.3.2 | SPV 1: PTv SPV 2: v.CPF + v.MCP | 1 | ||
2.3.3 | SPV 1: TPv SPV 2: v.CPF + PTv | 4 | ||
2.3.4 | SPV 1: TPv SPV 2: v.CPF + ALMv | 1 | ||
2.3.5 | SPV 1: v.MCP SPV 2: v.CPF + PTv | 2 | ||
2.4 (3) | 2.4.1 | SPV 1: v.CPF SPV 2: PTv + v.MCP + ALMv | 1 | |
2.4.2 | SPV 1: PTv SPV 2: v.CPF + v.MCP + ALMv | 1 | ||
2.4.3 | SPV 1: TPv SPV 2: v.CPF + PTv + ALMv | 1 | ||
2.5 (2) | 2.5.2 | SPV 1: ALMv SPV 2: v.CPF + PTv + TPv + v.MCP | 1 | |
2.5.21 | SPV 1: PTv + ALMv SPV 2: v.CPF + TPv + v.MCP | 1 | ||
3 (2) | 3.3 (1) | 3.3.1 | SPV 1: v.CPF SPV 2: PTv SPV 3: v.MCP | 1 |
3.4 (1) | 3.4.1 | SPV 1: TPv SPV 2: v.MCP SPV 3: PTv + ALMv | 1 |