Ulnar nerve transposition in the hand: a cadaveric study

2018 ◽  
Vol 44 (3) ◽  
pp. 269-272
Author(s):  
Steven Beldner ◽  
Remy V. Rabinovich ◽  
Daniel B. Polatsch ◽  
Derek M. Gonzalez
Keyword(s):  
Ulnar Nerve ◽  
Average Length ◽  
Primary Repair ◽  
Cadaveric Study ◽  
Segmental Defect ◽  
Motor Branch ◽  
Gap Closure ◽  
Before And After ◽  
Free Environment ◽  
Nerve Transposition

Primary repair of a nerve is preferable over nerve grafting when a tension-free environment can be achieved. The purpose of this cadaveric study was to evaluate the facility of nerve-gap closure gained by removing the hamate hook, eliminating the circuitous path of the motor branch of the ulnar nerve in the hand. Six cadaveric specimens were dissected and the length of the motor branch coursing through Guyon’s canal before and after hamate hook excision and nerve transposition was recorded. Average length was significantly shorter in specimens after transposition, with a mean 21% reduction relative to the nerve’s original course. This knowledge may help guide surgeons on whether excision of the hamate hook will allow for primary repair of the nerve when a segmental defect or retraction and scarring of the nerve stumps is encountered.

Interfascicular Anatomy of the Motor Branch of the Ulnar Nerve: A Cadaveric Study

2021 ◽  
Author(s):  
Spencer B. Chambers ◽  
Kitty Yuechuan Wu ◽  
Corey Smith ◽  
Robert Potra ◽  
Louis M. Ferreira ◽  
...  
Keyword(s):  
Ulnar Nerve ◽  
Cadaveric Study ◽  
Motor Branch

The effect of in-situ decompression on ulnar nerve stability: a cadaveric study

2017 ◽  
Vol 42 (7) ◽  
pp. 715-719 ◽  
Author(s):  
B. Butler ◽  
J. Peelman ◽  
L.-Q. Zhang ◽  
M. Kwasny ◽  
D. Nagle
Keyword(s):  
Ulnar Nerve ◽  
Medial Epicondyle ◽  
Cadaveric Study ◽  
Flexion Angle ◽  
Anterior Translation ◽  
Nerve Decompression ◽  
Flexor Carpi Ulnaris ◽  
Before And After ◽  
Fresh Frozen

Ten fresh frozen right cadaver arms were placed in a motorized jig and an in-situ ulnar nerve decompression was performed in 5 mm increments distally to the flexor carpi ulnaris (FCU) aponeurosis then proximally to the intermuscular septum. The elbows were ranged 0–135° after each incremental decompression and the ulnar nerve to medial epicodyle distance was measured to assess for nerve translation/subluxation compared with baseline (prerelease) values. None of the specimens had ulnar nerve subluxation (defined as anterior translation past the medial epicondyle) even after full decompression. Furthermore, there were no statistically significant ulnar nerve translations (defined as any difference in distance from ulnar nerve to medial epicondyle before and after each decompression) for any flexion angle or extent of decompression. This study provides biomechanical evidence that in situ ulnar nerve decompression from the FCU aponeurosis to the intermuscular septum does not result in significant ulnar nerve translation or subluxation.

Cranial translation of the elevated prepuce in dogs before and after two modifications: A cadaveric study

2021 ◽  
Author(s):  
Christos Yiapanis ◽  
Raya Atamna ◽  
Mirit Gan El ◽  
Anna Shipov ◽  
Tryfon Chochlios ◽  
...  
Keyword(s):  
Cadaveric Study ◽  
Before And After

scholarly journals More skilled clinical management of COVID-19 patients modified mortality in an intermediate respiratory intensive care unit in Italy

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Giovanna E. Carpagnano ◽  
Giovanni Migliore ◽  
Salvatore Grasso ◽  
Vito Procacci ◽  
Emanuela Resta ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Severe Acute Respiratory Syndrome ◽  
Clinical Management ◽  
Average Length ◽  
Limited Attention ◽  
Average Length Of Stay ◽  
Before And After ◽  
Respiratory Intensive Care Unit ◽  
Transferred Patients

Abstract Background Some studies investigated epidemiological and clinical features of laboratory-confirmed patients with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) the virus causing coronavirus disease 2019 (COVID-19), but limited attention has been paid to the follow-up of hospitalized patients on the basis of clinical setting and the expertise of clinical management. Methods In the present single-centered, retrospective, observational study, we reported findings from 87 consecutive laboratory-confirmed COVID-19 patients with moderate-to-severe acute respiratory syndrome hospitalized in an intermediate Respiratory Intensive Care Unit (RICU), subdividing the patients in two groups according to the admission date (before and after March 29, 2020). Results With improved skills in the clinical management of COVID-19, we observed a significant lower mortality in the T2 group compared with the T1 group and a significantly difference in terms of mortality among the patients transferred in Intensive Care Unit (ICU) from our intermediate RICU (100% in T1 group vs. 33.3% in T2 group). The average length of stay in intermediate RICU of ICU-transferred patients who survived in T1 and T2 was significantly longer than those who died (who died 3.3 ± 2.8 days vs. who survived 6.4 ± 3.3 days). T Conclusions The present findings suggested that an intermediate level of hospital care may have the potential to modify survival in COVID-19 patients, particularly in the present phase of a more skilled clinical management of the pandemic.

Compression of the Distal Ulnar Nerve with Clawing of the Index Finger

HAND ◽  
1982 ◽  
Vol os-14 (1) ◽  
pp. 38-40 ◽  
Author(s):  
N. P. Packer ◽  
G. R. Fisk
Keyword(s):  
Ulnar Nerve ◽  
Distal Part ◽  
Similar Case ◽  
Index Finger ◽  
Motor Branch

A compression lesion of the distal part of the terminal motor branch of the ulnar nerve is presented. One similar case has been previously described (McDowell, 1977) but some unusual features are recorded here. The reported clinical varieties of lesions of the ulnar nerve in the hand are listed (Table 1).

Distal nerve transfer from the median nerve lumbrical fibers to the distal ulnar nerve motor branches in the palm: An anatomical cadaveric study

Microsurgery ◽  
2018 ◽  
Vol 39 (5) ◽  
pp. 434-440
Author(s):  
Michele R. Colonna ◽  
Davide Pino ◽  
Bruno Battiston ◽  
Francesco Stagno d'Alcontres ◽  
Konstantinos Natsis ◽  
...  
Keyword(s):  
Median Nerve ◽  
Ulnar Nerve ◽  
Nerve Transfer ◽  
Cadaveric Study ◽  
Distal Nerve

scholarly journals Performance and Return to Sport Following Ulnar Nerve Transposition/Decompression in Professional Baseball Players

2018 ◽  
Vol 6 (7_suppl4) ◽  
pp. 2325967118S0016
Author(s):  
Brandon J. Erickson ◽  
Peter Nissen Chalmers ◽  
John D’Angelo ◽  
Kevin Ma ◽  
Anthony A. Romeo
Keyword(s):  
Ulnar Nerve ◽  
Performance Metrics ◽  
Return To Sport ◽  
Professional Baseball ◽  
Baseball Players ◽  
Nerve Decompression ◽  
Ulnar Nerve Transposition ◽  
Significant Difference ◽  
And Performance ◽  
Nerve Transposition

Background: Isolated ulnar nerve decompression/transposition is an uncommon surgery amongst professional baseball players. Purpose: To determine the rate of return to sport (RTS) and performance upon RTS in professional baseball players following isolated ulnar nerve decompression/transposition, including those who required an ulnar nerve transposition/decompression following ulnar collateral ligament reconstruction (UCLR), and to determine if outcomes differ between players with isolated ulnar nerve decompression/transposition and matched controls. Hypothesis: There is a high rate of RTS in professional baseball players undergoing isolated ulnar nerve decompression/transposition with no significant difference in RTS rate or performance (specifically related to the primary outcome performance variables of earned run average (ERA), WHIP ((walks +hits)/innings pitched), wins above replacement (WAR), and on base + slugging percentage (OPS)) between cases and controls. Methods: All professional baseball players who underwent isolated ulnar nerve decompression/transposition between 2010-2016 were included. Demographic and performance data (pre and post surgery) for each player was recorded. Performance metrics were then compared between cases and a group of matched controls. Results: Overall 52 players, 83% pitchers (14 who underwent prior UCLR) were included. Most surgeries (92%) were anterior subcutaneous transpositions. Overall, 62% of players were able to successfully RTS and 56% returned to the same or a higher level. There was no significant difference between cases and controls in the majority of performance metrics pre-operative or post-operatively, specifically ERA, WHIP, WAR, and OPS. When players who had a UCLR prior to their ulnar nerve transposition/decompression were compared to controls with a history of a UCLR but who did not go on to have an ulnar nerve transposition/decompression, the only performance difference of all the recorded metrics was cases allowed more walks per 9 innings (4.4 vs. 2.8; p=0.011). Conclusion: Anterior subcutaneous transposition is the most common surgery in professional baseball players to address ulnar nerve compression. Players have a 62% rate of RTS. Upon RTS, players performance compared to matched controls remains the same in the majority of performance metrics including ERA, WHIP, WAR, and OPS. Post-operatively, pitchers with a UCLR prior to ulnar nerve transposition/decompression performed the same as matched controls with prior UCLR.

scholarly journals Toxicity assessment of pickling liquors containing TiF₃, HF and HCl before and after neutralization using a phytotesting method

2017 ◽  
Vol 6 (2) ◽  
pp. 24-27
Author(s):  
Nikolay Alekseevich Bykovsky ◽  
Timur Zulfukarovich Zabirov ◽  
Inna Vyacheslavovna Ovsyannikova ◽  
Lyudmila Nikolaevna Puchkova ◽  
Nadezhda Nikolaevna Fanakova
Keyword(s):  
Dilution Rate ◽  
Average Length ◽  
Ground Surface ◽  
Dry Weight ◽  
Sewage Water ◽  
Toxicity Assessment ◽  
Rate Equations ◽  
Lepidium Sativum ◽  
Before And After ◽  
Acute Toxic Effect

The paper evaluates the toxicity of spent acid pickling liquor (SAPL) formed in the production of titanium products during its etching with a mixture of hydrofluoric and hydrochloric acids. The SAPL contained TiF₃, HF and HCl in the amounts of 21,9 g/l, 1,7 g/l and 6,2 g/l, respectively. To determine the toxicity of SAPL, a phytotesting method was used. As a phytoecological indicator, cress of Zabava variety was used. The experiment was carried out according to the procedure for determining the toxicity of drinking, ground, surface and sewage water; the toxicity of chemical solutions by measuring the germination index, average length and average dry weight of seed germs of cress (Lepidium sativum). The toxicity of the SAPL was determined before and after neutralizing with alkali. It has been shown that SAPL has an acute toxic effect both before and after its neutralization by alkali. To determine a safe dilution rate, the influence of SAPL dilution on seed germination, average length and average dry weight of the seedlings was studied. It was found that the seedlings average length-dilution rate equations most reliably describe the experimental findings. The safe dilution rate calculated from these relations is 669,2 for non-neutralized SAPL and 382,5 for alkaline neutralized SAPL.

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