Comparative Analysis of Frequency and Structure of Complications after Various Options of Tracheostomy

The article presents a new technique developed by RSCS named after acad. V. Vakhidov for performing percutaneous dilatational tracheostomy by using the improved Howard-Kelly forceps, which ensures stable traction of the guidewire and reduces the risk of trauma to surrounding tissues. In order to assess the feasibility and necessity of carrying out a modified method of tracheostomy, a comparative analysis of the frequency and structure of complications after various options for tracheostomy was carried out, taking into account the presence or absence of risk factors for an adverse outcome.

To date, there are numerous methods of percutaneous dilated tracheostomy (PDT), however, the advantages of any method are questionable, since each of them has its own technical difficulties, which requires further improvement [4] [5] [6].
In a recent issue of Critical Care, Simon M. where colleagues present a systematic review of risk factors vital complications of PDT, which coincides with the opinion of a large number of researchers "…this procedure is for high-risk" in connection with which the search continues for the proposals to improve the safety of tracheostomy patients on PALV [1] [2].
In this regard, in this Chapter, we have presented the improved methods of standard dilational tracheostomy developed at the RSCS named after acad. Vakhidov, the priority of these methods was not only to achieve maximum safety of the procedure, but also to avoid subsequent complications, such as bleeding and cicatrical stenosis of the trachea.
In this regard, we have developed the author's models (utility model #1 and #2) modification of the Howard-Kelly forceps for PDT.

Advanced Versions of the Instrument for Performing Percutaneous Dilatational Tracheostomy
The purpose of developing the modified forceps was to simplify and improve usability. To solve this goal, we have proposed a forceps for clamping and holding organs and tissues during tracheostomy, containing branchlets with kremallera and working sponges with longitudinal grooves along the width of the sponges and applying mesh knurling on the side surfaces of the working sponges, with grooves in the working sponges, and in the longitudinal groove of the second working sponge, a side hole is made for conducting a guidewire.
Comparative analysis with the prototype (Howard-Kelly forceps) showed that the claimed device differs from the known one in that the working sponges have grooves, and in the longitudinal groove of the second working sponge, a side hole is made for conducting the guidewire. These distinctive features allow us to draw a conclusion about the novelty of the technical solution. Performing grooves in the working sponges and placing the first working sponge of the conductor-string in the longitudinal groove makes it easier to insert and directs the guidewire in the desired direction during tracheostomy. Performing a side hole on the longitudinal groove of the second working sponge makes it easier to use when fixing the guidewire.
Thus, the proposed device has a novelty and can be applied in a wide surgical practice. Figure 1 shows the diagram of utility model #1 for performing percutaneous dilatational tracheostomy. Figure 2 shows the actual type of clips for performing percutaneous dilated tracheostomy with and without guidewire.
Description of the clamp for holding organs and tissues during tracheostomy   sponges. The grooves are made on 2/3 of the length of the sponges. On the side surfaces, a mesh knurling is applied, and a guidewire 8 is placed in the longitudinal groove 6 of the first working sponge 4 (for the convenience of fixing the string when opening the clamp arms), and a through-side hole 9 is made on the longitudinal groove 7 of the second working sponge 5 for the guidewire. Tracheostomy using utility model #1 was performed with the same sequence as when performing any method.
Taking into account that tracheostomy was mainly performed by patients with PALV, the method was performed with bronchoscopic support and monitoring. Therefore, at the first stage of bronchoscopic control, the intubation tube was installed at the appropriate level just above the place of the intended puncture. The second stage was to make a skin incision up to 1.5 cm long above the jugular notch at the level of the 2nd half-ring of the trachea. The third stage was performed by pushing the superficial fascia of the neck in a blunt way. In this case, you can use one of the medium-sized surgical instruments with narrow branches (such as "mosquito").

The Results of Applying the Modified Technique of Percutaneous Tracheostomy
As shown by the analysis of the frequency of complications after MPTS, which is presented in Table 1, the number of complications was noted in 3 patients, and the average number of complications per patient was 1.7. Bleeding occurred in 1 (1.1%) case, also in one case, there was damage to the tracheal mucosa and emphysema of the neck and face, in 2 (2.2%) cases-infectious complications.
The details of the above-mentioned complications, depending on the presence of one of the risk factors for the development of a complicated course, are presented in Table 2.
Thus, out of 24 patients (with the presence of one or more risk factors), complications were observed in 3 patients, in 1 (4.2%) case related to technical aspects of tracheostomy and in 2 (8.3%) patients on the background of the General status.
The distribution of patients by the number of risk factors and the frequency of complications after MPTS is shown in Figure 3.
As can be seen from Figure 3, complicated course associated with technical aspects of MPTS was observed only in 1 (1.1%) of 4 patients (4.3%) with the  Note: *Confidence relative to the indicator with the corresponding risk factor; obesity of the 3rd degree was observed in 10 (10.8%) patients who underwent MPTS, of which in 1 (10.0%) case there was a complicated course on the background of the General status of the patient; short neck was observed in 9 (9.7%) patients of which 1 (11.1%) had a complication associated with technical aspects of tracheostomy; a history of thyroid surgery occurred in 2 (2.2%) patients who did not affect the development of complications in MPTS; tracheostomy on the background of tracheo-broncho-pulmonal complications was performed in 19 (20.4%) patients of which 2 patients had complications, in 1(5.3%) case related to technical aspects of tracheostomy and in 1 (5.3%) case-on the background of the General status of the patient; tracheostomy on the background of long-term ventilator (more than 7 days) was performed in 13 (14.0%) patients, 2 of whom had complications, 1 (7.7%) related to technical aspects of tracheostomy and 1 (7.7%) patients on the background of General status. Open Journal of Thoracic Surgery

Tracheostomy Results in Comparison Groups
When comparing the frequency of complications after various methods of TS depending on the presence of risk factors (Table 3), it was noted that the total number of patients with complicated course after TTS was 39 (38.6%), after normal PTS-8 (33.3%) and after MPTS-3 (12.5%). Patients with three or four risk factors had the highest percentage of complications. The number of patients A summary analysis of the incidence of complications, regardless of the cause-effect relationship of the latter is presented in Figure 6. As can be seen from the diagram (Figure 6), the highest (96.8%) percentage of satisfactory results was observed in patients after MPTS, in patients after TTS and PTS, this indicator was 80.6% and 87.3%, respectively.
Taking into account the fact that the modified method of PTS currently dominates in the RSCS named after acad. Vakhidov. Figure 7 shows Interesting in our opinion is the distribution of patients with a smooth course of tracheostomy, but having one or more risk factors for complications ( Table   5). As can be seen from the table, 55.6% of patients after PTS with 3rd degree obesity passed without complications, while this indicator in the group of patients with MPTS was 90.0%. The presence of a short neck also did not affect the     The indicator of tracheostomy completion time may be of particular interest for practical surgeons. Of course, this indicator is conditional and depends on many reasons. However, the average time calculated on such a large clinical material will reflect the real indicator ( Figure 10).
In the long-term period, 173 (62.2%) patients were followed up after TTS, 56 (80.6%) after PTS, and 75 (80.6%) patients after MPTS. As is known, the main complication of the long-term period after tracheostomy is the formation of tracheal stenosis. Figure 11 shows the frequency of tracheal stenosis formation in comparison groups. Thus, the highest percentage of stenosis was observed in patients after TTS and amounted to 12.1% (21), after PTS this indicator was noted in 8.9% (5) of cases and after MPTS in just 1.3% (1).

Conclusions
The analysis made it possible to draw the following conclusion: The improved forceps model for percutaneous dilational tracheostomy improves the technical aspects of manipulation by ensuring stable fixation of the guidewire, thereby reducing the risk of injury to surrounding tissues and the li-